Publications 2024

Blix I, Glad KA, Undset A, Wentzel-Larsen T, Ottesen AA, Jensen TK, Dyb G (2024)
'My child could have died': counterfactual thoughts and psychological distress in parents of trauma survivors
Eur J Psychotraumatol, 15 (1), 2326736
DOI 10.1080/20008066.2024.2326736, PubMed 38506895

Stangeland H, Aakvaag HF, Baumann-Larsen M, Wentzel-Larsen T, Ottesen A, Zwart JA, Storheim K, Dyb G, Stensland SØ (2024)
Prevalence and risk of psychiatric disorders in young people: prospective cohort study exploring the role of childhood trauma (the HUNT study)
Br J Psychiatry, 225 (5), 476-483
DOI 10.1192/bjp.2024.98, PubMed 39114956

Sætren SS, Bjørnestad JR, Ottesen AA, Fisher HL, Olsen DAS, Hølland K, Hegelstad WTV (2024)
Unraveling the Concept of Childhood Adversity in Psychosis Research: A Systematic Review
Schizophr Bull, 50 (5), 1055-1066
DOI 10.1093/schbul/sbae085, PubMed 38811352

Wold KF, Ottesen A, Flaaten CB, Kreis I, Lagerberg TV, Romm KL, Simonsen C, Widing L, Åsbø G, Melle I (2024)
Childhood trauma and treatment resistance in first-episode psychosis: Investigating the role of premorbid adjustment and duration of untreated psychosis
Schizophr Res, 270, 441-450
DOI 10.1016/j.schres.2024.07.001, PubMed 38991420

Publications 2023

Lunding SH, Ueland T, Aas M, Høegh MC, Werner MCF, Rødevand L, Johansen IT, Hjell G, Ormerod MBEG, Ringen PA, Ottesen A, Lagerberg TV, Melle I, Andreassen OA, Simonsen C, Steen NE (2023)
Tobacco smoking related to childhood trauma mediated by cognitive control and impulsiveness in severe mental disorders
Schizophr Res, 261, 236-244
DOI 10.1016/j.schres.2023.09.041, PubMed 37806047

Wold KF, Ottesen A, Camilla BF, Johnsen E, Lagerberg TV, Romm KL, Simonsen C, Ueland T, Widing L, Åsbø G, Melle I (2023)
Early identification of treatment non-response in first-episode psychosis
Eur Psychiatry, 66 (1), e30
DOI 10.1192/j.eurpsy.2023.15, PubMed 36915260

Publications 2022

Løkhammer S, Stavrum AK, Polushina T, Aas M, Ottesen AA, Andreassen OA, Melle I, Le Hellard S (2022)
An epigenetic association analysis of childhood trauma in psychosis reveals possible overlap with methylation changes associated with PTSD
Transl Psychiatry, 12 (1), 177
DOI 10.1038/s41398-022-01936-8, PubMed 35501310

Publications 2021

Hegelstad WTV, Berg AO, Bjornestad J, Gismervik K, Johannessen JO, Melle I, Stain HJ, Joa I (2021)
Childhood interpersonal trauma and premorbid social adjustment as predictors of symptom remission in first episode psychosis
Schizophr Res, 232, 87-94
DOI 10.1016/j.schres.2021.05.015, PubMed 34029946

Ottesen A, T V Hegelstad W, Joa I, Opjordsmoen SE, Rund BR, Røssberg JI, Simonsen E, Johannessen JO, Larsen TK, Haahr UH, McGlashan TH, Friis S, Melle I (2021)
Childhood trauma, antipsychotic medication, and symptom remission in first-episode psychosis
Psychol Med, 53 (6), 2399-2408
DOI 10.1017/S003329172100427X, PubMed 37144963

Takizawa N, Melle I, Barrett EA, Nerhus M, Ottesen AA (2021)
The Influence of Mental Health Literacy, Migration, and Education on the Duration of Untreated Psychosis
Front Public Health, 9, 705397
DOI 10.3389/fpubh.2021.705397, PubMed 34368068

Publications 2020

Laskemoen JF, Aas M, Vaskinn A, Berg AO, Lunding SH, Barrett EA, Melle I, Simonsen C (2020)
Sleep disturbance mediates the link between childhood trauma and clinical outcome in severe mental disorders
Psychol Med, 51 (14), 2337-2346
DOI 10.1017/S0033291720000914, PubMed 32321600

Vaskinn A, Melle I, Aas M, Berg AO (2020)
Sexual abuse and physical neglect in childhood are associated with affective theory of mind in adults with schizophrenia
Schizophr Res Cogn, 23, 100189
DOI 10.1016/j.scog.2020.100189, PubMed 33134093

Publications 2018

Berg AO, Jørgensen KN, Nerhus M, Athanasiu L, Popejoy AB, Bettella F, Norbom LCB, Gurholt TP, Dahl SR, Andreassen OA, Djurovic S, Agartz I, Melle I (2018)
Vitamin D levels, brain volume, and genetic architecture in patients with psychosis
PLoS One, 13 (8), e0200250
DOI 10.1371/journal.pone.0200250, PubMed 30142216

Gurholt TP, Nerhus M, Osnes K, Berg AO, Andreassen OA, Melle I, Agartz I (2018)
Hippocampus volume reduction in psychosis spectrum could be ameliorated by vitamin D
Schizophr Res, 199, 433-435
DOI 10.1016/j.schres.2018.03.011, PubMed 29555212

Gurholt TP, Osnes K, Nerhus M, Jørgensen KN, Lonning V, Berg AO, Andreassen OA, Melle I, Agartz I (2018)
Vitamin D, Folate and the Intracranial Volume in Schizophrenia and Bipolar Disorder and Healthy Controls
Sci Rep, 8 (1), 10817
DOI 10.1038/s41598-018-29141-y, PubMed 30018414

Publications 2017

Nerhus M, Berg AO, Simonsen C, Haram M, Haatveit B, Dahl SR, Gurholt TP, Bjella TD, Ueland T, Andreassen OA, Melle I (2017)
Vitamin D Deficiency Associated With Cognitive Functioning in Psychotic Disorders
J Clin Psychiatry, 78 (7), e750-e757
DOI 10.4088/JCP.16m10880, PubMed 28493652

Simonsen C, Faerden A, Romm KL, Berg AO, Bjella T, Sundet K, Ueland T, Andreassen O, Melle I (2017)
Early clinical recovery in first-episode psychosis: Symptomatic remission and its correlates at 1-year follow-up
Psychiatry Res, 254, 118-125
DOI 10.1016/j.psychres.2017.04.050, PubMed 28460281

Walton E, Hibar DP, van Erp TG, Potkin SG, Roiz-Santiañez R, Crespo-Facorro B, Suarez-Pinilla P, Van Haren NE, de Zwarte SM, Kahn RS, Cahn W, Doan NT, Jørgensen KN, Gurholt TP, Agartz I, Andreassen OA, Westlye LT, Melle I, Berg AO, Mørch-Johnsen L, Faerden A, Flyckt L, Fatouros-Bergman H, Karolinska Schizophrenia Project Consortium (KaSP), Jönsson EG et al. (2017)
Positive symptoms associate with cortical thinning in the superior temporal gyrus via the ENIGMA Schizophrenia consortium
Acta Psychiatr Scand, 135 (5), 439-447
DOI 10.1111/acps.12718, PubMed 28369804

Walton E, Hibar DP, van Erp TGM, Potkin SG, Roiz-Santiañez R, Crespo-Facorro B, Suarez-Pinilla P, van Haren NEM, de Zwarte SMC, Kahn RS, Cahn W, Doan NT, Jørgensen KN, Gurholt TP, Agartz I, Andreassen OA, Westlye LT, Melle I, Berg AO, Morch-Johnsen L, Færden A, Flyckt L, Fatouros-Bergman H, Karolinska Schizophrenia Project Consortium (KaSP), Jönsson EG et al. (2017)
Prefrontal cortical thinning links to negative symptoms in schizophrenia via the ENIGMA consortium
Psychol Med, 48 (1), 82-94
DOI 10.1017/S0033291717001283, PubMed 28545597

Østefjells T, Lystad JU, Berg AO, Hagen R, Loewy R, Sandvik L, Melle I, Røssberg JI (2017)
Metacognitive beliefs mediate the effect of emotional abuse on depressive and psychotic symptoms in severe mental disorders
Psychol Med, 47 (13), 2323-2333
DOI 10.1017/S0033291717000848, PubMed 28397634

Publications 2016

Berg AO, Melle I, Zuber V, Simonsen C, Nerhus M, Ueland T, Andreassen OA, Sundet K, Vaskinn A (2016)
Modelling difficulties in abstract thinking in psychosis: the importance of socio-developmental background
Cogn Neuropsychiatry, 22 (1), 39-52
DOI 10.1080/13546805.2016.1259998, PubMed 28005457

Kaufmann T, Alnæs D, Brandt CL, Doan NT, Kauppi K, Bettella F, Lagerberg TV, Berg AO, Djurovic S, Agartz I, Melle IS, Ueland T, Andreassen OA, Westlye LT (2016)
Task modulations and clinical manifestations in the brain functional connectome in 1615 fMRI datasets
Neuroimage, 147, 243-252
DOI 10.1016/j.neuroimage.2016.11.073, PubMed 27916665

Nerhus M, Berg AO, Kvitland LR, Dieset I, Hope S, Dahl SR, Weibell MA, Romm KL, Faerden A, Andreassen OA, Melle I (2016)
Low vitamin D is associated with negative and depressive symptoms in psychotic disorders
Schizophr Res, 178 (1-3), 44-49
DOI 10.1016/j.schres.2016.08.024, PubMed 27595553

Aas M, Andreassen OA, Aminoff SR, Færden A, Romm KL, Nesvåg R, Berg AO, Simonsen C, Agartz I, Melle I (2016)
A history of childhood trauma is associated with slower improvement rates: Findings from a one-year follow-up study of patients with a first-episode psychosis
BMC Psychiatry, 16, 126
DOI 10.1186/s12888-016-0827-4, PubMed 27146044

Publications 2015

Berg AO, Barrett EA, Nerhus M, Büchman C, Simonsen C, Faerden A, Andreassen OA, Melle I (2015)
Psychosis: clinical insight and beliefs in immigrants in their first episode
Early Interv Psychiatry, 12 (2), 185-192
DOI 10.1111/eip.12297, PubMed 26663787

Nerhus M, Berg AO, Dahl SR, Holvik K, Gardsjord ES, Weibell MA, Bjella TD, Andreassen OA, Melle I (2015)
Vitamin D status in psychotic disorder patients and healthy controls--The influence of ethnic background
Psychiatry Res, 230 (2), 616-21
DOI 10.1016/j.psychres.2015.10.015, PubMed 26500071

Publications 2014

Berg AO, Andreassen OA, Aminoff SR, Romm KL, Hauff E, Melle I (2014)
The impact of immigration and visible minority status on psychosis symptom profile
Soc Psychiatry Psychiatr Epidemiol, 49 (11), 1747-57
DOI 10.1007/s00127-014-0897-x, PubMed 24927946

Publications 2013

Aminoff SR, Hellvin T, Lagerberg TV, Berg AO, Andreassen OA, Melle I (2013)
Neurocognitive features in subgroups of bipolar disorder
Bipolar Disord, 15 (3), 272-83
DOI 10.1111/bdi.12061, PubMed 23521608

Hope S, Ueland T, Steen NE, Dieset I, Lorentzen S, Berg AO, Agartz I, Aukrust P, Andreassen OA (2013)
Interleukin 1 receptor antagonist and soluble tumor necrosis factor receptor 1 are associated with general severity and psychotic symptoms in schizophrenia and bipolar disorder
Schizophr Res, 145 (1-3), 36-42
DOI 10.1016/j.schres.2012.12.023, PubMed 23403415

Publications 2012

Ringen PA, Melle I, Berg AO, Agartz I, Spigset O, Simonsen C, Sundet K, Andreassen OA (2012)
Cannabis use and premorbid functioning as predictors of poorer neurocognition in schizophrenia spectrum disorder
Schizophr Res, 143 (1), 84-9
DOI 10.1016/j.schres.2012.10.021, PubMed 23178107

Publications 2011

Berg AO, Melle I, Rossberg JI, Romm KL, Larsson S, Lagerberg TV, Andreassen OA, Hauff E (2011)
Perceived discrimination is associated with severity of positive and depression/anxiety symptoms in immigrants with psychosis: a cross-sectional study
BMC Psychiatry, 11, 77
DOI 10.1186/1471-244X-11-77, PubMed 21548949

Lagerberg TV, Sundet K, Aminoff SR, Berg AO, Ringen PA, Andreassen OA, Melle I (2011)
Excessive cannabis use is associated with earlier age at onset in bipolar disorder
Eur Arch Psychiatry Clin Neurosci, 261 (6), 397-405
DOI 10.1007/s00406-011-0188-4, PubMed 21267743

Steen NE, Lorentzen S, Barrett EA, Lagerberg TV, Hope S, Larsson S, Berg AO, Agartz I, Melle I, Berg JP, Andreassen OA (2011)
Sex-specific cortisol levels in bipolar disorder and schizophrenia during mental challenge--relationship to clinical characteristics and medication
Prog Neuropsychopharmacol Biol Psychiatry, 35 (4), 1100-7
DOI 10.1016/j.pnpbp.2011.03.008, PubMed 21420462

Publications 2010

Berg AO, Melle I, Torjesen PA, Lien L, Hauff E, Andreassen OA (2010)
A cross-sectional study of vitamin D deficiency among immigrants and Norwegians with psychosis compared to the general population
J Clin Psychiatry, 71 (12), 1598-604
DOI 10.4088/JCP.09m05299yel, PubMed 20441728

Lagerberg TV, Andreassen OA, Ringen PA, Berg AO, Larsson S, Agartz I, Sundet K, Melle I (2010)
Excessive substance use in bipolar disorder is associated with impaired functioning rather than clinical characteristics, a descriptive study
BMC Psychiatry, 10, 9
DOI 10.1186/1471-244X-10-9, PubMed 20105311

Romm KL, Rossberg JI, Berg AO, Barrett EA, Faerden A, Agartz I, Andreassen OA, Melle I (2010)
Depression and depressive symptoms in first episode psychosis
J Nerv Ment Dis, 198 (1), 67-71
DOI 10.1097/NMD.0b013e3181c81fc0, PubMed 20061872

Romm KL, Rossberg JI, Berg AO, Hansen CF, Andreassen OA, Melle I (2010)
Assessment of social anxiety in first episode psychosis using the Liebowitz Social Anxiety scale as a self-report measure
Eur Psychiatry, 26 (2), 115-21
DOI 10.1016/j.eurpsy.2010.08.014, PubMed 21036553

Publications 2009

Larsson S, Lorentzen S, Mork E, Barrett EA, Steen NE, Lagerberg TV, Berg AO, Aminoff SR, Agartz I, Melle I, Andreassen OA (2009)
Age at onset of bipolar disorder in a Norwegian catchment area sample
J Affect Disord, 124 (1-2), 174-7
DOI 10.1016/j.jad.2009.10.031, PubMed 19931918