Nikolai Olavi Czajkowski

Bilde av Nikolai Olavi Czajkowski
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Telefon +47 22845163
Rom S03-07
Treffetider Etter avtale
Brukernavn
Besøksadresse Forskningsveien 3A Harald Schjelderups hus 0373 Oslo
Postadresse Postboks 1094 Blindern 0317 Oslo
Emneord: Metode, Avdeling for metode arbeids- kultur- og sosialpsykologi, Personlighetspsykologi

Publikasjoner

  • Skaug, Eirunn; Czajkowski, Nikolai Olavi; Waaktaar, Trine & Torgersen, Svenn (2022). The relationship between life events and sense of coherence in adolescence. A longitudinal twin study. Journal of Research in Personality. ISSN 0092-6566. 99. doi: 10.1016/j.jrp.2022.104259. Fulltekst i vitenarkiv
  • 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), s. 365–374. doi: 10.1037/abn0000755.
  • 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. 00, s. 1–8. doi: 10.1111/cdoe.12763.
  • Eftedal, Nikolai Haahjem; Kleppestø, Thomas Haarklau; Czajkowski, Nikolai Olavi; Sheehy-Skeffington, Jennifer; Røysamb, Espen & Vassend, Olav Mandt [Vis alle 8 forfattere av denne artikkelen] (2022). Justice sensitivity is undergirded by separate heritable motivations to be morally principled and opportunistic. Scientific Reports. ISSN 2045-2322. 12. doi: 10.1038/s41598-022-09253-2. Fulltekst i vitenarkiv
  • Sælid, Gry Anette; Czajkowski, Nikolai Olavi; Aarø, Leif Edvard; Andersen, John Roger; Idsøe, Thormod & Helleseter, Miguel Delgado [Vis alle 7 forfattere av denne artikkelen] (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(14), s. 1–14. doi: 10.1186/s40359-022-00721-y. Fulltekst i vitenarkiv
  • Waraan, Luxsiya; Mehlum, Lars; Rognli, Erling W.; Czajkowski, Nikolai Olavi & Villabø, Marianne (2021). Associations between insecure attachment styles to parents and suicidal ideation in adolescents with depression . Scandinavian Journal of Child and Adolescent Psychiatry and Psychology. ISSN 2245-8875. 9, s. 41–51. doi: 10.21307/sjcapp-2021-006. Fulltekst i vitenarkiv
  • Glad, Kristin Alve; Stensland, Synne; Czajkowski, Nikolai Olavi; Boelen, Paul & Dyb, Grete Anita (2021). The Longitudinal Association Between Symptoms of Posttraumatic Stress and Complicated Grief: A Random Intercepts Cross-Lag Analysis. Psychological Trauma. ISSN 1942-9681. doi: 10.1037/tra0001087. Fulltekst i vitenarkiv
  • Waraan, Luxsiya; Rognli, Erling W.; Czajkowski, Nikolai Olavi; Villabø, Marianne & Mehlum, Lars (2021). Effectiveness of attachment-based family therapy compared to treatment as usual for depressed adolescents in community mental health clinics. Child and Adolescent Psychiatry and Mental Health (CAPMH). ISSN 1753-2000. 15, s. 1–14. doi: 10.1186/s13034-021-00361-x. Fulltekst i vitenarkiv
  • Ulset, Vidar; Czajkowski, Nikolai Olavi; Staton, Sally; Smith, Simon C.; Pattinson, Cassandra & Allen, Alicia [Vis alle 8 forfattere av denne artikkelen] (2021). Environmental Light Exposure, Rest-Activity Rhythms, and Symptoms of Inattention and Hyperactivity: An Observational Study of Australian Preschoolers. Journal of Environmental Psychology. ISSN 0272-4944. doi: 10.1016/j.jenvp.2021.101560.
  • Waraan, Luxsiya; Rognli, Erling W.; Czajkowski, Nikolai Olavi; Mehlum, Lars & Villabø, Marianne (2020). Efficacy of attachment-based family therapy compared to treatment as usual for suicidal ideation in adolescents with MDD. Clinical Child Psychology and Psychiatry. ISSN 1359-1045. doi: 10.1177/1359104520980776. Fulltekst i vitenarkiv
  • Czajkowski, Nikolai Olavi; Kendler, Kenneth S; Torvik, Fartein Ask; Ystrøm, Eivind; Rosenström, Tom Henrik & Gillespie, Nathan [Vis alle 7 forfattere av denne artikkelen] (2020). Caffeine consumption, toxicity, tolerance and withdrawal; shared genetic influences with normative personality and personality disorder traits. Experimental and clinical psychopharmacology. ISSN 1064-1297. doi: 10.1037/pha0000429. Fulltekst i vitenarkiv
  • Rognli, Erling W.; Aalberg, Marianne & Czajkowski, Nikolai Olavi (2020). Using informant discrepancies in report of parent–adolescent conflict to predict hopelessness in adolescent depression. Clinical Child Psychology and Psychiatry. ISSN 1359-1045. 26(1), s. 96–109. doi: 10.1177/1359104520969761. Fulltekst i vitenarkiv
  • Rognli, Erling W.; Waraan, Luxsiya; Czajkowski, Nikolai Olavi & Villabø, Marianne (2020). Moderation of treatment effects by parent-adolescent conflict in a randomised controlled trial of Attachment-Based Family Therapy for adolescent depression. Scandinavian Journal of Child and Adolescent Psychiatry and Psychology. ISSN 2245-8875. 8, s. 110–122. doi: 10.21307/sjcapp-2020-011. Fulltekst i vitenarkiv
  • Eilertsen, Espen Moen; Hannigan, Laurie John; McAdams, Tom A.; Rijsdijk, Frühling V.; Czajkowski, Nikolai Olavi & Reichborn-Kjennerud, Ted [Vis alle 8 forfattere av denne artikkelen] (2020). Parental Prenatal Symptoms of Depression and Offspring Symptoms of ADHD: A Genetically Informed Intergenerational Study. Journal of Attention Disorders. ISSN 1087-0547. doi: 10.1177/1087054720914386. Fulltekst i vitenarkiv
  • Rosenström, Tom Henrik; Torvik, Fartein Ask; Ystrøm, Eivind; Aggen, Steven H.; Gillespie, Nathan A. & Krueger, Robert F. [Vis alle 9 forfattere av denne artikkelen] (2020). Specific Antisocial and Borderline Personality Disorder Criteria and General Substance Use: A Twin Study. Personality Disorders: Theory, Research, and Treatment. ISSN 1949-2715. 12(3), s. 228–240. doi: 10.1037/per0000404.
  • Liu, Hang; Laeng, Bruno & Czajkowski, Nikolai Olavi (2020). Does stereopsis improve face identification? A study using a virtual reality display with integrated eye-tracking and pupillometry. Acta Psychologica. ISSN 0001-6918. 210. doi: 10.1016/j.actpsy.2020.103142. Fulltekst i vitenarkiv
  • Glad, Kristin Alve; Czajkowski, Nikolai Olavi; Dyb, Grete & Hafstad, Gertrud Sofie (2020). Does event centrality mediate the effect of peritraumatic reactions on post-traumatic growth in survivors of a terrorist attack? European Journal of Psychotraumatology. ISSN 2000-8066. 11(1). doi: 10.1080/20008198.2020.1766276. Fulltekst i vitenarkiv
  • Haukeland, Yngvild; Czajkowski, Nikolai Olavi; Fjermestad, Krister; Silverman, Wendy K.; Mossige, Svein & Vatne, Torun (2020). Evaluation of “SIBS”, An Intervention for Siblings and Parents of Children with Chronic Disorders. Journal of Child and Family Studies. ISSN 1062-1024. 29. doi: 10.1007/s10826-020-01737-x. Fulltekst i vitenarkiv
  • Siegel, Marte Langenes; Binder, Eva Mathilde Gullestad; Dahl, Hanne-Sofie Johnsen ; Czajkowski, Nikolai Olavi; Critchfield, Kenneth L. & Høglend, Per Andreas [Vis alle 7 forfattere av denne artikkelen] (2020). Therapeutic Atmosphere in Psychotherapy Sessions. International Journal of Environmental Research and Public Health (IJERPH). ISSN 1661-7827. 17(11). doi: 10.3390/ijerph17114105. Fulltekst i vitenarkiv
  • Gjerdevik, Miriam; Gjessing, Håkon K.; Romanowska, Julia; Haaland, Øystein Ariansen; Jugessur, Astanand & Czajkowski, Nikolai Olavi [Vis alle 7 forfattere av denne artikkelen] (2020). Design efficiency in genetic association studies. Statistics in Medicine. ISSN 0277-6715. 39, s. 1292–1310. doi: 10.1002/sim.8476. Fulltekst i vitenarkiv
  • Rognli, Erling Wright; Waraan, Luxsiya; Czajkowski, Nikolai Olavi; Solbakken, Ole Andre & Aalberg, Marianne (2020). Conflict with Parents in Adolescent Depression: Associations with Parental Interpersonal Problems and Depressive Symptoms. Child Psychiatry and Human Development. ISSN 0009-398X. 51, s. 442–452. doi: 10.1007/s10578-020-00955-0. Fulltekst i vitenarkiv
  • Kleppestø, Thomas Haarklau; Czajkowski, Nikolai Olavi; Vassend, Olav; Røysamb, Espen; Eftedal, Nikolai Haahjem & Sheehy-Skeffington, Jennifer [Vis alle 8 forfattere av denne artikkelen] (2019). Correlations between social dominance orientation and political attitudes reflect common genetic underpinnings. Proceedings of the National Academy of Sciences of the United States of America. ISSN 0027-8424. 116(36), s. 17741–17746. doi: 10.1073/pnas.1818711116. Fulltekst i vitenarkiv
  • Glad, Kristin Alve; Czajkowski, Nikolai Olavi; Dyb, Grete & Hafstad, Gertrud Sofie (2019). Cross-Lagged Association Between Symptoms of Posttraumatic Stress Disorder and Perceived Centrality of a Terrorist Attack. Clinical Psychological Science. ISSN 2167-7026. doi: 10.1177/2167702619873590. Fulltekst i vitenarkiv
  • Biele, Guido; Gustavson, Kristin; Czajkowski, Nikolai Olavi; Nilsen, Roy Miodini; Reichborn-Kjennerud, Ted & Magnus, Per [Vis alle 8 forfattere av denne artikkelen] (2019). Bias from self selection and loss to follow-up in prospective cohort studies. European Journal of Epidemiology (EJE). ISSN 0393-2990. 34(10), s. 927–938. doi: 10.1007/s10654-019-00550-1.
  • Ulset, Vidar; Czajkowski, Nikolai Olavi; Kraft, Brage; Kraft, Pål; Wikenius, Ellen & Kleppestø, Thomas Haarklau [Vis alle 7 forfattere av denne artikkelen] (2019). Are unpopular children more likely to get sick? Longitudinal links between popularity and infectious diseases in early childhood . PLOS ONE. ISSN 1932-6203. 14(9), s. 1–14. doi: 10.1371/journal.pone.0222222. Fulltekst i vitenarkiv
  • Kendler, Kenneth S.; Aggen, Steven H.; Gillespie, Nathan; Czajkowski, Nikolai Olavi; Ystrøm, Eivind & Reichborn-Kjennerud, Ted (2019). A twin study of cigarette and snus initiation and quantity of use in Norwegian Adult Twins. Twin Research and Human Genetics. ISSN 1832-4274. 22(2), s. 108–113. doi: 10.1017/thg.2019.9. Fulltekst i vitenarkiv
  • Torvik, Fartein Ask; Rosenström, Tom Henrik; Gustavson, Kristin; Ystrøm, Eivind; Kendler, Kenneth S. & Bramness, Jørgen Gustav [Vis alle 8 forfattere av denne artikkelen] (2019). Explaining the association between anxiety disorders and alcohol use disorder: A twin study. Depression and Anxiety. ISSN 1091-4269. 36(6), s. 522–532. doi: 10.1002/da.22886. Fulltekst i vitenarkiv
  • Kendler, Kenneth S.; Aggen, Steven H.; Gillespie, Nathan; Krueger, Robert F.; Czajkowski, Nikolai Olavi & Ystrøm, Eivind [Vis alle 7 forfattere av denne artikkelen] (2019). The structure of genetic and environmental influences on normative personality, abnormal personality traits, and personality disorder symptoms. Psychological Medicine. ISSN 0033-2917. 49(8), s. 1392–1399. doi: 10.1017/S0033291719000047.
  • Fu, Susie; Czajkowski, Nikolai Olavi & Torgalsbøen, Anne-Kari (2019). Cognitive, work and social outcomes in fully recovered first-episode schizophrenia: On and off antipsychotic medication. Psychiatry. ISSN 0033-2747. doi: 10.1080/00332747.2018.1550735.
  • Rosenström, Tom Henrik; Czajkowski, Nikolai Olavi; Ystrøm, Eivind; Krueger, Robert F; Aggen, Steven H & Gillespie, Nathan A [Vis alle 9 forfattere av denne artikkelen] (2019). Genetically Informative Mediation Modeling Applied to Stressors and Personality-Disorder Traits in Etiology of Alcohol Use Disorder. Behavior Genetics. ISSN 0001-8244. 49(1), s. 11–23. doi: 10.1007/s10519-018-9941-z.
  • Czajkowski, Nikolai Olavi; Aggen, Steven H.; Krueger, Robert F; Kendler, Kenneth S.; Neale, Michael C. & Knudsen, Gun Peggy [Vis alle 10 forfattere av denne artikkelen] (2018). A Twin Study of Normative Personality and DSM-IV Personality Disorder Criterion Counts: Evidence for Separate Genetic Influences. American Journal of Psychiatry. ISSN 0002-953X. 175(7), s. 649–656. doi: 10.1176/appi.ajp.2017.17050493.
  • Knutsen, Marie Lindebø; Czajkowski, Nikolai Olavi & Ormhaug, Silje Mørup (2018). Changes in posttraumatic stress symptoms, cognitions, and depression during treatment of traumatized youth. Behaviour Research and Therapy. ISSN 0005-7967. 111, s. 119–126. doi: 10.1016/j.brat.2018.10.010.
  • Rosenström, Tom Henrik; Gjerde, Line C.; Krueger, Robert Frederick; Aggen, Steven H.; Czajkowski, Nikolai Olavi & Gillespie, Nathan A. [Vis alle 10 forfattere av denne artikkelen] (2018). Joint factorial structure of psychopathology and personality. Psychological Medicine. ISSN 0033-2917. doi: 10.1017/S0033291718002982. Fulltekst i vitenarkiv
  • Røysamb, Espen; Nes, Ragnhild Bang; Czajkowski, Nikolai Olavi & Vassend, Olav (2018). Genetics, personality and wellbeing. A twin study of traits, facets and life satisfaction. Scientific Reports. ISSN 2045-2322. 8. doi: 10.1038/s41598-018-29881-x. Fulltekst i vitenarkiv
  • Vassend, Olav; Røysamb, Espen; Nielsen, Christopher Sivert & Czajkowski, Nikolai Olavi (2018). Fatigue symptoms in relation to neuroticism, anxiety-depression, and musculoskeletal pain. A longitudinal twin study. PLOS ONE. ISSN 1932-6203. 13(6). doi: 10.1371/journal.pone.0198594. Fulltekst i vitenarkiv
  • Fu, Susie; Czajkowski, Nikolai Olavi & Torgalsbøen, Anne-Kari (2018). Cognitive improvement in first-episode schizophrenia and healthy controls: A 6-year multi-assessment follow-up study. Psychiatry Research. ISSN 0165-1781. 267, s. 319–326. doi: 10.1016/j.psychres.2018.06.016.
  • Gillespie, Nathan A.; Aggen, Steven H.; Gentry, Amanda E.; Neale, Michael Churton; Knudsen, Gun Peggy S. & Krueger, Robert Frederick [Vis alle 14 forfattere av denne artikkelen] (2018). Testing Genetic and Environmental Associations Between Personality Disorders and Cocaine Use: A Population-Based Twin Study. Twin Research and Human Genetics. ISSN 1832-4274. 21(1), s. 24–32. doi: 10.1017/thg.2017.73. Fulltekst i vitenarkiv
  • Gillespie, Nathan A.; Aggen, Steven H.; Neale, Michael C.; Knudsen, Gun Peggy S.; Krueger, Robert F. & South, Susan C. [Vis alle 11 forfattere av denne artikkelen] (2018). Associations between personality disorders and cannabis use and cannabis use disorder: a population‐based twin study. Addiction. ISSN 0965-2140. 113(8), s. 1488–1498. doi: 10.1111/add.14209.
  • Welander-Vatn, Audun; Torvik, Fartein Ask; Czajkowski, Nikolai Olavi; Kendler, Kenneth S; Reichborn-Kjennerud, Ted & Knudsen, Gun Peggy S. [Vis alle 7 forfattere av denne artikkelen] (2018). Relationships Among Avoidant Personality Disorder, Social Anxiety Disorder, and Normative Personality Traits: A Twin Study. Journal of Personality Disorders. ISSN 0885-579X. 33(3), s. 289–309. doi: 10.1521/pedi_2018_32_341.
  • Torgalsbøen, Anne-Kari; Fu, Susie & Czajkowski, Nikolai Olavi (2018). Resilience trajectories to full recovery in first-episode schizophrenia. European psychiatry. ISSN 0924-9338. 52, s. 54–60. doi: 10.1016/j.eurpsy.2018.04.007. Fulltekst i vitenarkiv
  • Rosenström, Tom Henrik; Torvik, Fartein Ask; Ystrøm, Eivind; Czajkowski, Nikolai Olavi; Gillespie, Nathan A. & Aggen, Steven H. [Vis alle 9 forfattere av denne artikkelen] (2018). Prediction of alcohol use disorder using personality disorder traits: a twin study. Addiction. ISSN 0965-2140. 113(1), s. 15–24. doi: 10.1111/add.13951.
  • Øie, Merete Glenne; Hovik, Kjell Tore; Andersen, Per Normann; Czajkowski, Nikolai Olavi & Skogli, Erik Winther (2018). Gender differences in the relationship between changes in ADHD symptoms, executive function, and self- and parent-report depression symptoms in boys and girls with ADHD: A two-year follow-up study. Journal of Attention Disorders. ISSN 1087-0547. 22(5), s. 446–459. doi: 10.1177/1087054716664407.
  • Torvik, Fartein Ask; Rosenström, Tom Henrik; Ystrøm, Eivind; Tambs, Kristian; Røysamb, Espen & Czajkowski, Nikolai Olavi [Vis alle 10 forfattere av denne artikkelen] (2017). Stability and change in etiological factors for alcohol use disorder and major depression. Journal of Abnormal Psychology. ISSN 0021-843X. 126(6), s. 812–822. doi: 10.1037/abn0000280. Fulltekst i vitenarkiv
  • Fu, Susie; Czajkowski, Nikolai Olavi; Rund, Bjørn Rishovd & Torgalsbøen, Anne-Kari (2017). The relationship between level of cognitive impairments and functional outcome trajectories in first-episode schizophrenia. Schizophrenia Research. ISSN 0920-9964. 190, s. 144–149. doi: 10.1016/j.schres.2017.03.002. Fulltekst i vitenarkiv
  • Rosenström, Tom Henrik; Ystrøm, Eivind; Torvik, Fartein Ask; Czajkowski, Nikolai Olavi; Gillespie, Nathan A. & Aggen, Steven H. [Vis alle 9 forfattere av denne artikkelen] (2017). Genetic and Environmental Structure of DSM-IV Criteria for Antisocial Personality Disorder: A Twin Study. Behavior Genetics. ISSN 0001-8244. 47(3), s. 265–277. doi: 10.1007/s10519-016-9833-z.
  • Reichborn-Kjennerud, Ted; Krueger, R F; Ystrøm, Eivind; Torvik, Fartein Ask; Rosenström, Tom Henrik & Aggen, S H [Vis alle 11 forfattere av denne artikkelen] (2017). Do DSM-5 Section II personality disorders and Section III personality trait domains reflect the same genetic and environmental risk factors? Psychological Medicine. ISSN 0033-2917. 47(12), s. 2205–2215. doi: 10.1017/S0033291717000824.
  • Eilertsen, Espen Moen; Gjerde, Line C.; Reichborn-Kjennerud, Ted; Ørstavik, Ragnhild; Knudsen, Gun Peggy & Stoltenberg, Camilla [Vis alle 10 forfattere av denne artikkelen] (2017). Maternal alcohol use during pregnancy and offspring attention-deficit hyperactivity disorder (ADHD): a prospective sibling control study. International Journal of Epidemiology. ISSN 0300-5771. 46(5), s. 1633–1640. doi: 10.1093/ije/dyx067. Fulltekst i vitenarkiv
  • Long, Elizabeth C.; Aggen, Steven H.; Neale, Michael Churton; Knudsen, Gun Peggy; Krueger, Robert Frederick & South, Susan Carol [Vis alle 13 forfattere av denne artikkelen] (2017). The association between personality disorders with alcohol use and misuse: A population-based twin study. Drug and Alcohol Dependence. ISSN 0376-8716. 174, s. 171–180. doi: 10.1016/j.drugalcdep.2017.01.022.
  • Vassend, Olav; Røysamb, Espen; Nielsen, Christopher Sivert & Czajkowski, Nikolai Olavi (2017). Musculoskeletal Complaints, Anxiety–Depression Symptoms, and Neuroticism: A Study of Middle-Aged Twins. Health Psychology. ISSN 0278-6133. 36(8), s. 729–739. doi: 10.1037/hea0000484.
  • South, Susan C; Krueger, Robert F; Knudsen, Gun Peggy; Ystrøm, Eivind; Czajkowski, Nikolai Olavi & Aggen, Steven H [Vis alle 10 forfattere av denne artikkelen] (2017). A Population Based Twin Study of DSM–5 Maladaptive Personality Domains. Personality Disorders: Theory, Research, and Treatment. ISSN 1949-2715. 8(4), s. 366–375. doi: 10.1037/per0000220.
  • Tornare, Elise; Cuisinier, F.; Czajkowski, Nikolai Olavi & Pons, Francisco (2017). Impact of Induced Joy on Literacy in Children: Does the Nature of the Task Make a Difference? Cognition & Emotion. ISSN 0269-9931. 31(3), s. 500–510. doi: 10.1080/02699931.2015.1132682.
  • Kendler, Kenneth S; Aggen, Steven H; Gillespie, Nathan; Neale, Michael C; Knudsen, Gun Peggy & Krueger, Robert F [Vis alle 9 forfattere av denne artikkelen] (2017). The Genetic and Environmental Sources of Resemblance Between Normative Personality and Personality Disorder Traits. Journal of Personality Disorders. ISSN 0885-579X. 31(2), s. 193–207. doi: 10.1521/pedi_2016_30_251.
  • Tornare, Elise; Czajkowski, Nikolai Olavi & Pons, Francisco (2016). Impact of emotion on children´s performance in a dictation task: Evidence for a direct effect of the emotional content. Annee Psychologique. ISSN 0003-5033. 116(2), s. 171–201. doi: 10.4074/s0003503316000312.
  • Østby, Kristian Amundsen; Czajkowski, Nikolai Olavi; Knudsen, Gun Peggy; Ystrøm, Eivind; Gjerde, Line C. & Kendler, Kenneth S. [Vis alle 8 forfattere av denne artikkelen] (2016). Does low alcohol use increase the risk of sickness absence? A discordant twin study. BMC Public Health. ISSN 1471-2458. 16. doi: 10.1186/s12889-016-3502-2. Fulltekst i vitenarkiv
  • Nilsen, Thomas Sevenius; Brandt, Ingunn; Czajkowski, Nikolai Olavi; Knudsen, Gun Peggy; Magnus, Per & Reichborn-Kjennerud, Ted [Vis alle 9 forfattere av denne artikkelen] (2016). The Norwegian twin registry. Norsk Epidemiologi. ISSN 0803-2491. 26(1-2), s. 19–27. doi: 10.5324/nje.v26i1-2.2012. Fulltekst i vitenarkiv
  • Sælid, Gry Anette; Czajkowski, Nikolai Olavi; Holte, Arne; Tambs, Kristian & Aarø, Leif Edvard (2016). Positive mental health effects of the Coping With Strain (CWS) course on employees: a four-year longitudinal randomized controlled trial. International Journal of Mental Health Promotion. ISSN 1462-3730. 18(3), s. 158–175. doi: 10.1080/14623730.2016.1196231.
  • Vassend, Olav; Orvik, Benedicte Humborstad; Czajkowski, Nikolai Olavi & Røysamb, Espen (2016). Facets of neuroticism and musculoskeletal symptoms. A study of middle-aged twins. Norsk Epidemiologi. ISSN 0803-2491. 26(1-2), s. 47–56. doi: 10.5324/nje.v26i1-2.2015.
  • Gjerde, Line C.; Torvik, Fartein Ask; Østby, Kristian Amundsen; Knudsen, Gun Peggy; Czajkowski, Nikolai Olavi & Reichborn-Kjennerud, Ted [Vis alle 7 forfattere av denne artikkelen] (2016). Advantages of linking national registries with twin registries for epidemiological research. Norsk Epidemiologi. ISSN 0803-2491. 26(1-2), s. 83–92. doi: 10.5324/nje.v26i1-2.2020.
  • Sælid, Gry Anette; Czajkowski, Nikolai Olavi; Holte, Arne; Tambs, Kristian & Aarø, Leif Edvard (2016). Coping With Strain (CWS) course – its effects on depressive symptoms: A four-year longitudinal randomized controlled trial. Scandinavian Journal of Psychology. ISSN 0036-5564. 57(4), s. 321–327. doi: 10.1111/sjop.12289.
  • Bekkhus, Mona; Brendgen, Mara; Czajkowski, Nikolai Olavi; Vitaro, Frank; Dionne, Ginette & Boivin, Michel (2016). Associations between Sibling Relationship Quality and Friendship Quality in Early Adolescence: Looking at the Case of Twins. Twin Research and Human Genetics. ISSN 1832-4274. 19(2), s. 125–135. doi: 10.1017/thg.2016.9.
  • Torvik, Fartein Ask; Vatn, Audun Svendsen; Ystrøm, Eivind; Knudsen, Gun Peggy; Czajkowski, Nikolai Olavi & Kendler, Kenneth S. [Vis alle 7 forfattere av denne artikkelen] (2016). Longitudinal Associations Between Social Anxiety Disorder and Avoidant Personality Disorder: A Twin Study. Journal of Abnormal Psychology. ISSN 0021-843X. 125(1), s. 114–124. doi: 10.1037/abn0000124.
  • Reichborn-Kjennerud, Ted; Czajkowski, Nikolai Olavi; Ystrøm, Eivind; Ørstavik, Ragnhild; Aggen, Steven H. & Tambs, Kristian [Vis alle 12 forfattere av denne artikkelen] (2015). A longitudinal twin study of borderline and antisocial personality disorder traits in early to middle adulthood. Psychological Medicine. ISSN 0033-2917. 45(14), s. 3121–3131. doi: 10.1017/S0033291715001117.
  • Gjerde, Line C.; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ystrøm, Eivind; Tambs, Kristian & Aggen, Steven H. [Vis alle 10 forfattere av denne artikkelen] (2015). A longitudinal, population-based twin study of avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood. Psychological Medicine. ISSN 0033-2917. 45(16), s. 3539–3548. doi: 10.1017/S0033291715001440.
  • Tornare, Elise; Czajkowski, Nikolai Olavi & Pons, Francisco (2015). Children's emotions in math problem solving situations: Contributions of self-concept, metacognitive experiences, and performance. Learning and Instruction. ISSN 0959-4752. 39, s. 88–96. doi: 10.1016/j.learninstruc.2015.05.011.
  • Torvik, Fartein Ask; Ystrøm, Eivind; Czajkowski, Nikolai Olavi; Tambs, Kristian; Røysamb, Espen & Ørstavik, Ragnhild [Vis alle 9 forfattere av denne artikkelen] (2015). Socioeconomic status and sick leave granted for mental and somatic disorders: a prospective study of young adult twins. BMC Public Health. ISSN 1471-2458. 15:134. doi: 10.1186/s12889-015-1457-3. Fulltekst i vitenarkiv
  • Torgalsbøen, Anne-Kari; Mohn, Christine; Czajkowski, Nikolai Olavi & Rund, Bjørn Rishovd (2015). Relationship between neurocognition and functional recovery in first-episode schizophrenia: Results from the second year of the Oslo multi-follow-up study. Psychiatry Research. ISSN 0165-1781. 227(2-3), s. 185–191. doi: 10.1016/j.psychres.2015.03.037.
  • Kendler, Kenneth S.; Aggen, SH; Neale, MC; Knudsen, Gun Peggy; Krueger, Robert F & Tambs, Kristian [Vis alle 10 forfattere av denne artikkelen] (2015). A longitudinal twin study of cluster A personality disorders. Psychological Medicine. ISSN 0033-2917. 45(7), s. 1531–1538. doi: 10.1017/S0033291714002669.
  • Ørstavik, Ragnhild; Czajkowski, Nikolai Olavi; Røysamb, Espen; Knudsen, Gun Peggy; Tambs, Kristian & Reichborn-Kjennerud, Ted (2014). Sex differences in genetic and environmental influences on educational attainment and income. Twin Research and Human Genetics. ISSN 1832-4274. 17(6), s. 516–525. doi: 10.1017/thg.2014.68.
  • Østby, Kristian Amundsen; Czajkowski, Nikolai; Knudsen, Gun Peggy; Ystrøm, Eivind; Gjerde, Line C. & Kendler, Kenneth S. [Vis alle 8 forfattere av denne artikkelen] (2014). Personality disorders are important risk factors for disability pensioning. Social Psychiatry and Psychiatric Epidemiology. ISSN 0933-7954. 49(12), s. 2003–2011. doi: 10.1007/s00127-014-0878-0.
  • Torvik, Fartein Ask; Gjerde, Line Cecilie; Røysamb, Espen; Tambs, Kristian; Kendler, Kenneth S. & Czajkowski, Nikolai Olavi [Vis alle 9 forfattere av denne artikkelen] (2014). Genetic and environmental contributions to the relationship between internalizing disorders and sick leave granted for mental and somatic disorders. Twin Research and Human Genetics. ISSN 1832-4274. 17(4), s. 225–235. doi: 10.1017/thg.2014.27.
  • Gjerde, Line Cecilie; Røysamb, Espen; Czajkowski, Nikolai Olavi; Knudsen, Gun Peggy; Østby, Kristian Amundsen & Tambs, Kristian [Vis alle 9 forfattere av denne artikkelen] (2014). Personality disorders and long-term sick leave: A population-based study of young adult norwegian twins. Twin Research and Human Genetics. ISSN 1832-4274. 17(1), s. 1–9. doi: 10.1017/thg.2013.90.

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  • Torgalsbøen, Anne Kari & Czajkowski, Nikolai Olavi (2022). Full recovery and self-efficacy in first episode schizophrenia: The OSR cohort at 10 year follow-up.
  • Siegel, Marte Langenes; Binder, Eva Mathilde Gullestad; Dahl, Hanne-Sofie Johnsen ; Czajkowski, Nikolai Olavi; Critchfield, Kenneth L. & Høglend, Per Andreas [Vis alle 7 forfattere av denne artikkelen] (2020). Erratum: Therapeutic atmosphere in psychotherapy sessions. int. j. environ. res. public health 2020, 17, 4105. International Journal of Environmental Research and Public Health (IJERPH). ISSN 1661-7827. 17(14), s. 1–2. doi: 10.3390/ijerph17145241.
  • Glad, Kristin Alve; Stensland, Synne; Czajkowski, Nikolai Olavi; Boelen, Paul & Dyb, Grete (2020). The longitudinal association between symptoms of posttraumatic stress and complicated grief. A random intercepts cross-lag analysis.
  • Glad, Kristin Alve; Stensland, Synne; Czajkowski, Nikolai Olavi; Boelen, Paul & Dyb, Grete (2019). The longitudinal association between complicated grief and symptoms of posttraumatic stress. A random-intercept cross-lag analysis.
  • Rognli, Erling W.; Villabø, Marianne & Czajkowski, Nikolai Olavi (2019). Discrepant Reports of Parent-adolescent Conflict is Associated with Hopelessness in Adolescent Depression.
  • Kleppestø, Thomas Haarklau; Czajkowski, Nikolai Olavi; Vassend, Olav; Røysamb, Espen; Eftedal, Nikolai Haahjem & Kunst, Jonas R. [Vis alle 8 forfattere av denne artikkelen] (2019). Social dominance orientation has both genetic and unique environmental influences, but only genetic pleiotropy accounts for its correlation with political attitudes.
  • Waraan, Luxsiya; Rognli, Erling W.; Mehlum, Lars; Czajkowski, Nikolai Olavi & Villabø, Marianne (2019). The efficacy of psychotherapy for suicidal ideation in youth.
  • Waraan, Luxsiya; Rognli, Erling W.; Mehlum, Lars; Czajkowski, Nikolai Olavi & Villabø, Marianne (2018). The association between Attachment Style to Father and Suicidal Ideation in Adolescents with Depression. .
  • Eilertsen, Espen Moen; Hannigan, Laurie John; McAdams, Tom A.; Rijsdijk, Fruhling; Czajkowski, Nikolai Olavi & Reichborn-Kjennerud, Ted [Vis alle 8 forfattere av denne artikkelen] (2018). Parental prenatal depression and offspring ADHD: a genetically informed intergenerational study. Behavior Genetics. ISSN 0001-8244. s. 469–469.
  • Eilertsen, Espen Moen; Hannigan, Laurie John; Mcadams, Tom; Rijsdijk, Fruhling; Czajkowski, Nikolai Olavi & Reichborn-Kjennerud, Ted [Vis alle 8 forfattere av denne artikkelen] (2018). Parental prenatal depression and offspring ADHD: A genetically informed intergenerational study.
  • Rosenström, Tom Henrik; Czajkowski, Nikolai Olavi; Ystrøm, Eivind; Krueger, RF; Aggen, Steven H. & Gillespie, Nathan A. [Vis alle 9 forfattere av denne artikkelen] (2017). Stressful life events, antisocial and borderline personality traits, and alcohol use disorder: a genetically informative mediation study.
  • H. Kleppestø, Thomas; Czajkowski, Nikolai Olavi; Vassend, Olav; Røysamb, Espen; R. Kunst, Jonas & Thomsen, Lotte (2017). Preferring domination or egalitarianism: Genetic and environmental structure of Social Dominance Orientation.
  • Czajkowski, Nikolai Olavi; Bang Nes, Ragnhild; Vassend, Olav & Røysamb, Espen (2017). Effects of somatic and mental illness on subjective well-being. A discordant twin analysis.
  • Røysamb, Espen; Bang Nes, Ragnhild; Czajkowski, Nikolai Olavi & Vassend, Olav (2017). Anxiety, depression and life satisfaction after midlife. A twin study across 20 years.
  • Bang Nes, Ragnhild; Czajkowski, Nikolai Olavi; Røysamb, Espen & Vassend, Olav (2017). Components and sources of well-being and ill-being: A twin study.
  • Vassend, Olav; Nielsen, Christopher Sivert; Røysamb, Espen & Czajkowski, Nikolai Olavi (2017). Fatigue symptoms in relation to neuroticism, anxiety-depression, and musculoskeletal pain. A longitudinal study.
  • Torvik, Fartein Ask; Rosenström, Tom Henrik; Czajkowski, Nikolai Olavi; long, elizabeth; Gillespie, Nathan A. & Reichborn-Kjennerud, Ted (2017). Results from a longitudinal twin study combining diagnostic interviews and registry data on personality, mental disorders, and substance use.
  • Torgalsbøen, Anne-Kari; Fu, Susie & Czajkowski, Nikolai Olavi (2016). Resilience trajectories in fully recovered first-episode psychosis patients.
  • Czajkowski, Nikolai Olavi; Aggen, Steven H.; Knudsen, Gun Peggy; Krueger, Robert F; Neale, Michael C. & Ystrøm, Eivind [Vis alle 9 forfattere av denne artikkelen] (2015). Modest overlap in the genetic influences underlying normal and abnormal personality.
  • Torvik, Fartein Ask; Welander-Vatn, Audun; Ystrøm, Eivind; Knudsen, Gun Peggy; Czajkowski, Nikolai Olavi & Kendler, Kenneth S. [Vis alle 7 forfattere av denne artikkelen] (2015). Ten-year stability of avoidant personality disorder and social anxiety disorder: A twin study.
  • Ystrøm, Eivind; Reichborn-Kjennerud, Ted; Gillespie, Nathan; Torvik, Fartein Ask; Czajkowski, Nikolai Olavi & Krueger, Robert F [Vis alle 8 forfattere av denne artikkelen] (2015). Psychosis, mania and personality disorders.
  • Gjerde, Line C.; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ystrøm, Eivind; Tambs, Kristian & Aggen, Steven H. [Vis alle 10 forfattere av denne artikkelen] (2015). Avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood.
  • Reichborn-Kjennerud, Ted; Czajkowski, Nikolai Olavi; Ystrøm, Eivind; Ørstavik, Ragnhild; Aggen, Steven H. & Tambs, Kristian [Vis alle 12 forfattere av denne artikkelen] (2015). Borderline and antisocial personality disorder traits in early to middle adulthood: A longitudinal twin study.
  • Gjerde, Line C.; Czajkowski, Nikolai Olavi; Røysamb, Espen; Ystrøm, Eivind; Tambs, Kristian & Aggen, Steven H. [Vis alle 10 forfattere av denne artikkelen] (2015). Avoidant and obsessive-compulsive personality disorder traits from early to middle adulthood.
  • Villabø, Marianne Aalberg & Czajkowski, Nikolai Olavi (2014). The role of comorbidity in long-term outcome of CBT for anxiety disorders in children.
  • Villabø, Marianne Aalberg & Czajkowski, Nikolai Olavi (2014). Two-year naturalistic follow-up of children treated for anxiety disorders.
  • Glad, Kristin Alve; Hafstad, Gertrud Sofie; Dyb, Grete & Czajkowski, Nikolai Olavi (2020). Transformed by trauma. A longitudinal study of posttraumatic stress, growth and perceived event centrality among youths and emerging adults after the terrorist attack on Utøya island . Damnett.
  • Rognli, Erling W.; Villabø, Marianne & Czajkowski, Nikolai Olavi (2020). Conflict with Parents in Adolescent Depression. Universitetet i Oslo. ISSN 1504-3991. Fulltekst i vitenarkiv

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Publisert 31. jan. 2012 13:27 - Sist endret 8. juli 2019 13:45