Ragnar Nesvåg
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Author network for Ragnar Nesvåg by COREMINE medical


Publications 2017

Long EC, Aggen SH, Neale MC, Knudsen GP, Krueger RF, South SC, Czajkowski N, Nesvåg R, Ystrom E, Torvik FA, Kendler KS, Gillespie NA, Reichborn-Kjennerud T (2017)
The association between personality disorders with alcohol use and misuse: A population-based twin study
Drug Alcohol Depend, 174, 171-180
PubMed 28334662

Nesvåg R, Jönsson EG, Bakken IJ, Knudsen GP, Bjella TD, Reichborn-Kjennerud T, Melle I, Andreassen OA (2017)
The quality of severe mental disorder diagnoses in a national health registry as compared to research diagnoses based on structured interview
BMC Psychiatry, 17 (1), 93
PubMed 28292279

Nesvåg R, Reichborn-Kjennerud T, Gillespie NA, Knudsen GP, Bramness JG, Kendler KS, Ystrom E (2017)
Genetic and Environmental Contributions to the Association Between Cannabis Use and Psychotic-Like Experiences in Young Adult Twins
Schizophr Bull, 43 (3), 644-653
PubMed 27431873

Publications 2016

Hartz I, Skurtveit S, Hjellvik V, Furu K, Nesvåg R, Handal M (2016)
Antidepressant drug use among adolescents during 2004-2013: a population-based register linkage study
Acta Psychiatr Scand, 134 (5), 420-429
PubMed 27571234

Høye A, Nesvåg R, Reichborn-Kjennerud T, Jacobsen BK (2016)
Sex differences in mortality among patients admitted with affective disorders in North Norway: a 33-year prospective register study
Bipolar Disord, 18 (3), 272-81
PubMed 27226265

Jørgensen KN, Nerland S, Norbom LB, Doan NT, Nesvåg R, Mørch-Johnsen L, Haukvik UK, Melle I, Andreassen OA, Westlye LT, Agartz I (2016)
Increased MRI-based cortical grey/white-matter contrast in sensory and motor regions in schizophrenia and bipolar disorder
Psychol Med, 46 (9), 1971-85
PubMed 27049014

Jørgensen KN, Nesvåg R, Nerland S, Mørch-Johnsen L, Westlye LT, Lange EH, Haukvik UK, Hartberg CB, Melle I, Andreassen OA, Agartz I (2016)
Brain volume change in first-episode psychosis: an effect of antipsychotic medication independent of BMI change
Acta Psychiatr Scand, 135 (2), 117-126
PubMed 27925164

Lange EH, Nerland S, Jørgensen KN, Mørch-Johnsen L, Nesvåg R, Hartberg CB, Haukvik UK, Osnes K, Melle I, Andreassen OA, Agartz I (2016)
Alcohol use is associated with thinner cerebral cortex and larger ventricles in schizophrenia, bipolar disorder and healthy controls
Psychol Med, 47 (4), 655-668
PubMed 27830632

Mørch-Johnsen L, Nesvåg R, Jørgensen KN, Lange EH, Hartberg CB, Haukvik UK, Kompus K, Westerhausen R, Osnes K, Andreassen OA, Melle I, Hugdahl K, Agartz I (2016)
Auditory Cortex Characteristics in Schizophrenia: Associations With Auditory Hallucinations
Schizophr Bull, 43 (1), 75-83
PubMed 27605526

Nesvåg R, Hartz I, Bramness JG, Hjellvik V, Handal M, Skurtveit S (2016)
Mental disorder diagnoses among children and adolescents who use antipsychotic drugs
Eur Neuropsychopharmacol, 26 (9), 1412-8
PubMed 27452144

Ringen PA, Nesvåg R, Helle S, Lagerberg TV, Lange EH, Løberg EM, Agartz I, Andreassen OA, Melle I (2016)
Premorbid cannabis use is associated with more symptoms and poorer functioning in schizophrenia spectrum disorder
Psychol Med, 46 (15), 3127-3136
PubMed 27534999

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
PubMed 27146044

Publications 2015

Barrett EA, Mork E, Færden A, Nesvåg R, Agartz I, Andreassen OA, Melle I (2015)
The development of insight and its relationship with suicidality over one year follow-up in patients with first episode psychosis
Schizophr Res, 162 (1-3), 97-102
PubMed 25620119

Haukvik UK, Hartberg CB, Nerland S, Jørgensen KN, Lange EH, Simonsen C, Nesvåg R, Dale AM, Andreassen OA, Melle I, Agartz I (2015)
No progressive brain changes during a 1-year follow-up of patients with first-episode psychosis
Psychol Med, 46 (3), 589-98
PubMed 26526001

Jørgensen KN, Nesvåg R, Gunleiksrud S, Raballo A, Jönsson EG, Agartz I (2015)
First- and second-generation antipsychotic drug treatment and subcortical brain morphology in schizophrenia
Eur Arch Psychiatry Clin Neurosci, 266 (5), 451-60
PubMed 26547434

Mørch-Johnsen L, Nesvåg R, Faerden A, Haukvik UK, Jørgensen KN, Lange EH, Andreassen OA, Melle I, Agartz I (2015)
Brain structure abnormalities in first-episode psychosis patients with persistent apathy
Schizophr Res, 164 (1-3), 59-64
PubMed 25818626

Nesvåg R, Bramness JG, Ystrom E, Suzanne Krebs T, Johansen PØ (2015)
The link between use of psychedelic drugs and mental health problems
J Psychopharmacol, 29 (9), 1035-6
PubMed 26395581

Nesvåg R, Knudsen GP, Bakken IJ, Høye A, Ystrom E, Surén P, Reneflot A, Stoltenberg C, Reichborn-Kjennerud T (2015)
Substance use disorders in schizophrenia, bipolar disorder, and depressive illness: a registry-based study
Soc Psychiatry Psychiatr Epidemiol, 50 (8), 1267-76
PubMed 25680837

Publications 2014

Bakken IJ, Revdal E, Nesvåg R, Brenner E, Knudsen GP, Surén P, Ghaderi S, Gunnes N, Magnus P, Reichborn-Kjennerud T, Camilla Stoltenberg, Trogstad LI, Håberg SE, Brodtkorb E (2014)
Substance use disorders and psychotic disorders in epilepsy: a population-based registry study
Epilepsy Res, 108 (8), 1435-43
PubMed 25062893

Publications 2013

Faerden A, Barrett EA, Nesvåg R, Friis S, Finset A, Marder SR, Ventura J, Andreassen OA, Agartz I, Melle I (2013)
Apathy, poor verbal memory and male gender predict lower psychosocial functioning one year after the first treatment of psychosis
Psychiatry Res, 210 (1), 55-61
PubMed 23489592

Lange EH, Nesvåg R, Ringen PA, Hartberg CB, Haukvik UK, Andreassen OA, Melle I, Agartz I (2013)
One year follow-up of alcohol and illicit substance use in first-episode psychosis: does gender matter?
Compr Psychiatry, 55 (2), 274-82
PubMed 24262129

Nesvåg R, Schaer M, Haukvik UK, Westlye LT, Rimol LM, Lange EH, Hartberg CB, Ottet MC, Melle I, Andreassen OA, Jönsson EG, Agartz I, Eliez S (2013)
Reduced brain cortical folding in schizophrenia revealed in two independent samples
Schizophr Res, 152 (2-3), 333-8
PubMed 24365403

Publications 2012

Nesvåg R, Bergmann Ø, Rimol LM, Lange EH, Haukvik UK, Hartberg CB, Fagerberg T, Söderman E, Jönsson EG, Agartz I (2012)
A 5-year follow-up study of brain cortical and subcortical abnormalities in a schizophrenia cohort
Schizophr Res, 142 (1-3), 209-16
PubMed 23116883

Rimol LM, Nesvåg R, Hagler DJ, Bergmann O, Fennema-Notestine C, Hartberg CB, Haukvik UK, Lange E, Pung CJ, Server A, Melle I, Andreassen OA, Agartz I, Dale AM (2012)
Cortical volume, surface area, and thickness in schizophrenia and bipolar disorder
Biol Psychiatry, 71 (6), 552-60
PubMed 22281121

Publications 2011

Hartberg CB, Sundet K, Rimol LM, Haukvik UK, Lange EH, Nesvåg R, Dale AM, Melle I, Andreassen OA, Agartz I (2011)
Brain cortical thickness and surface area correlates of neurocognitive performance in patients with schizophrenia, bipolar disorder, and healthy adults
J Int Neuropsychol Soc, 17 (6), 1080-93
PubMed 22013998

Hartberg CB, Sundet K, Rimol LM, Haukvik UK, Lange EH, Nesvåg R, Melle I, Andreassen OA, Agartz I (2011)
Subcortical brain volumes relate to neurocognition in schizophrenia and bipolar disorder and healthy controls
Prog Neuropsychopharmacol Biol Psychiatry, 35 (4), 1122-30
PubMed 21457744

Haukvik UK, Schaer M, Nesvåg R, McNeil T, Hartberg CB, Jönsson EG, Eliez S, Agartz I (2011)
Cortical folding in Broca's area relates to obstetric complications in schizophrenia patients and healthy controls
Psychol Med, 42 (6), 1329-37
PubMed 22029970

Publications 2010

Barrett EA, Sundet K, Faerden A, Nesvåg R, Agartz I, Fosse R, Mork E, Steen NE, Andreassen OA, Melle I (2010)
Suicidality before and in the early phases of first episode psychosis
Schizophr Res, 119 (1-3), 11-7
PubMed 20399077

Faerden A, Finset A, Friis S, Agartz I, Barrett EA, Nesvåg R, Andreassen OA, Marder SR, Melle I (2010)
Apathy in first episode psychosis patients: one year follow up
Schizophr Res, 116 (1), 20-6
PubMed 19948392

Haukvik UK, McNeil T, Nesvåg R, Söderman E, Jönsson E, Agartz I (2010)
No effect of obstetric complications on basal ganglia volumes in schizophrenia
Prog Neuropsychopharmacol Biol Psychiatry, 34 (4), 619-23
PubMed 20193725

Nesvåg R, Lange EH, Faerden A, Barrett EA, Emilsson B, Ringen PA, Andreassen OA, Melle I, Agartz I (2010)
The use of screening instruments for detecting alcohol and other drug use disorders in first-episode psychosis
Psychiatry Res, 177 (1-2), 228-34
PubMed 20178887

Rimol LM, Hartberg CB, Nesvåg R, Fennema-Notestine C, Hagler DJ, Pung CJ, Jennings RG, Haukvik UK, Lange E, Nakstad PH, Melle I, Andreassen OA, Dale AM, Agartz I (2010)
Cortical thickness and subcortical volumes in schizophrenia and bipolar disorder
Biol Psychiatry, 68 (1), 41-50
PubMed 20609836

Publications 2009

Faerden A, Friis S, Agartz I, Barrett EA, Nesvåg R, Finset A, Melle I (2009)
Apathy and functioning in first-episode psychosis
Psychiatr Serv, 60 (11), 1495-503
PubMed 19880468

Lawyer G, Ferkingstad E, Nesvåg R, Varnäs K, Agartz I (2009)
Local and covariate-modulated false discovery rates applied in neuroimaging
Neuroimage, 47 (1), 213-9
PubMed 19341802

Lawyer G, Nesvag R, Varnas K, Frigessi A, Agartz I (2009)
Investigating possible subtypes of schizophrenia patients and controls based on brain cortical thickness (vol 164, pg 254, 2008)
Psychiatry Res. Neuroimaging, 171 (3), 258

Lawyer G, Nesvåg R, Varnäs K, Okugawa G, Agartz I (2009)
Grey and white matter proportional relationships in the cerebellar vermis altered in schizophrenia
Cerebellum, 8 (1), 52-60
PubMed 18972181

Nesvåg R, Saetre P, Lawyer G, Jönsson EG, Agartz I (2009)
The relationship between symptom severity and regional cortical and grey matter volumes in schizophrenia
Prog Neuropsychopharmacol Biol Psychiatry, 33 (3), 482-90
PubMed 19439246

Publications 2008

Faerden A, Nesvåg R, Marder SR (2008)
Definitions of the term 'recovered' in schizophrenia and other disorders
Psychopathology, 41 (5), 271-8
PubMed 18594161

Henriksson KM, Kelly BD, Lane A, Agartz I, Nesvåg R, Cantor-Graae E, O'Callaghan E, McNeil TF (2008)
Minor physical anomalies in schizophrenia: is age a confounding factor?
Psychol Med, 38 (1), 154-6
PubMed 17640439

Kelly BD, Lane A, Lawyer G, Agartz I, McNeil TF, Henriksson KM, Nesvåg R (2008)
Craniofacial dysmorphology and cortical thickness in men with schizophrenia
Schizophr Res, 103 (1-3), 322-3
PubMed 18501563

Lawyer G, Nesvåg R, Varnäs K, Frigessi A, Agartz I (2008)
Investigating possible subtypes of schizophrenia patients and controls based on brain cortical thickness
Psychiatry Res, 164 (3), 254-64
PubMed 19022629

Varnäs K, Lawyer G, Jönsson EG, Kulle B, Nesvåg R, Hall H, Terenius L, Agartz I (2008)
Brain-derived neurotrophic factor polymorphisms and frontal cortex morphology in schizophrenia
Psychiatr Genet, 18 (4), 177-83
PubMed 18628679

Publications 2007

Faerden A, Nesvåg R, Barrett EA, Agartz I, Finset A, Friis S, Rossberg JI, Melle I (2007)
Assessing apathy: the use of the Apathy Evaluation Scale in first episode psychosis
Eur Psychiatry, 23 (1), 33-9
PubMed 18029152

Nesvåg R, Frigessi A, Jönsson EG, Agartz I (2007)
Effects of alcohol consumption and antipsychotic medication on brain morphology in schizophrenia
Schizophr Res, 90 (1-3), 52-61
PubMed 17218084

Nesvåg R, Lawyer G, Varnäs K, Fjell AM, Walhovd KB, Frigessi A, Jönsson EG, Agartz I (2007)
Regional thinning of the cerebral cortex in schizophrenia: effects of diagnosis, age and antipsychotic medication
Schizophr Res, 98 (1-3), 16-28
PubMed 17933495

Ringen PA, Lagerberg TV, Birkenaes AB, Engn J, Faerden A, Jónsdottir H, Nesvåg R, Friis S, Opjordsmoen S, Larsen F, Melle I, Andreassen OA (2007)
Differences in prevalence and patterns of substance use in schizophrenia and bipolar disorder
Psychol Med, 38 (9), 1241-9
PubMed 18070373

Ringen PA, Melle I, Birkenaes AB, Engh JA, Faerden A, Jónsdóttir H, Nesvåg R, Vaskinn A, Friis S, Larsen F, Opjordsmoen S, Sundet K, Andreassen OA (2007)
Illicit drug use in patients with psychotic disorders compared with that in the general population: a cross-sectional study
Acta Psychiatr Scand, 117 (2), 133-8
PubMed 18081921

Varnäs K, Okugawa G, Hammarberg A, Nesvåg R, Rimol LM, Franck J, Agartz I (2007)
Cerebellar volumes in men with schizophrenia and alcohol dependence
Psychiatry Clin Neurosci, 61 (3), 326-9
PubMed 17472604

Publications 2006

Nesvåg R, Hendset M, Refsum H, Tanum L (2006)
Serum concentrations of risperidone and 9-OH risperidone following intramuscular injection of long-acting risperidone compared with oral risperidone medication
Acta Psychiatr Scand, 114 (1), 21-6
PubMed 16774657

Publications 2005

Nesvåg R, Tanum L (2005)
Therapeutic drug monitoring of patients on risperidone depot
Nord J Psychiatry, 59 (1), 51-5
PubMed 16195099