Publications 2025

Glastad SH, Klungsøyr O, Aminoff SR, Hagen R, Bjella T, Engen MJ, Lyngstad SH, Busch C, Icick R, Etain B, Melle I, Andreassen OA, Høegh MC, Lagerberg TV (2025)
Exploring the temporal relationship between mood, alcohol- and nicotine use in bipolar disorder using time-series analyses
Int J Bipolar Disord, 13 (1), 18
DOI 10.1186/s40345-025-00388-5, PubMed 40407853

Høegh MC, Glastad SH, Lyngstad SH, Engen MJ, Aminoff SR, Melle I, Bjella T, Lagerberg TV (2025)
The MinDag app for symptom monitoring and feedback to patients and clinicians during the initial treatment of bipolar disorder - a feasibility study
Int J Bipolar Disord, 13 (1), 14
DOI 10.1186/s40345-025-00382-x, PubMed 40178653

Romm KL, Skoge M, Barrett EA, Berentzen LC, Bergsager D, Fugelli P, Bjella T, Gardsjord ES, Kling K, Kruse SH, Kværner KJ, Melle I, Mork E, Ihler HM, Rognli EB, Simonsen C, Værnes TG, Aminoff SR (2025)
A Mobile Health Intervention to Support Collaborative Decision-Making in Mental Health Care: Development and Usability
JMIR Form Res, 9, e57614
DOI 10.2196/57614, PubMed 39823632

Publications 2024

Shafi DES, Jørgensen KN, Bjella T, Nesvåg R, Dieset I, Melle I, Andreassen OA, Jönsson EG (2024)
Prescriptions of psychotropic and somatic medications among patients with severe mental disorders and healthy controls in a naturalistic study
Nord J Psychiatry, 78 (3), 212-219
DOI 10.1080/08039488.2024.2305806, PubMed 38306243

Simonsen C, Åsbø G, Slade M, Wold KF, Widing L, Flaaten CB, Engen MJ, Lyngstad SH, Gardsjord E, Bjella T, Romm KL, Ueland T, Melle I (2024)
A good life with psychosis: rate of positive outcomes in first-episode psychosis at 10-year follow-up
Psychol Med, 54 (9), 2112-2121
DOI 10.1017/S0033291724000205, PubMed 38389456

Wootton O, Shadrin AA, Bjella T, Smeland OB, van der Meer D, Frei O, O'Connell KS, Ueland T, Andreassen OA, Stein DJ, Dalvie S (2024)
Genomic insights into the shared and distinct genetic architecture of cognitive function and schizophrenia
Sci Rep, 14 (1), 15356
DOI 10.1038/s41598-024-66085-y, PubMed 38961113

Publications 2023

Cheng W, Parker N, Karadag N, Koch E, Hindley G, Icick R, Shadrin A, O'Connell KS, Bjella T, Bahrami S, Rahman Z, Tesfaye M, Jaholkowski P, Rødevand L, Holen B, Lagerberg TV, Steen NE, Djurovic S, Dale AM, Frei O, Smeland OB, Andreassen OA (2023)
The relationship between cannabis use, schizophrenia, and bipolar disorder: a genetically informed study
Lancet Psychiatry, 10 (6), 441-451
DOI 10.1016/S2215-0366(23)00143-8, PubMed 37208114

Flaaten CB, Melle I, Bjella T, Engen MJ, Åsbø G, Wold KF, Widing L, Gardsjord E, Øie MG, Lyngstad SH, Haatveit B, Simonsen C, Ueland T (2023)
Long-term course of cognitive functioning in bipolar disorder: A ten-year follow-up study
Bipolar Disord, 26 (2), 136-147
DOI 10.1111/bdi.13364, PubMed 37356974

Hindley G, Shadrin AA, van der Meer D, Parker N, Cheng W, O'Connell KS, Bahrami S, Lin A, Karadag N, Holen B, Bjella T, Deary IJ, Davies G, Hill WD, Bressler J, Seshadri S, Fan CC, Ueland T, Djurovic S, Smeland OB, Frei O, Dale AM, Andreassen OA (2023)
Multivariate genetic analysis of personality and cognitive traits reveals abundant pleiotropy
Nat Hum Behav, 7 (9), 1584-1600
DOI 10.1038/s41562-023-01630-9, PubMed 37365406

Haatveit B, Westlye LT, Vaskinn A, Flaaten CB, Mohn C, Bjella T, Sæther LS, Sundet K, Melle I, Andreassen OA, Alnæs D, Ueland T (2023)
Intra- and inter-individual cognitive variability in schizophrenia and bipolar spectrum disorder: an investigation across multiple cognitive domains
Schizophrenia (Heidelb), 9 (1), 89
DOI 10.1038/s41537-023-00414-4, PubMed 38110366

Villar JD, Stavrum AK, Spindola LM, Torsvik A, Bjella T, Steen NE, Djurovic S, Andreassen OA, Steen VM, Le Hellard S (2023)
Differences in white blood cell proportions between schizophrenia cases and controls are influenced by medication and variations in time of day
Transl Psychiatry, 13 (1), 211
DOI 10.1038/s41398-023-02507-1, PubMed 37330513

Widing L, Simonsen C, Bjella T, Engen MJ, Flaaten CB, Gardsjord E, Haatveit B, Haug E, Lyngstad SH, Svendsen IH, Vik RK, Wold KF, Åsbø G, Ueland T, Melle I (2023)
Long-term Outcomes of People With DSM Psychotic Disorder NOS
Schizophr Bull Open, 4 (1), sgad005
DOI 10.1093/schizbullopen/sgad005, PubMed 39145337

Publications 2022

Flaaten CB, Melle I, Bjella T, Engen MJ, Åsbø G, Wold KF, Widing L, Gardsjord E, Sæther LS, Øie MG, Lyngstad SH, Haatveit B, Simonsen C, Ueland T (2022)
Domain-specific cognitive course in schizophrenia: Group- and individual-level changes over 10 years
Schizophr Res Cogn, 30, 100263
DOI 10.1016/j.scog.2022.100263, PubMed 35783460

Flaaten CB, Melle I, Gardsjord E, Bjella T, Engen MJ, Vaskinn A, Åsbø G, Wold KF, Widing L, Lyngstad SH, Haatveit B, Simonsen C, Ueland T (2022)
Course of intellectual functioning in schizophrenia and bipolar disorder: a 10-year follow-up study
Psychol Med, 53 (6), 2662-2670
DOI 10.1017/S0033291721004645, PubMed 35256030

Åsbø G, Ueland T, Haatveit B, Bjella T, Flaaten CB, Wold KF, Widing L, Engen MJ, Lyngstad SH, Gardsjord E, Romm KL, Melle I, Simonsen C (2022)
The Time is Ripe for a Consensus Definition of Clinical Recovery in First-episode Psychosis: Suggestions Based on a 10-Year Follow-up Study
Schizophr Bull, 48 (4), 839-849
DOI 10.1093/schbul/sbac035, PubMed 35419608

Publications 2020

Szabo A, Akkouh IA, Ueland T, Lagerberg TV, Dieset I, Bjella T, Aukrust P, Le Hellard S, Stavrum AK, Melle I, Andreassen OA, Djurovic S (2020)
Cannabis Use Is Associated With Increased Levels of Soluble gp130 in Schizophrenia but Not in Bipolar Disorder
Front Psychiatry, 11, 642
DOI 10.3389/fpsyt.2020.00642, PubMed 32714224

Publications 2019

Laskemoen JF, Simonsen C, Büchmann C, Barrett EA, Bjella T, Lagerberg TV, Vedal TJ, Andreassen OA, Melle I, Aas M (2019)
Sleep disturbances in schizophrenia spectrum and bipolar disorders - a transdiagnostic perspective
Compr Psychiatry, 91, 6-12
DOI 10.1016/j.comppsych.2019.02.006, PubMed 30856497

Torske T, Naerland T, Bettella F, Bjella T, Malt E, Høyland AL, Stenberg N, Øie MG, Andreassen OA (2019)
Autism spectrum disorder polygenic scores are associated with every day executive function in children admitted for clinical assessment
Autism Res, 13 (2), 207-220
DOI 10.1002/aur.2207, PubMed 31571410

Publications 2018

Simonsen C, Faerden A, Ueland T, Vaskinn A, Bjella T, Andreassen O, Romm KL, Melle I (2018)
Self-rated disability in first treated episode of psychosis: A 1-year follow-up study
Compr Psychiatry, 85, 48-54
DOI 10.1016/j.comppsych.2018.06.004, PubMed 29981504

Publications 2017

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

Publications 2016

Haram M, Bettella F, Brandt CL, Quintana DS, Nerhus M, Bjella T, Djurovic S, Westlye LT, Andreassen OA, Melle I, Tesli M (2016)
Contribution of oxytocin receptor polymorphisms to amygdala activation in schizophrenia spectrum disorders
BJPsych Open, 2 (6), 353-358
DOI 10.1192/bjpo.bp.116.003376, PubMed 27847593

Lagerberg TV, Aminoff SR, Aas M, Bjella T, Henry C, Leboyer M, Pedersen G, Bellivier F, Icick R, Andreassen OA, Etain B, Melle I (2016)
Alcohol use disorders are associated with increased affective lability in bipolar disorder
J Affect Disord, 208, 316-324
DOI 10.1016/j.jad.2016.09.062, PubMed 27810713

Publications 2014

Aas M, Haukvik UK, Djurovic S, Tesli M, Athanasiu L, Bjella T, Hansson L, Cattaneo A, Agartz I, Andreassen OA, Melle I (2014)
Interplay between childhood trauma and BDNF val66met variants on blood BDNF mRNA levels and on hippocampus subfields volumes in schizophrenia spectrum and bipolar disorders
J Psychiatr Res, 59, 14-21
DOI 10.1016/j.jpsychires.2014.08.011, PubMed 25246365

Aas M, Pedersen G, Henry C, Bjella T, Bellivier F, Leboyer M, Kahn JP, Cohen RF, Gard S, Aminoff SR, Lagerberg TV, Andreassen OA, Melle I, Etain B (2014)
Psychometric properties of the Affective Lability Scale (54 and 18-item version) in patients with bipolar disorder, first-degree relatives, and healthy controls
J Affect Disord, 172, 375-80
DOI 10.1016/j.jad.2014.10.028, PubMed 25451440

Publications 2012

Dieset I, Hope S, Ueland T, Bjella T, Agartz I, Melle I, Aukrust P, Røssberg JI, Andreassen OA (2012)
Cardiovascular risk factors during second generation antipsychotic treatment are associated with increased C-reactive protein
Schizophr Res, 140 (1-3), 169-74
DOI 10.1016/j.schres.2012.06.040, PubMed 22817875

Publications 2010

Djurovic S, Gustafsson O, Mattingsdal M, Athanasiu L, Bjella T, Tesli M, Agartz I, Lorentzen S, Melle I, Morken G, Andreassen OA (2010)
A genome-wide association study of bipolar disorder in Norwegian individuals, followed by replication in Icelandic sample
J Affect Disord, 126 (1-2), 312-6
DOI 10.1016/j.jad.2010.04.007, PubMed 20451256