Publications

• Hygen, Beate Wold; Skalicka, Vera; Coplan, Robert; Fredriksen, Eivor; von Soest, Tilmann & Bekkhus, Mona (2024). Norwegian Adolescents in the Initial Stages of COVID-19 Restrictions. Links between In-Person vs Digital Interactions, Digital Media Use Loneliness, and Mental Health Problems among . Journal of Media Psychology. ISSN 1864-1105. doi: 10.1027/1864-1105/a000401.
• Bjørndal, Ludvig Daae; Eilertsen, Espen Moen; Ayorech, Ziada; Cheesman, Rosa; Ahmadzadeh, Yasmin I. & Baldwin, Jessie R. [Show all 13 contributors for this article] (2024). Disentangling direct and indirect genetic effects from partners and offspring on maternal depression using trio-GCTA. Nature Mental Health. p. 1–12. doi: 10.1038/s44220-024-00207-3.
• Ayorech, Ziada; Torvik, Fartein Ask; Cheesman, Rosa; Eilertsen, Espen M.; Valstad, Mathias & Bjørndal, Ludvig Daae [Show all 9 contributors for this article] (2024). The structure of psychiatric comorbidity without selection and assortative mating. Translational Psychiatry. ISSN 2158-3188. 14(1), p. 1–9. doi: 10.1038/s41398-024-02768-4.
• Dahl, Andreas; Eilertsen, Espen Moen; Fernandez Rodriguez Cabello, Sara; Norbom, Linn B.; Tandberg, Anneli D. & Leonardsen, Esten [Show all 11 contributors for this article] (2024). Genetic and brain similarity independently predict childhood anthropometrics and neighborhood socioeconomic conditions. Developmental Cognitive Neuroscience. ISSN 1878-9293. 65, p. 1–11. doi: 10.1016/j.dcn.2023.101339. Full text in Research Archive
• Potrebny, Thomas; Nilsen, Sondre Aasen; Bakken, Anders; Soest, Tillman von; Kvaløy, Kirsti & Samdal, Oddrun [Show all 9 contributors for this article] (2024). Secular trends in mental health problems among young people in Norway: a review and meta-analysis. European Child and Adolescent Psychiatry. ISSN 1018-8827. p. 1–13. doi: 10.1007/s00787-024-02371-4.
• Verhoef, Ellen; Allegrini, Andrea G.; Jansen, Philip R.; Lange, Katherine; Wang, Carol A. & Morgan, Angela T. [Show all 64 contributors for this article] (2024). Genome-Wide Analyses of Vocabulary Size in Infancy and Toddlerhood: Associations With Attention-Deficit/Hyperactivity Disorder, Literacy, and Cognition-Related Traits. Biological Psychiatry. ISSN 0006-3223. 95(9), p. 859–869. doi: 10.1016/j.biopsych.2023.11.025. Full text in Research Archive
• Kozlowski Mayerhofer, Lilian Juliane; Nes, Ragnhild Bang; Lan, Xiaoyu; Czajkowski, Nikolai Olavi; Ystrøm, Eivind & Røysamb, Espen (2023). Wellbeing and illbeing in women exposed to physical and sexual violence: A population based longitudinal study. OSF Preprints.
• Hjarnaa, Louise; Møller, Sanne Pagh; Curtis, Alberte Brix; Becker, Ulrik; Andersen, Ove & Torvik, Fartein Ask [Show all 7 contributors for this article] (2023). Alcohol Intake and Academic Performance and Dropout in High School: A Prospective Cohort Study in 65,233 Adolescents. Journal of Adolescent Health. ISSN 1054-139X. 73, p. 1083–1092. doi: 10.1016/j.jadohealth.2023.07.008.
• McNeilly, Elizabeth A.; Mills, Kathryn L.; Kahn, Lauren E.; Crowley, Ryann; Pfeifer, Jennifer H. & Allen, Nicholas B. (2023). Adolescent Social Communication Through Smartphones: Linguistic Features of Internalizing Symptoms and Daily Mood. Clinical Psychological Science. ISSN 2167-7026. doi: 10.1177/21677026221125180.
• Ayorech, Ziada; Cheesman, Rosa; Eilertsen, Espen M.; Bjørndal, Ludvig Daae; Røysamb, Espen & McAdams, Tom A. [Show all 8 contributors for this article] (2023). Maternal depression and the polygenic p factor: A family perspective on direct and indirect effects. Journal of Affective Disorders. ISSN 0165-0327. 332, p. 159–167. doi: 10.1016/j.jad.2023.03.043. Full text in Research Archive
• Bjørndal, Ludvig Daae; Nes, Ragnhild Bang; Czajkowski, Nikolai Olavi & Røysamb, Espen (2023). The structure of well-being: a single underlying factor with genetic and environmental influences. Quality of Life Research. ISSN 0962-9343. 32, p. 2805–2816. doi: 10.1007/s11136-023-03437-7.
• Rosenström, Tom H. & Torvik, Fartein Ask (2023). Social anxiety disorder is a risk factor for alcohol use problems in the National Comorbidity Surveys. Drug and Alcohol Dependence. ISSN 0376-8716. 249, p. 1–6. doi: 10.1016/j.drugalcdep.2023.109945. Full text in Research Archive
• Wilhelmsen, Tiril; Røysamb, Espen; Lekhal, Ratib; Brandlistuen, Ragnhild Eek; Alexandersen, Nina & Wang, Mari Vaage (2023). Children's mental health: The role of multiple risks and child care quality. Journal of Applied Developmental Psychology. ISSN 0193-3973. 86. doi: 10.1016/j.appdev.2023.101546. Full text in Research Archive Show summary

  The benefit of universal access to Early Childhood Education and Care (ECEC) for children's development can depend on the ECEC quality and children's early childhood risks. This study utilised data from the Norwegian Mother, Father and Child Cohort Study (MoBa; N = 7355, 50.2% boys) to investigate the relative contribution of children's early childhood risk accumulated up to three years of age and five separate dimensions of ECEC quality on children's mental health (externalising and internalising problems) at five years of age rated by mothers and teachers. Results from the hierarchical regression models indicated that lower ECEC quality added to, and higher ECEC quality counteracted, the risk of mental health problems. Relationship quality was the strongest contributor. Total ECEC quality and relationship quality interacted significantly with early childhood risk, indicating that higher ECEC quality protected against, while lower ECEC quality exacerbated, the detrimental effects of early childhood risk on mental health problems.

• Cheesman, Rosa Catherine Gillespie; Ayorech, Ziada; Eilertsen, Espen Moen & Ystrøm, Eivind (2023). Why we need families in genomic research on developmental psychopathology. JCPP Advances. ISSN 2692-9384. 3(1). doi: 10.1002/jcv2.12138. Full text in Research Archive
• Gardiner, Gwendolyn; Lee, Daniel I.; Baranski, Erica; Funder, David C.; Beramendi, Maite & Bastian, Brock [Show all 50 contributors for this article] (2023). The economic well-being of nations is associated with positive daily situational experiences. Current Research in Ecological and Social Psychology (CRESP). 4.
• Frach, Leonard; Jami, Eshim S.; McAdams, Tom A.; Dudbridge, Frank & Pingault, Jean-Baptiste (2023). Causal Inference Methods for Intergenerational Research Using Observational Data. Psychological review. ISSN 0033-295X. 130(6), p. 1688–1703. doi: 10.1037/rev0000419. Full text in Research Archive
• Morken, Ida Sund; Viddal, Kristine Rensvik; von Soest, Tilmann Martin & Wichstrøm, Lars (2023). Explaining the Female Preponderance in Adolescent Depression—A Four-Wave Cohort Study. Research on Child and Adolescent Psychopathology. ISSN 2730-7166. 51, p. 859–869. doi: 10.1007/s10802-023-01031-6. Full text in Research Archive Show summary

  In the transition from childhood into adolescence, a female preponderance in depression emerges. Despite substantial empirical research to test theoretical propositions as to why this happens, our understanding is still limited. One explanation claims that girls become exposed to more stress (stress exposure model) whereas another proposes that girls become more vulnerable to the impact of stress (stress reactivity model) than boys when entering adolescence. Stressful life events (SLEs) and bullying victimization are established risk factors for adolescent depression. However, whether these factors contribute to the gender difference in depression is undetermined and thus investigated herein. Children (49.9% boys; n = 748) and parents from two birth cohorts in Trondheim, Norway, were followed biennially from ages 8 to 14 with clinical interviews about symptoms of depressive disorders and self-reports on SLEs. Teachers reported on bullying victimization. Prospective associations were investigated using an autoregressive latent trajectory model with structured residuals, examining within-person longitudinal associations while accounting for all time-invariant confounding effects. The number of depressive symptoms increased from ages 12 to 14 among girls. In the period before (ages 10 to 12), girls and boys were equally exposed to SLEs and bullying victimization. Increased stress (both SLEs and bullying victimization) at age 12 predicted increased depression at age 14 more strongly among girls than boys. Hence, increased impact—but not exposure—of SLEs and bullying victimization in girls may partly explain the emerging female preponderance in depression, in line with a stress reactivity model.

• Gjerde, Line Cecilie; Eilertsen, Espen Moen; McAdams, Tom A.; Cheesman, Rosa Catherine Gillespie; Moffitt, Terrie & Caspi, Avshalom [Show all 10 contributors for this article] (2023). The p factor of psychopathology and personality in middle childhood: genetic and gestational risk factors. Psychological Medicine. ISSN 0033-2917. 53(9), p. 4275–4285. doi: 10.1017/S0033291723000077. Full text in Research Archive
• Skåland, Vilde Randen; Havighurst, Sophie Seychelle; Nygaard, Egil & Teig, Inger Lise (2023). Qualitative evaluation of the implementation of “Tuning in to Kids” in Norwegian Kindergartens. BMC Psychology. ISSN 2050-7283. 11(1). doi: 10.1186/s40359-023-01088-4. Full text in Research Archive
• Alexandersen, Nina; Zachrisson, Henrik Daae; Røysamb, Espen; Wilhelmsen, Tiril; Wang, Mari Vaage & Brandlistuen, Ragnhild Eek (2023). Preschool structural quality and student–teacher closeness are related to children's adjustment: sibling-informed design. Early Childhood Research Quarterly. ISSN 0885-2006. 66, p. 48–60. doi: 10.1016/j.ecresq.2023.08.009. Full text in Research Archive
• Barth, Claudia; Tamnes, Christian Krog & Agartz, Ingrid (2023). Structural brain imaging in early-onset psychosis. In Agartz, Ingrid & Smelror, Runar (Ed.), Adolescent Psychosis: Clinical and Scientific Perspectives. Academic Press. ISSN 978-0-323-89832-4.
• Kullberg, Marie-Louise J.; Van Schie, Charlotte C.; Allegrini, Andrea G.; Ahmadzadeh, Yasmin; Wechsler, Daniel L. & Elzinga, Bernet M. [Show all 7 contributors for this article] (2023). Comparing findings from the random-intercept cross-lagged panel model and the monozygotic twin difference cross-lagged panel model: Maladaptive parenting and offspring emotional and behavioural problems. JCPP Advances. ISSN 2692-9384. doi: 10.1002/jcv2.12203. Full text in Research Archive
• Lockhart, Celestine; Bright, Joanna; Ahmadzadeh, Yasmin; Breen, Gerome; Bristow, Shannon & Boyd, Andy [Show all 16 contributors for this article] (2023). Twins Early Development Study (TEDS): A genetically sensitive investigation of mental health outcomes in the mid-twenties. JCPP Advances. ISSN 2692-9384. doi: 10.1002/jcv2.12154. Full text in Research Archive
• Badini, Isabella; Ahmadzadeh, Yasmin; Wechsler, Daniel L.; Lyngstad, Torkild Hovde; Rayner, Christopher & Eilertsen, Espen Moen [Show all 9 contributors for this article] (2023). Socioeconomic status and risk for child psychopathology: exploring gene–environment interaction in the presence of gene–environment correlation using extended families in the Norwegian Mother, Father and Child Birth Cohort Study. Journal of Child Psychology and Psychiatry. ISSN 0021-9630. 65(2), p. 176–187. doi: 10.1111/jcpp.13872. Full text in Research Archive
• Ulset, Vidar Sandsaunet; Venter, Zander; Kozák, Michal; Nordbø, Emma Charlott Andersson & von Soest, Tilmann Martin (2023). Increased nationwide use of green spaces in Norway during the COVID-19 pandemic. Environment International. ISSN 0160-4120. 180. doi: 10.1016/j.envint.2023.108190. Full text in Research Archive
• Nordmo, Magnus; Kleppestø, Thomas Haarklau; Sunde, Hans Fredrik; Flatø, Martin; Demange, Perline & Torvik, Fartein Ask (2023). The association between parental internalizing disorders and child school performance. npj Science of learning. ISSN 2056-7936. 8, p. 1–6. doi: 10.1038/s41539-023-00182-x. Full text in Research Archive
• Røysamb, Espen; Moffitt, Terrie; Caspi, Avshalom; Ystrøm, Eivind & Nes, Ragnhild Bang (2023). Worldwide Well-Being: Simulated Twins Reveal Genetic and (Hidden) Environmental Influences. Perspectives on Psychological Science. ISSN 1745-6916. 18(6), p. 1562–1574. doi: 10.1177/17456916231178716. Full text in Research Archive
• Bromley, Rebecca; Graz, Myriam Bickle; Bluett-Duncan, Matthew; Chambers, C.; Damkier, P. & Dietrich, K. [Show all 26 contributors for this article] (2023). Expert consensus on neurodevelopmental outcomes in pregnancy pharmacovigilance studies. Frontiers in Pharmacology. ISSN 1663-9812. 14. doi: 10.3389/fphar.2023.1094698. Full text in Research Archive
• Bjørndal, Ludvig Daae; Ebrahimi, Omid Vakili; Lan, Xiaoyu; Nes, Ragnhild Bang & Røysamb, Espen (2023). Mental Health and Environmental Factors in Adults: A Population-Based Network Analysis. American Psychologist. ISSN 0003-066X. doi: 10.1037/amp0001208.
• Yu, Baeksan; Zachrisson, Henrik Daae; Cheesman, Rosa Catherine Gillespie; Ystrøm, Eivind & Nes, Ragnhild Bang (2023). Boys with overweight status lagged behind girls with overweight status in reading: evidence from mendelian randomization. Journal of Clinical Epidemiology. ISSN 0895-4356. 159, p. 199–205. doi: 10.1016/j.jclinepi.2023.05.001. Full text in Research Archive
• Bølstad, Evalill; Koleini, Ada; Skoe, Frederik Ferstad; Kehoe, C.E.; Nygaard, Egil & Havighurst, Sophie Seychelle (2023). Emotional competence training promotes teachers’ emotion socialization and classroom environment: Effects from a TIK-in-School pilot study. Mental health & prevention. ISSN 2212-6570. 30. doi: 10.1016/j.mhp.2023.200273.
• Tsotsi, Stella; Goh, Shaun; Coplan, Robert J.; Bølstad, Evalill; Czajkowski, Nikolai Olavi & Smajlagic, Dinka [Show all 7 contributors for this article] (2023). Co-occurrence of internalizing difficulties and aggression in early childhood and risk of mental health problems in middle childhood. International Journal of Behavioral Development. ISSN 0165-0254. 47(5), p. 384–396. doi: 10.1177/01650254231187902. Full text in Research Archive
• Ferschmann, Lia; Overweg, Ingrid; Dégeilh, Fanny; Bekkhus, Mona; Havdahl, Alexandra & von Soest, Tilmann Martin [Show all 7 contributors for this article] (2023). Development of prosocial behavior and inhibitory control in late childhood: A longitudinal exploration of sex differences and reciprocal relations. Child Development. ISSN 0009-3920. 95(1), p. 313–323. doi: 10.1111/cdev.13978. Full text in Research Archive
• Buchanan, Erin M.; Lewis, Savannah C.; Paris, Bastien; Forscher, Patrick S.; Pavlacic, Jeffrey M. & Beshears, Julie E. [Show all 340 contributors for this article] (2023). The Psychological Science Accelerator's COVID-19 rapid-response dataset. Scientific Data. ISSN 2052-4463. 10, p. 1–15. doi: 10.1038/s41597-022-01811-7. Full text in Research Archive Show summary

  In response to the COVID-19 pandemic, the Psychological Science Accelerator coordinated three large-scale psychological studies to examine the effects of loss-gain framing, cognitive reappraisals, and autonomy framing manipulations on behavioral intentions and affective measures. The data collected (April to October 2020) included specific measures for each experimental study, a general questionnaire examining health prevention behaviors and COVID-19 experience, geographical and cultural context characterization, and demographic information for each participant. Each participant started the study with the same general questions and then was randomized to complete either one longer experiment or two shorter experiments. Data were provided by 73,223 participants with varying completion rates. Participants completed the survey from 111 geopolitical regions in 44 unique languages/dialects. The anonymized dataset described here is provided in both raw and processed formats to facilitate re-use and further analyses. The dataset offers secondary analytic opportunities to explore coping, framing, and self-determination across a diverse, global sample obtained at the onset of the COVID-19 pandemic, which can be merged with other time-sampled or geographic data.

• Kleppestø, Thomas Haarklau; Eilertsen, Espen Moen; van Bergen, Elsje; Sunde, Hans Fredrik; Zietsch, Brendan & Nordmo, Magnus [Show all 10 contributors for this article] (2023). Intergenerational transmission of ADHD behaviors: Genetic and environmental pathways. Psychological Medicine. ISSN 0033-2917. doi: 10.1017/S003329172300315X.
• Ahmadzadeh, Y. I.; Eilertsen, E. M.; Cheesman, R.; Rayner, C.; Ystrom, E. & Hannigan, L. J. [Show all 7 contributors for this article] (2023). Mothers' symptoms of anxiety and depression and the development of child temperament: A genetically informative, longitudinal investigation. JCPP Advances. ISSN 2692-9384. 3(4), p. 1–12. doi: 10.1002/jcv2.12171. Full text in Research Archive
• Wechsler, Daniel L.; Rijsdijk, Fruhling V.; Adamo, Nicoletta; Eilertsen, Espen Moen; Ahmadzadeh, Yasmin I. & Badini, Isabella [Show all 9 contributors for this article] (2023). Assessing aetiological overlap between child and adult attention-deficit hyperactivity disorder symptoms in an extended family design. BJPsych Open. ISSN 2056-4724. 9(5), p. 1–7. doi: 10.1192/bjo.2023.554. Full text in Research Archive
• Hannigan, Laurie; Lund, Ingunn Olea; Askelund, Jo Adrian Dahl; Ystrøm, Eivind; Corfield, Elizabeth Claire & Ask, Helga [Show all 7 contributors for this article] (2023). Genotype-environment interplay in associations between maternal drinking and offspring emotional and behavioral problems. Psychological Medicine. ISSN 0033-2917. 54(1), p. 203–214. doi: 10.1017/S0033291723003057. Full text in Research Archive
• Dégeilh, Fanny; von Soest, Tilmann; Ferschmann, Lia; Beer, Joanne C.; Gaubert, Malo & Koerte, Inga K. [Show all 7 contributors for this article] (2023). Social problems and brain structure development following childhood mild traumatic brain injury. Cortex. ISSN 0010-9452. 162, p. 26–37. doi: 10.1016/j.cortex.2023.02.003.
• Beck, Dani; Ferschmann, Lia; MacSweeney, Niamh; Norbom, Linn Christin Bonaventure; Wiker, Thea & Aksnes, Eira Ranheim [Show all 15 contributors for this article] (2023). Puberty differentially predicts brain maturation in male and female youth: A longitudinal ABCD Study. Developmental Cognitive Neuroscience. ISSN 1878-9293. 61. doi: 10.1016/j.dcn.2023.101261. Full text in Research Archive
• Zotcheva, Ekaterina; Bratsberg, Bernt Magne; Strand, Bjørn Heine; Jugessur, Astanand; Engdahl, Bo Lars & Bowen, Catherine [Show all 17 contributors for this article] (2023). Trajectories of occupational physical activity and risk of later-life mild cognitive impairment and dementia: the HUNT4 70+ study. The Lancet Regional Health - Europe. ISSN 2666-7762. 34. doi: 10.1016/j.lanepe.2023.100721. Full text in Research Archive Show summary

  High levels of occupational physical activity (PA) have been linked to an increased risk of dementia. We assessed the association of trajectories of occupational PA at ages 33–65 with risk of dementia and mild cognitive impairment (MCI) at ages 70+. Methods We included 7005 participants (49.8% were women, 3488/7005) from the HUNT4 70+ Study. Group-based trajectory modelling was used to identify four trajectories of occupational PA based on national registry data from 1960 to 2014: stable low (30.9%, 2162/7005), increasing then decreasing (8.9%, 625/7005), stable intermediate (25.1%, 1755/7005), and stable high (35.2%, 2463/7005). Dementia and MCI were clinically assessed in 2017–2019. We performed adjusted multinomial regression to estimate relative risk ratios (RRR) with 95% confidence intervals (CI) for dementia and MCI. Findings 902 participants were diagnosed with dementia and 2407 were diagnosed with MCI. Absolute unadjusted risks for dementia and MCI were 8.8% (95% CI: 7.6–10.0) and 27.4% (25.5–29.3), respectively, for those with a stable low PA trajectory, 8.2% (6.0–10.4) and 33.3% (29.6–37.0) for those with increasing, then decreasing PA; while they were 16.0% (14.3–17.7) and 35% (32.8–37.2) for those with stable intermediate, and 15.4% (14.0–16.8) and 40.2% (38.3–42.1) for those with stable high PA trajectories. In the adjusted model, participants with a stable high trajectory had a higher risk of dementia (RRR 1.34, 1.04–1.73) and MCI (1.80, 1.54–2.11), whereas participants with a stable intermediate trajectory had a higher risk of MCI (1.36, 1.15–1.61) compared to the stable low trajectory. While not statistically significant, participants with increasing then decreasing occupational PA had a 24% lower risk of dementia and 18% higher risk of MCI than the stable low PA group. Interpretation Consistently working in an occupation with intermediate or high occupational PA was linked to an increased risk of cognitive impairment, indicating the importance of developing strategies for individuals in physically demanding occupations to prevent cognitive impairment.

• Samuelsen, Kristin; Ystrøm, Eivind; Gjerde, Line Cecilie & Eilertsen, Espen Moen (2023). Kind of blue – An evaluation of etiologies for prenatal versus postnatal depression symptoms. Journal of Affective Disorders. ISSN 0165-0327. 335, p. 305–312. doi: 10.1016/j.jad.2023.04.135. Full text in Research Archive Show summary

  Prenatal and postnatal depression potentially have severe consequences, but we do not know to what extent they have the same etiological factors. Genetically informative designs yield insight into common etiology between pre- and postnatal depression and inform on potential prevention and intervention efforts. This study evaluates the overlap in genetic and environmental factors in pre- and postnatal depression symptoms. Methods We conducted univariate and bivariate modeling, using a quantitative, extended twin study. The sample was a subsample of the MoBa prospective pregnancy cohort study in 6039 pairs of related women. Measurement was conducted at week 30 of pregnancy and 6 months following delivery, using a self-report scale. Results The heritability of depressive symptoms was 16.2 % (95 % CI = 10.7–22.1) prenatally and 25.7 % (95 % CI = 19.2–32.2) postnatally. The correlation between risk factors for prenatal and postnatal depressive symptoms was at unity ( r = 1.00) for genetic effects, and at disunity ( r = 0.36) for environmental effects. The genetic effects for postnatal depressive symptoms were 1.7 times larger compared to prenatal depressive symptoms. Limitations Although genes for depression become more influential postpartum, only future studies can inform on the mechanisms for such a socio-biological augmentation of effect. Conclusion Genetic risk factors for prenatal and postnatal depressive symptoms are indistinguishable in kind, with greater impact after birth, whereas environmental risk factors for depression symptoms are mostly non-overlapping before and after birth. These findings indicate that interventions could be of different kind before and after birth.

• Lindseth, Linn Renate Sjøveian; de Lange, Ann-Marie Glasø; van der Meer, Dennis; Agartz, Ingrid; Westlye, Lars Tjelta & Tamnes, Christian Krog [Show all 7 contributors for this article] (2023). Associations between reproductive history, hormone use, APOE ε4 genotype and cognition in middle- to older-aged women from the UK Biobank. Frontiers in Aging Neuroscience. ISSN 1663-4365. 14:1014605, p. 1–13. doi: 10.3389/fnagi.2022.1014605. Full text in Research Archive Show summary

  Introduction: Relative to men, women are at a higher risk of developing age-related neurocognitive disorders including Alzheimer’s disease. While women’s health has historically been understudied, emerging evidence suggests that reproductive life events such as pregnancy and hormone use may influence women’s cognition later in life. Methods: We investigated the associations between reproductive history, exogenous hormone use, apolipoprotein (APOE) ε4 genotype and cognition in 221,124 middle- to older-aged (mean age 56.2 ± 8.0 years) women from the UK Biobank. Performance on six cognitive tasks was assessed, covering four cognitive domains: episodic visual memory, numeric working memory, processing speed, and executive function. Results: A longer reproductive span, older age at menopause, older age at first and last birth, and use of hormonal contraceptives were positively associated with cognitive performance later in life. Number of live births, hysterectomy without oophorectomy and use of hormone therapy showed mixed findings, with task-specific positive and negative associations. Effect sizes were generally small (Cohen’s d < 0.1). While APOE ε4 genotype was associated with reduced processing speed and executive functioning, in a dose-dependent manner, it did not influence the observed associations between female-specific factors and cognition. Discussion: Our findings support previous evidence of associations between a broad range of female-specific factors and cognition. The positive association between a history of hormonal contraceptive use and cognition later in life showed the largest effect sizes (max. d = 0.1). More research targeting the long-term effects of female-specific factors on cognition and age-related neurocognitive disorders including Alzheimer’s disease is crucial for a better understanding of women’s brain health and to support women’s health care.

• Voldsbekk, Irene; Kjelkenes, Rikka; Wolfers, Thomas; Dahl, Andreas; Lund, Martina Jonette & Kaufmann, Tobias [Show all 12 contributors for this article] (2023). Shared pattern of impaired social communication and cognitive ability in the youth brain across diagnostic boundaries. Developmental Cognitive Neuroscience. ISSN 1878-9293. 60. doi: 10.1016/j.dcn.2023.101219. Full text in Research Archive
• Jami, Eshim S.; Hammerschlag, Anke R.; Sallis, Hannah M.; Qiao, Zhen; Andreassen, Ole & Magnus, Per Minor [Show all 14 contributors for this article] (2023). Do environmental effects indexed by parental genetic variation influence common psychiatric symptoms in childhood? Translational Psychiatry. ISSN 2158-3188. 13. doi: 10.1038/s41398-023-02348-y. Full text in Research Archive
• Wootton, Robyn E; Lawn, Rebecca B.; Magnus, Maria C.; Treur, Jorien L.; Corfield, Elizabeth C. & Njølstad, Pål Rasmus [Show all 14 contributors for this article] (2023). Associations between health behaviours, fertility and reproductive outcomes: triangulation of evidence in the Norwegian Mother, Father and Child Cohort Study (MoBa). BMC Medicine. ISSN 1741-7015. 21. doi: 10.1186/s12916-023-02831-9. Full text in Research Archive
• Demontis, Ditte; Walters, G. Bragi; Athanasiadis, Georgios; Walters, Raymond; Therrien, Karen & Nielsen, Trine Tollerup [Show all 88 contributors for this article] (2023). Genome-wide analyses of ADHD identify 27 risk loci, refine the genetic architecture and implicate several cognitive domains. Nature Genetics. ISSN 1061-4036. 55, p. 198–208. doi: 10.1038/s41588-022-01285-8.
• Wiker, Thea; Pedersen, Mads Lund; Ferschmann, Lia; Beck, Dani; Norbom, Linn Christin Bonaventure & Dahl, Andreas [Show all 13 contributors for this article] (2023). Assessing the Longitudinal Associations Between Decision-Making Processes and Attention Problems in Early Adolescence. Research on Child and Adolescent Psychopathology. ISSN 2730-7166. doi: 10.1007/s10802-023-01148-8. Full text in Research Archive
• ENIGMA Clinical High Risk for, .; Haas, Shalaila S.; Ge, Ruiyang; Agartz, Ingrid; Amminger, G. Paul & Andreassen, Ole [Show all 51 contributors for this article] (2023). Normative Modeling of Brain Morphometry in Clinical High Risk for Psychosis. JAMA psychiatry. ISSN 2168-6238. 81(1), p. 77–88. doi: 10.1001/jamapsychiatry.2023.3850.
• Liu, Chaoyu; Ystrøm, Eivind & McAdams, Thomas Andrew (2023). Long-Term Maternal and Child Outcomes Following Postnatal SSRI Treatment. JAMA Network Open. ISSN 2574-3805. 6(8), p. 1–14. doi: 10.1001/jamanetworkopen.2023.31270. Full text in Research Archive
• Karl, Valerie Christine & Rohe, Tim (2023). Structural brain changes in emotion recognition across the adult lifespan. Social Cognitive & Affective Neuroscience. ISSN 1749-5016. 18(1), p. 1–15. doi: 10.1093/scan/nsad052. Full text in Research Archive Show summary

  Emotion recognition (ER) declines with increasing age, yet little is known whether this observation is based on structural brain changes conveyed by differential atrophy. To investigate whether age-related ER decline correlates with reduced grey matter (GM) volume in emotion-related brain regions, we conducted a voxel-based morphometry analysis using data of the Human Connectome Project-Aging (N = 238, aged 36–87) in which facial ER was tested. We expected to find brain regions that show an additive or super-additive age-related change in GM volume indicating atrophic processes that reduce ER in older adults. The data did not support our hypotheses after correction for multiple comparisons. Exploratory analyses with a threshold of P < 0.001 (uncorrected), however, suggested that relationships between GM volume and age-related general ER may be widely distributed across the cortex. Yet, small effect sizes imply that only a small fraction of the decline of ER in older adults can be attributed to local GM volume changes in single voxels or their multivariate patterns.

• Wiker, Thea; Norbom, Linn B.; Beck, Dani; Agartz, Ingrid; Andreassen, Ole A. & Alnæs, Dag [Show all 14 contributors for this article] (2023). Reaction Time Variability in Children Is Specifically Associated With Attention Problems and Regional White Matter Microstructure. Biological Psychiatry: Cognitive Neuroscience and Neuroimaging. ISSN 2451-9022. 8(8), p. 832–840. doi: 10.1016/j.bpsc.2023.03.010. Full text in Research Archive
• Voldsbekk, Irene; Kjelkenes, Rikka; Dahl, Andreas; Holm, Madelene Christin; Lund, Martina Jonette & Kaufmann, Tobias Herbert [Show all 10 contributors for this article] (2023). Delineating disorder-general and disorder-specific dimensions of psychopathology from functional brain networks in a developmental clinical sample. Developmental Cognitive Neuroscience. ISSN 1878-9293. 62. doi: 10.1016/j.dcn.2023.101271. Full text in Research Archive
• Tesli, Martin Steen; Nesvåg, Ragnar; Haukvik, Unn Kristin Hansen; Gustavson, Kristin; Tesli, Natalia & Friestad, Christine [Show all 12 contributors for this article] (2023). Common genetic and environmental risk for personality disorders and psychotic-like experiences in young adult twins. Acta Psychiatrica Scandinavica. ISSN 0001-690X. 148(6), p. 561–569. doi: 10.1111/acps.13596. Full text in Research Archive
• Hansen, Thomas; Hynek, Kamila Angelika; McMunn, Anne; Nes, Ragnhild Bang; Skirbekk, Vegard Fykse & Vollrath, Margarete E. [Show all 7 contributors for this article] (2023). Emerging costs in a “hidden” workforce: The longitudinal psychosocial effects of caregiving during the COVID-19 pandemic among Norwegian adults. Scandinavian Journal of Psychology. ISSN 0036-5564. p. 1–10. doi: 10.1111/sjop.12986. Full text in Research Archive
• Kozák, Michal; Bakken, Anders & von Soest, Tilmann Martin (2023). Psychosocial well-being before, during and after the COVID-19 pandemic: a nationwide study of more than half a million Norwegian adolescents. Nature Mental Health. doi: 10.1038/s44220-023-00088-y.
• Cortes Garcia, Laura; Wichstrøm, Lars; Cano, Ruben Agustin Rodriguez & von Soest, Tilmann Martin (2023). Within-Person Prospective Associations Between Disordered Eating, Appearance Dissatisfaction, and Depressive Symptoms From Adolescence to Midlife: A 28-Year Longitudinal Population-Based Study. Journal of Psychopathology and Clinical Science. ISSN 2769-7541. 132(8), p. 1031–1042. doi: 10.1037/abn0000860.
• Yu, Baeksan; von Soest, Tilmann Martin & Nes, Ragnhild Bang (2023). Do Municipal Contexts Matter for Adolescent Mental Health? A Within-Municipality Analysis of Nationwide Norwegian Survey Data Across Six Years. Research on Child and Adolescent Psychopathology. ISSN 2730-7166. 52, p. 169–182. doi: 10.1007/s10802-023-01123-3.
• Oftedal, Aurora; Tsotsi, Stella; Kaasen, Anne; Kozlowski Mayerhofer, Lilian Juliane; Røysamb, Espen & Smajlagic, Dinka [Show all 8 contributors for this article] (2023). Anxiety and depression in expectant parents: ART versus spontaneous conception. Human Reproduction. ISSN 0268-1161. 38(9), p. 1755–1760. doi: 10.1093/humrep/dead133. Full text in Research Archive
• Rodriguez-Cano, Ruben; Cortes Garcia, Laura & von Soest, Tilmann Martin (2023). The prospective reciprocal associations between smoking and depressive symptoms over three decades: A Random Intercept Cross-lagged Panel Model. Tobacco Prevention & Cessation. 9, p. 63–63. doi: 10.18332/TPC/162715.
• Ebad Fardzadeh, Haghish; Czajkowski, Nikolai Olavi & von Soest, Tilmann Martin (2023). Predicting suicide attempts among Norwegian adolescents without using suicide-related items: a machine learning approach. Frontiers in Psychiatry. ISSN 1664-0640. 14. doi: 10.3389/fpsyt.2023.1216791. Full text in Research Archive
• Kjelkenes, Rikka; Wolfers, Thomas; Alnæs, Dag; van der Meer, Dennis; Pedersen, Mads Lund & Dahl, Andreas [Show all 12 contributors for this article] (2023). Mapping Normative Trajectories of Cognitive Function and Its Relation to Psychopathology Symptoms and Genetic Risk in Youth. Biological Psychiatry: Global Open Science. ISSN 2667-1743. 3(2), p. 255–263. doi: 10.1016/j.bpsgos.2022.01.007. Full text in Research Archive
• Rodriguez Cano, Ruben; Kypriotakis, George; Cortes Garcia, Laura; Bakken, Anders & von Soest, Tilmann Martin (2023). Polysubstance use and its correlation with psychosocial and health risk behaviours among more than 95,000 Norwegian adolescents during the COVID-19 pandemic (January to May 2021): a latent profile analysis. The Lancet Regional Health - Europe. ISSN 2666-7762. p. 1–10. doi: 10.1016/j.lanepe.2023.100603. Full text in Research Archive
• Hynek, Kamila Angelika; Gotehus, Aslaug; Methi, Fredrik; Nes, Ragnhild Bang; Skirbekk, Vegard Fykse & Hansen, Thomas (2023). Caregiving + Migrant Background = Double Jeopardy? Associations between Caregiving and Physical and Psychological Health According to Migrant Backgrounds in Norway. International Journal of Environmental Research and Public Health (IJERPH). ISSN 1661-7827. 20(10). doi: 10.3390/ijerph20105800. Full text in Research Archive Show summary

  Informal caregiving can have detrimental consequences for physical and psychological health, but the impacts are highly heterogenous. A largely ignored question is whether these impacts differ with migrant backgrounds, and whether caregiving and a migrant background combine to create double jeopardy. We explored these questions using large-scale data that allows stratification by sex, regional background, and types (inside vs. outside of household) of caregivers. We used cross-sectional 2021 data collected from two Norwegian counties as part of the Norwegian Counties Public Health Survey (N = 133,705, RR = 43%, age 18+). The outcomes include subjective health, mental health, and subjective well-being. The findings show that both caregiving, especially in-household caregiving, and a migrant background relate to lower physical–psychological health. In bivariate analysis, non-Western caregivers, women particularly, reported poorer mental health and subjective well-being (but not physical health) than other caregiver groups. After controlling for background characteristics, however, no interaction exists between caregiver status and migrant background status. Although the evidence does not suggest double jeopardy for migrant caregivers, caution is warranted due to the likely underrepresentation of the most vulnerable caregivers of migrant backgrounds. Continued surveillance of caregiver burden and distress among people of migrant backgrounds is critical to develop successful preventive and supportive intervention strategies for this group, yet this aim hinges on a more inclusive representation of minorities in future surveys.

• Frøyland, Lars Roar; Pedersen, Willy; Stefansen, Kari & von Soest, Tilmann Martin (2023). Sexual and Physical Victimization and Health Correlates Among Norwegian Adolescents. Archives of Sexual Behavior. ISSN 0004-0002. 52, p. 2767–2777. doi: 10.1007/s10508-023-02604-8. Full text in Research Archive Show summary

  Large-scale epidemiological studies have documented that many children and adolescents are exposed to different forms of victimization experiences. However, such population-based studies have rarely examined how specific types of victimization are correlated with health indicators. Thus, we investigated sexual victimization, physical victimization by parents, and physical victimization by peers and their associations with sexual health, mental health, and substance use. We gathered data from a nationally representative sample of Norwegian 18–19-year-old students in their final year of senior high school (N = 2075; 59.1% girls). The analyses showed that 12.1% of the adolescents reported sexual victimization experiences. Physical victimization was more prevalent: 19.5% of the respondents had been exposed to victimization from parents and 18.9% from peers. Multivariate analyses revealed specific associations between sexual victimization and a range of sexual health indicators, such as early sexual intercourse debut, many sexual partners, engaging in sex without contraception while intoxicated, and participating in sexual acts for payment. Neither physical victimization from parents nor from peers were correlated with these variables. However, all three forms of victimization were associated with impaired mental health and potential substance use problems. We conclude that a variety of victimization experiences should be addressed in policies for prevention of adolescent mental health and substance use problems. In addition, a special emphasis is warranted regarding sexual victimization: Sexual health policies should address such potential experiences in addition to more traditional themes such as reproductive health and should also include low-threshold services for young victims of sexual victimization.

• Forster, Grace Katharine; Aarø, Leif Edvard; Alme, Maria Nordheim; Hansen, Thomas; Nilsen, Thomas Sevenius & Vedaa, Øystein (2023). Built Environment Accessibility and Disability as Predictors of Well-Being among Older Adults: A Norwegian Cross-Sectional Study. International Journal of Environmental Research and Public Health (IJERPH). ISSN 1661-7827. 20(10), p. 1–15. doi: 10.3390/ijerph20105898. Full text in Research Archive Show summary

  Knowledge about the influence environmental factors have on well-being is important to deliver policies supporting healthy ageing and sustainable health equity. An under-researched question is whether and how the built environment plays a role on well-being among older adults with disabilities. This study explores the relationship between built environment accessibility and disability on psychosocial well-being among older adults. Data were used from the Norwegian Counties Public Health Survey collected during February 2021 in Møre and Romsdal county (N = 8274; age = 60–97, mean = 68.6). General linear modelling was performed to examine the relationship and interaction between built environment accessibility (services, transportation, and nature) and disability on psychosocial well-being (quality of life, thriving, loneliness, and psychological distress). Higher levels of disability and poorer accessibility were each significantly related to lower psychosocial well-being across all variables (p < 0.001). Significant interaction effects were observed between disability and built environment accessibility on thriving (F(8, 5936) = 4.97, p < 0.001, η 2 = 0.006) and psychological distress (F(8, 5957) = 3.09, p = 0.002, η 2 = 0.004). No significant interaction effects were found for quality of life and loneliness. These findings indicate good built environment accessibility is associated with thriving and reduces psychological distress among older adults with disabilities. This study supports and extends previous findings on the importance of accessible and equipped environments for well-being and may aid policy makers when planning built environments to foster healthy ageing among this population group

• Svendsrud, Hedvig; Fredriksen, Eivor; Moe, Vibeke; Smith, Lars; Tsotsi, Stella & Ullebø, Anne Karin [Show all 9 contributors for this article] (2023). Becoming Dad: Expectant Fathers’ Attachment Style and Prenatal Representations of the Unborn Child. Children. ISSN 2227-9067. 10(7). doi: 10.3390/children10071187. Show summary

  How expectant fathers think and feel about the unborn child (prenatal representations), has shown associations with fathers’ postnatal parenting behaviors, observed father–infant interactional quality and child cognitive development. There is limited knowledge about fathers’ prenatal representations. The present study examined if fathers’ partner-related attachment styles were related to their prenatal representations of the unborn child. In the “Little in Norway Study”, an ongoing prospective, longitudinal population-based study, 396 expectant fathers completed the Experiences in Close Relationships Scale at enrollment (mean gestational week = 23.76, SD = 4.93), and in gestational weeks 27–35 completed three questions assessing prenatal representations. Correlations of attachment style and prenatal representations were reported using logistic regression analyses. We found that an avoidant attachment style by fathers were predicted to have absent or negative representations on all three items (1) “strongest feeling about the unborn child” (Cl = 1.19–2.73), (2) “thoughts about child personality” (Cl = 1.16–1.87), and (3) “experiences of relationship with the child” (Cl = 1.14–1.75). Father anxious attachment style was not significantly associated with absent or negative prenatal representations. Results suggest that expectant fathers with a partner related avoidant attachment style have an increased risk of having absent or negative prenatal representations of the unborn child.

• Aunsmo, Ragnhild Holmberg; Langballe, Ellen Melbye; Hansen, Thomas; Selbæk, Geir & Strand, Bjørn Heine (2023). Time trends in loneliness from 1984 to 2019 among 27,032 older adults in Norway: A HUNT study. Preventive Medicine. ISSN 0091-7435. 175. doi: 10.1016/j.ypmed.2023.107659. Full text in Research Archive Show summary

  The aging population and increasing evidence of the detrimental health impacts of loneliness emphasize the importance of studying and predicting changes in loneliness prevalence among older adults. To understand and project changes in loneliness over time, we examined 35-year trends in adults aged 70 and older, considering factors such as sex, age, and living situation. Cross-sectional data from 27,032 home-dwelling adults aged 70 years and older who participated in at least one of the four Norwegian HUNT surveys from 1984 to 2019, and Norwegian population data from Statistics Norway were used for the analyses. Loneliness was self-reported, and the prevalence of loneliness was standardized to the Norwegian population at the survey year by age and sex. The results showed that the prevalence of loneliness significantly decreased between each survey. The higher categories of loneliness (a good amount, very much) decreased, from 11.4% (1995–97), 6.7% (2006–08), and 5.8% (2017–19). Across surveys, loneliness was significantly more common among women, the oldest, and those living alone. The prevalence of loneliness among the oldest adults living alone increased from 2006 to 2019. The gradual decline in loneliness observed from 1995 to 2019 coincided with notable societal changes in Norway. We estimated that the number of older adults experiencing loneliness in Norway could rise from 184,000 in 2020 to 286,000 in 2035, and potentially reach 380,000 in 2050.

• Constantinou, Andrea; von Soest, Tilmann Martin; Zachrisson, Henrik Daae; Torvik, Fartein Ask; Cheesman, Rosa Catherine Gillespie & Ystrøm, Eivind (2023). Childhood personality and academic performance: A sibling fixed-effects study. Journal of Personality. ISSN 0022-3506. p. 1–13. doi: 10.1111/jopy.12900. Full text in Research Archive
• Fluit, Sam; Kunst, Jonas R.; Bierwiaczonek, Kinga & von Soest, Tilmann (2023). Self-esteem trajectories over three decades predict opposition to social equality in midlife. Proceedings of the National Academy of Sciences of the United States of America. ISSN 0027-8424. 120(1). doi: 10.1073/pnas.2212906120. Full text in Research Archive
• Tamnes, Christian Krog & Ferschmann, Lia (2022). Ungdommers atferd og hjerneutvikling. In Lundgren, Charlotte (Eds.), Psykisk oppvekst. Barn og unges psykiske helse fra 0-25 år. Rådet for psykisk helse. ISSN 978-82-91635-46-0. p. 50–57.
• Richmond-Rakerd, Leah S.; D'Souza, Stephanie; Milne, Barry J.; Caspi, Avshalom & Moffitt, Terrie (2022). Longitudinal Associations of Mental Disorders with Dementia: 30-Year Analysis of 1.7 Million New Zealand Citizens. JAMA psychiatry. ISSN 2168-6238. 79(4), p. 333–340. doi: 10.1001/jamapsychiatry.2021.4377.
• Skaug, Eirunn; Czajkowski, Nikolai Olavi; Waaktaar, Trine & Torgersen, Svenn (2022). Childhood Trauma and Borderline Personality Disorder Traits: A Discordant Twin Study. Journal of Psychopathology and Clinical Science. ISSN 2769-7541. 131(4), p. 365–374. doi: 10.1037/abn0000755.
• Løset, Gøril Kvamme; Hellevik, Tale & von Soest, Tilmann (2022). Basic human values and sick leave: A study combining two-wave survey data with longitudinal register data. Scandinavian Journal of Psychology. ISSN 0036-5564. 63(6), p. 658–669. doi: 10.1111/sjop.12855. Full text in Research Archive
• Løset, Gøril Kvamme & von Soest, Tilmann (2022). Big five personality traits and physician-certified sickness absence. European Journal of Personality. ISSN 0890-2070. 37(2), p. 239–253. doi: 10.1177/08902070211065236. Full text in Research Archive
• Pedersen, Willy; Mastekaasa, Arne & von Soest, Tilmann (2022). Cannabis and Tobacco Use Among Young People and Labor Market Outcomes in Midlife: A 23-Year Population-Based Longitudinal Study. Journal of Studies on Alcohol and Drugs. ISSN 1937-1888. 83(5), p. 731–739. doi: 10.15288/jsad.21-00311.
• Miljeteig, Kristina & von Soest, Tilmann (2022). An experience sampling study on the association between social media use and self-esteem. Journal of Media Psychology. ISSN 1864-1105. doi: 10.1027/1864-1105/a000333.
• Ulset, Vidar Sandsaunet & von Soest, Tilmann (2022). Posttraumatic growth during the COVID-19 lockdown: A large-scale population-based study among Norwegian adolescents. Journal of Traumatic Stress. ISSN 0894-9867. doi: 10.1002/jts.22801.
• Cortes Garcia, Laura; Rodriguez Cano, Ruben & von Soest, Tilmann (2022). Prospective associations between loneliness and disordered eating from early adolescence to adulthood. International Journal of Eating Disorders. ISSN 0276-3478. doi: 10.1002/eat.23793.
• Guggenheim, Jeremy A; Clark, Rosie; Zayats, Tetyana; Williams, Cathy & UK BIObank, Eye and vision consortium (2022). Assessing the contribution of genetic nurture to refractive error. European Journal of Human Genetics. ISSN 1018-4813. doi: 10.1038/s41431-022-01126-6.
• Richie-Halford, A.; Cieslak, M.; Ai, L.; Cafarra, S.; Covitz, S. & Franco, A. R. [Show all 50 contributors for this article] (2022). An analysis ready and quality controlled resource for pediatric brain white-matter research. Scientific Data. ISSN 2052-4463. 9. doi: 10.1038/s41597-022-01816-2.
• Lund, Ingunn Olea & Ystrøm, Eivind (2022). Prenatal alcohol exposure and child sleep problems: A family-based quasi-experimental study. JCPP Advances. ISSN 2692-9384. 2(4). doi: 10.1002/jcv2.12111. Full text in Research Archive Show summary

  Background We examine whether associations between prenatal exposure to hazardous maternal alcohol consumption during the first trimester of pregnancy and sleep problems in young children represent a causal association. Methods The population-based sample consists of 15,911 mothers with 30,395 offspring from the Norwegian Mother, Father, and Child Cohort Study (MoBa) and the Medical Birth Registry of Norway (MBRN). Women self-reported pre-pregnancy alcohol consumption and consumption during the first trimester of pregnancy twice: at gestational weeks 17 and 30. Mothers reported their children's sleep problems, when they were 1.5 and 3 years (mean = 50; SD = 10). We tested models adjusting for (1) measured confounders, (2) unmeasured familial risk factors by sibling design, and (3) maternal hazardous drinking in the 3 months prior to pregnancy as an instrumental variable within the sibling design. Results Children of mothers with hazardous drinking during the first trimester were at increased risk of sleep problems at 1.5 (β = 1.14, 95%CI 0.04–2.25) and 3 (β = 2.86, 95%CI 1.85–3.87) years of age. These associations were reduced to close to zero and non-significant at 1.5 (β = −0.32, 95%CI −1.91–1.26) and 3 (β = 0.06, 95%CI −1.56–1.64) years when controlling for both familial and measured environmental risk factors. Conclusions There is a moderate association between maternal hazardous drinking during pregnancy and offspring sleep problems up to age three. This association is explained by risk factors differing between families and does not reflect a cause-effect relationship.

• Sælid, Gry Anette; Czajkowski, Nikolai Olavi; Aarø, Leif Edvard; Andersen, John Roger; Idsøe, Thormod & Helleseter, Miguel Delgado [Show all 7 contributors for this article] (2022). Effects of a school-based intervention on levels of anxiety and depression: a cluster-randomized controlled trial of the MindPower program in ten high schools in Norway. BMC Psychology. ISSN 2050-7283. 10, p. 1–14. doi: 10.1186/s40359-022-00721-y. Full text in Research Archive
• Walton, Esther; Bernardoni, Fabio; Batury, Victoria-Luise; Bahnsen, Klaas; Larivière, Sara & Abbate-Daga, Giovanni [Show all 59 contributors for this article] (2022). Brain Structure in Acutely Underweight and Partially Weight-Restored Individuals With Anorexia Nervosa: A Coordinated Analysis by the ENIGMA Eating Disorders Working Group. Biological Psychiatry. ISSN 0006-3223. 92(9), p. 730–738. doi: 10.1016/j.biopsych.2022.04.022. Full text in Research Archive
• Solheim Kvamme, Line; Keles, Serap; Nes, Ragnhild Bang; Vaskinn, Linda; Waaler, Pamela Marie & Wentzel-Larsen, Tore [Show all 7 contributors for this article] (2022). Common Practice Elements in Treatment Programs for Adolescents with Externalizing and Internalizing Problems: A Meta-Analysis. Residential Treatment for Children & Youth. ISSN 0886-571X. doi: 10.1080/0886571X.2022.2111397. Full text in Research Archive
• Norbom, Linn Christin Bonaventure; Hanson, Jamie; van der Meer, Dennis; Ferschmann, Lia; Røysamb, Espen & von Soest, Tilmann [Show all 10 contributors for this article] (2022). Parental socioeconomic status is linked to cortical microstructure and language abilities in children and adolescents. Developmental Cognitive Neuroscience. ISSN 1878-9293. 56. doi: 10.1016/j.dcn.2022.101132. Full text in Research Archive
• Baldwin, Helen; Radua, Joaquim; Antoniades, Mathilde; Haas, Shalaila S.; Frangou, Sophia & Agartz, Ingrid [Show all 111 contributors for this article] (2022). Neuroanatomical heterogeneity and homogeneity in individuals at clinical high risk for psychosis. Translational Psychiatry. ISSN 2158-3188. 12(297). doi: 10.1038/s41398-022-02057-y. Full text in Research Archive
• Warrier, Varun; Zhang, Xinhe; Reed, Patrick; Havdahl, Alexandra; Moore, Tyler M. & Cliquet, Freddy [Show all 83 contributors for this article] (2022). Genetic correlates of phenotypic heterogeneity in autism. Nature Genetics. ISSN 1061-4036. 54(9), p. 1293–1304. doi: 10.1038/s41588-022-01072-5. Full text in Research Archive
• Caramaschi, Doretta; Neumann, Alexander; Cardenas, Andres; Tindula, Gwen; Alemany, Silvia & Zillich, Lea [Show all 40 contributors for this article] (2022). Meta-analysis of epigenome-wide associations between DNA methylation at birth and childhood cognitive skills. Molecular Psychiatry. ISSN 1359-4184. 27, p. 2126–2135. doi: 10.1038/s41380-022-01441-w. Full text in Research Archive
• Kendler, Kenneth S.; Czajkowski, Nikolai Olavi & Reichborn-Kjennerud, Ted (2022). Ludvig Dahl's psychiatric genetic studies in his 1859 monograph: “Contribution to the knowledge of insanity in Norway”. American Journal of Medical Genetics Part B: Neuropsychiatric Genetics. ISSN 1552-4841. 189(6), p. 177–184. doi: 10.1002/ajmg.b.32914. Full text in Research Archive
• Harris, Gerd Marie Eskerud; Wood, Mollie; Ystrøm, Eivind & Nordeng, Hedvig Marie Egeland (2022). Association of Maternal Use of Triptans during Pregnancy with Risk of Attention-Deficit/Hyperactivity Disorder in Offspring. JAMA Network Open. ISSN 2574-3805. 5(6). doi: 10.1001/jamanetworkopen.2022.15333. Full text in Research Archive
• Grzeskowiak, Luke E.; Saha, Moni R.; Nordeng, Hedvig Marie Egeland; Ystrøm, Eivind & Amir, Lisa H. (2022). Perinatal antidepressant use and breastfeeding outcomes: Findings from the Norwegian Mother, Father and Child Cohort Study. Acta Obstetricia et Gynecologica Scandinavica. ISSN 0001-6349. 101(3), p. 344–354. doi: 10.1111/aogs.14324. Full text in Research Archive
• Clayborne, Zahra M.; Nilsen, Wendy; Torvik, Fartein Ask; Gustavson, Kristin; Bekkhus, Mona & Gilman, Stephen [Show all 9 contributors for this article] (2022). Positive maternal mental health attenuates the associations between prenatal stress and children’s internalizing and externalizing symptoms. European Child and Adolescent Psychiatry. ISSN 1018-8827. doi: 10.1007/s00787-022-01999-4. Full text in Research Archive
• Vassend, Olav Mandt; Czajkowski, Nikolai Olavi; Røysamb, Espen & Nielsen, Christopher Sivert (2022). The role of neuroticism and pain in dental anxiety: A twin study. Community Dentistry and Oral Epidemiology. ISSN 0301-5661. doi: 10.1111/cdoe.12763. Full text in Research Archive
• Walle, Kjersti Mæhlum; Askeland, Ragna Bugge; Gustavson, Kristin; Mjaaland, Siri; Ystrøm, Eivind & Lipkin, W. Ian [Show all 13 contributors for this article] (2022). Risk of attention-deficit hyperactivity disorder in offspring of mothers with infections during pregnancy. JCPP Advances. ISSN 2692-9384. 2(2), p. 1–11. doi: 10.1002/jcv2.12070. Full text in Research Archive
• Skaug, Eirunn; Czajkowski, Nikolai Olavi; Waaktaar, Trine & Torgersen, Svenn (2022). The role of sense of coherence and loneliness in borderline personality disorder traits: a longitudinal twin study. Borderline personality disorder and emotion dysregulation (BPDED). ISSN 2051-6673. 9. doi: 10.1186/s40479-022-00190-0. Full text in Research Archive
• Trønnes, Johanne Naper; Lupattelli, Angela; Ystrøm, Eivind & Nordeng, Hedvig Marie Egeland (2022). Analysis of Prenatal Exposure to Opioid Analgesics and Scholastic Skills in Children in Fifth Grade in Norway. JAMA Network Open. ISSN 2574-3805. 5(7). doi: 10.1001/jamanetworkopen.2022.22425. Full text in Research Archive
• Hart, Rannveig Kaldager; Pedersen, Willy & Skardhamar, Torbjørn (2022). Blowing in the wind? Testing the effect of weather on the spatial distribution of crime using Generalized Additive Models. Crime Science. ISSN 2193-7680. 11. doi: 10.1186/s40163-022-00171-2. Full text in Research Archive
• Brekke, Idunn; Smith, Otto Robert Frans; Skjønsberg, Eia Elena; Holt, Tonje; Helland, Maren Sand & Aarø, Leif Edvard [Show all 11 contributors for this article] (2022). Effectiveness of the International Child Development Programme: Results from a randomized controlled trial. Child & Family Social Work. ISSN 1356-7500. p. 1–15. doi: 10.1111/cfs.12973. Full text in Research Archive

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• Hansen, Thomas (2024). Flere unge er blitt ensomme- disse er spesielt utsatt. [Internet]. forskning.no.
• Hansen, Thomas (2024). Tvillingene har vært sammen om alt i 37 år. Men deler seg i synes på en sak. [Internet]. Stavanger Aftenblad.
• Hansen, Thomas (2024). Sosial isolasjon og ensomhet: hvorfor er de så vanskelig (og viktig) å bekjempe?
• Hansen, Thomas (2024). Ensomhet: hvorfor er det så vanskelig (og viktig) å bekjempe?
• Hansen, Thomas (2024). En gruppe menn får ikke napp hos damene. [Internet]. Nettavisen.
• Hansen, Thomas (2024). Om skravlebøtter og ensomhet. [Radio]. NRK P1+.
• Hansen, Thomas (2024). Slik takler du folk som snakker for mye. [Internet]. forskning.no.
• Fluit, Sam; Kunst, Jonas R.; Bierwiaczonek, Kinga & von Soest, Tilmann (2024). Are Political Attitudes in Adulthood Rooted in Past Teenage Insecurities?
• Hansen, Thomas (2023). Mindfulness kan hjelpe mot ensomhet. [Newspaper]. Aftenposten.
• Hansen, Thomas (2023). Line (40) har alltid visst at hun ikke vil ha barn. [Newspaper]. Askøyværingen.
• Hansen, Thomas (2023). Livskvalitet og ensomhet i eldre år: Grep for en god alderdom.
• von Soest, Tilmann Martin (2023). - Foreldrenes dårlige selvfølelse kan "smitte" over på barnet. [Newspaper]. Aftenposten.
• Hansen, Thomas (2023). Selv en liten prat med en venn kan senke stressnivået. [Internet]. forskning.no.
• Hansen, Thomas (2023). Thor trodde en dame skulle redde ham ut av ensomheten. En skjebnesvanger dag endret alt. [Internet]. Nettavisen.
• Hansen, Thomas (2023). Loneliness and social isolation in later life: prevalence, health effects, and interventions.
• Hansen, Thomas (2023). På tide å snakke om ensomhet. [Internet]. Veien.
• Hansen, Thomas (2023). Mennene som kjøper sex. [Internet]. Nettavisen.
• Hansen, Thomas (2023). Det er en myte at man blir lykkeligere av å få barn. [Newspaper]. Agderposten.
• Hansen, Thomas (2023). Is it worth having kids? [Internet]. The Economist (economist.com/films).
• Hansen, Thomas (2023). Den viktige klemmen: – Lever på dette hele uka. [Internet]. nrk.no.
• Hansen, Thomas (2023). Vennskap, forhold. [Internet]. Nettavisen.
• Hansen, Thomas (2023). Livskvalitet blant omsorgsgivere i koronatiden.
• Hansen, Thomas (2023). Da Erika (25) ble med moren på vinkveld, oppsto et overraskende vennskap: – Kommer aldri til å stjele en type fra meg. [Internet]. Halden arbeiderblad.
• Hansen, Thomas (2023). Verdien av smalltalk. [Radio]. Ukeslutt. P1 NRK.
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• Hansen, Thomas (2023). Den eneste bursdagsgaven Tormod fikk var en kaffepose fra Jernia. [Internet]. Nettavisen.
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• Hansen, Thomas (2023). De livsviktige fellesskapene for folk. [Internet]. frelsesarmeen.no/krigsropet.
• Hansen, Thomas (2023). Fire typer ansatte er mer ensomme på jobben enn andre. [Internet]. forskning.no.
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• Hansen, Thomas (2023). Ny studie: Ensomhet blant eldre i Norge - andelen har gått ned, men antallet vil øke. [Business/trade/industry journal]. Dagens Medisin.
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  Forsker mener betydningen av gener må vurderes bedre etter at ny studie viser at barn av foreldre med høy utdanning drar i fra de andre på skolen.

• Bjørnebekk, Astrid Kristine; Ystrøm, Eivind & Nordengen, Kaja (2023). Sitter personligheten din i hjernen?
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• Eilertsen, Espen Moen (2023). svcm - Fit structured variance component models with sparse relationship matrices. Show summary

  svcm is an R-package intended for (relatively) easy specification of models combining structural equation models with sparse relationship matrices. The structural equations model involve unknown parameters that describe dependence across variables. The relationship matrix may for example encode genetic relatedness or different forms of shared environments and describe dependence across individuals. The interface is inspired by OpenMx, but uses the Matrix package for computation.

• Eilertsen, Espen Moen (2023). GREMLModels.jl - A Julia package for fitting variance component models with relationship matrices . Show summary

  GREMLModels.jl is a Julia package for fitting variance component models that are structured according to known, dense, relationship matrices. The intended use case is the analysis of genetic and environmental components of variance for quantitative traits, when genetic relationship matrices are computed from genome-wide SNP data.

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  jenter bedre på skolen gutter fordi de kommer tidlig i puberteten viser en ny rapport fra Folkehelseinstituttet

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  https://www.morgenbladet.no/aktuelt/2023/07/03/noen-skoler-utjevner-genetiske-forskjeller-bedre-enn-andre/

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• von Soest, Tilmann Martin (2023). Utenforskap blant barn og unge. Show summary

  Norge topper statistikker over gode levekår. Men hvordan har egentlig barn og unge det i et av verdens beste land å bo i? For selv om mange har det bra gjelder ikke det alle. Sosiale forskjeller øker og faktorer som økonomi, familieforhold, vennskap, og skole henger sammen med frafall, utenforskap og dårlig psykisk helse. Hvordan står det til med disse faktorene blant norske barn og unge og hva vet vi om hvordan disse har utviklet seg de siste årene?

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• Eilertsen, Maja; Nes, Ragnhild Bang; Czajkowski, Nikolai Olavi; Røysamb, Espen & Prydz, Monica Beer (2022). Promoting Wellbeing using the Five Ways to Wellbeing framework .
• Fabian, Streit; Witt, Stephanie H.; Hindley, Guy Frederick Lanyon; Kuja-Halkola, Ralf & Ystrøm, Eivind (2022). Genomics of borderline personality disorder. Show summary

  Factors such as early trauma or abuse are well-established environmental risk factors for the development of Borderline Personality Disorder (BPD). Compared to other mental disorders, little attention has been paid to the contribution of genetic risk factors. The present symposium aims to give an overview of how family and twin studies, and molecular genetic studies can contribute to the understanding of the disorder, and its relationship to risk factors and comorbid disorders: Eivind Ystrom will present on how twin studies can be used to investigate genetic and environmental risk factors contributing to comorbidity between BPD, mental disorders, and substance abuse. Using interview data from a population-based twin study, Ystrom and colleagues have found that genetic factors are the main contributors to the 10-year stability of BPD. Genetic factors for BPD are to a great extent overlapping with the risk for antisocial PD and substance use disorders. However, BPD is related to stressful life events, internalizing symptoms and personality disorders, and substance abuse over and beyond what can be explained by common genetic risk factors. Ralf Kuja-Halkola will present how national health register data can be used to investigate genetic contributions. Using twins and siblings, familial aggregation of clinical BPD diagnosis was investigated, and the heritability of BPD was estimated to 46%. The familial co-aggregation between BPD and attention deficit hyperactivity disorder (ADHD) was estimated, e.g. full siblings of individuals with ADHD diagnosis have a 2.8 times increased risk of having a BPD diagnosis compared to full siblings of individuals without ADHD diagnosis. Additionally, the co-aggregation in full siblings between BPD and a range of psychiatric and somatic disorders, and behavioral traits will be presented. Fabian Streit will present the initial results of the largest genome-wide association study (GWAS) which systematically investigates the contribution of common genetic variants to BPD. In a meta-analysis including over 6000 cases, and 500,000 controls. The results highlight first associated genes, also related to comorbid disorders, such as post-traumatic stress disorder (PTSD), or ADHD. Polygenic risk scores predicted up to 3% of the variance in case-control status. Positive genetic correlations were observed with other psychiatric disorders, most pronounced with PTSD, depression, ADHD, and anxiety. Additional analyses indicated genetic correlations with factors such as somatic disorders, pain, mood swings, childhood maltreatment, and material deprivation. Guy Hindley will present molecular genetic investigations of mood instability, a key component of BPD. A recent GWAS identified a strong positive genetic correlation of the trait with depression but weak correlations with bipolar disorder and schizophrenia. However, genetic correlation does not capture shared genetic variants with mixed effect directions. By applying statistical tools which capture mixed effect directions, the extensive genetic overlap between mood instability and all three mental disorders could be demonstrated, irrespective of their genetic correlation. This overlap was used to identify 246 novel genetic loci associated with mood instability. Biological characterization highlighted a convergence on synaptic gene-sets. These findings indicate shared neurobiological mechanisms between mood instability and diverse mental disorders.

• Ystrøm, Eivind & Reichborn-Kjennerud, Ted (2022). Genomics of borderline personality disorder: Common Genetic Factors for Personality Disorders, Common Mental Disorders, Substance Abuse, and Stressful Life Events: A population based longitudinal twin study. Show summary

  Objectives: To evaluate the contribution of genetic and environmental factors for stability in, comorbidity with, and life events related to personality disorders. Methods: DSM-IV criteria for 10 personality disorders were assessed using structured interviews in 2801 Norwegian twins in early adulthood (age 28; range 19-36) and again in 2282 twins 10 years later. Biometric models were used on criteria counts to analyze the genetic and environmental factors for PDs and: 10-year stability, comorbidity with common mental disorders and psychotic-like experiences, substance abuse, and stressful life events. Results: Heritability of PDs were estimated to be 40% to 20% heritable. The 10-year stability estimated as tetrachoric correlation of PDs ranged from .35 to .58. Genetic variants influencing PDs were estimated to be the same over 10 years, the environmental factors were estimated to change 74-84% over the same period. Genetic and environmental factors for comorbidity between PDs and common mental disorders have different dimensionality and structure. The link between PDs and substance use are dependent on the specific criteria endorsed rather than at the disorder level. Stressful life events are important for the development of PDs and substance use over and beyond what can be explained by life-course selection due to genetic risk. Conclusion: Although PDs at specific assessments are mostly influenced by environmental factors, genetic factors are more important in explaining stability and comorbidity. The unequal structure of genetic and environmental factors leads to a mismatch between the observed comorbidity between PDs and mental disorders and the expected commonality in genetic factors. Aggregation of symptoms and disorders according to the estimated genetic structure could improve the precision of molecular genetic studies. This longitudinal twin study has also shown that PDs are related to stressful life events, mental disorders, and substance abuse over and beyond what can be explained by genetic risk.

• Prydz, Monica Beer; Czajkowski, Nikolai Olavi; Eilertsen, Maja & Nes, Ragnhild Bang (2022). Helsekompetansens kraft i folkehelsearbeidet. Hvordan kan helsekompetanse innlemmes i folkehelsearbeid?
• Prydz, Monica Beer (2022). Helsekompetansens kraft i folkehelsearbeidet. Hvordan kan helsekompetanse innlemmes i folkehelsearbeid?
• Prydz, Monica Beer; Czajkowski, Nikolai Olavi; Bang Nes, Ragnhild; Røysamb, Espen & Eilertsen, Maja (2022). Promoting wellbeing and preventing mental health problems: A randomized controlled trail of the Five Ways to Wellbeing Intervention .
• Bjørnsen, Hanne Nissen (2022). Helsekompetansens kraft i folkehelsearbeidet. Hvordan kan helsekompetanse innlemmes i folkehelsearbeid?
• Hansen, Thomas (2022). Ensom jul for en av fire. [Newspaper]. Agder Flekkefjords Tidende.
• Nes, Ragnhild Bang & Eilertsen, Maja Gunvor (2022). Helsekompetansens kraft i folkehelsearbeidet. Hvordan kan helsekompetanse innlemmes i folkehelsearbeid?
• Ayorech, Ziada (2022). Gransker familien for å finne nøkkelen til fødselsdepresjon. [Business/trade/industry journal]. Apollon.
• Gillespie Cheesman, Rosa Catherine (2022). The Sir Kenneth Mather Speech ‘Why we need families: From Mendel to sociogenomics’. Show summary

  https://www.youtube.com/watch?v=zP8hB4ijAEc

• Gillespie Cheesman, Rosa Catherine (2022). Why we need families in genomic research.
• Gillespie Cheesman, Rosa Catherine (2022). Gene-environment interactions and school achievement.
• Gillespie Cheesman, Rosa Catherine (2022). Interview for Genetics Unzipped podcast on genetics and education. Show summary

  https://geneticsunzipped.com/blog/2022/8/11/hap-pea-mendel

• Gillespie Cheesman, Rosa Catherine (2022). Gene-environment interactions and school achievement.
• Gillespie Cheesman, Rosa Catherine (2022). How interactions between ADHD and schools affect educational achievement.
• Ayorech, Ziada (2022). Diversifying Risk Prediction to Innovate Genetic and Environmental Models of Depression (DRIvE) .
• Ayorech, Ziada (2022). Intelligence.
• Ayorech, Ziada (2022). Biology and Behaviour.
• Ayorech, Ziada (2022). Genetic and Geographic risk for Maternal Depression— the idea, results, and future directions.
• Ayorech, Ziada (2022). The potential of genetic methods for mental health research.
• Eilertsen, Espen Moen; Cheesman, Rosa Catherine Gillespie; Ayorech, Ziada; Røysamb, Espen; Pingault, Jean-Baptiste & Njølstad, Pål Rasmus [Show all 11 contributors for this article] (2022). A trio-gcta study of indirect and direct genetic effects on hyperactivity, inattention, conduct problems, and oppositional-defiant behaviors.
• Hansen, Thomas (2022). Linn (36) har alltid følt seg "annerledes" på grunn av livsvalget sitt. [Internet]. Trønder-Avisa.
• Hansen, Thomas (2022). Tiltak for å redusere ensomhet - funker de, og for hvem? .
• Hansen, Thomas (2022). Henrik var så ensom at han ville tatt livet sitt. [Internet]. Halden arbeiderblad.
• Hansen, Thomas (2022). -Jeg kunne høre at jeg var heldig som hadde friheten, men det var bare veldig ensomt. [Internet]. Nettavisen.
• Hansen, Thomas (2022). Hvordan unngå ensomhet i julen? [Internet]. Oslomet forskningsnyheter.
• Hansen, Thomas (2022). Historier om et levd liv fra ungdom til alderdom. [Journal]. Obos-bladet.
• Hansen, Thomas (2022). Ensomhet i jula. [TV]. Dagsrevyen, NRK.
• von Soest, Tilmann (2022). Studio 2. [Radio]. P2.
• Smajlagic, Dinka; Tsotsi, Stella; Gjerdevik, Miriam; Page, Christian Magnus; Zayats, Tetyana & Austerberry, Chloe [Show all 14 contributors for this article] (2022). Parent-of-origin effects in childhood aggression.

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