Publications 2025

Kildahl AN, Langjord T, Pedersen G, Hove O, Urnes Ø, Torgersen T, Eikenæs IHU, Kvarstein EH (2025)
Screening for autism in psychiatric inpatients with severe self-harm - results from the Extreme Challenges research project
Nord J Psychiatry, 79 (4), 303-313
DOI 10.1080/08039488.2025.2497820, PubMed 40319453

Sayar H, Wilberg T, Eikenæs IU, Ekberg A, Leitemo K, Morken KTE, Oftedal E, Omvik S, Ulvestad DA, Pedersen G, Kvarstein EH (2025)
Improvement of alexithymia in patients treated in mental health services for personality disorders: a longitudinal, observational study
Front Psychiatry, 16, 1558654
DOI 10.3389/fpsyt.2025.1558654, PubMed 40206651

Sveen CA, Pedersen G, Wilberg T, Kvarstein EH (2025)
The societal costs of avoidant personality disorder
Personal Ment Health, 19 (1), e1644
DOI 10.1002/pmh.1644, PubMed 39572388

Publications 2024

Bakali JV, Solbakken OA, Hoffart A, Brækhus H, Kvarstein E, Johnson SU (2024)
Affect integration, metacognitions, and early maladaptive schemas as predictors of outcome in cognitive and metacognitive therapies for social anxiety disorder
Psychother Res, 1-13 (in press)
DOI 10.1080/10503307.2024.2443499, PubMed 39729422

Breivik Øvstebø R, Pedersen G, Wilberg T, Røssberg JI, Johnsen Dahl HS, Kvarstein EH (2024)
Countertransference, alliance, and outcome in the treatment of patients with personality disorder: a longitudinal naturalistic study
Front Psychiatry, 15, 1490056
DOI 10.3389/fpsyt.2024.1490056, PubMed 39777194

Eikeseth FF, Pedersen G, Hummelen B, Sütterlin S, Stubhaug A, Kvarstein EH, Kvarstein G (2024)
Pain prevalence rates and the mediating role of negative affect in adults referred to personality disorder treatment: A cross-sectional study
J Pain, 26, 104724
DOI 10.1016/j.jpain.2024.104724, PubMed 39481671

Langjord T, Pedersen G, Bovim T, Bremer K, Christensen TB, Hove O, Kildahl AN, Mork E, Norheim AB, Ramleth RK, Romm KL, Siqveland J, Schønning T, Stänicke LI, Torgersen T, Pettersen MS, Tveit T, Urnes Ø, Walby FA, Kvarstein EH (2024)
Evaluation of health services and treatment alliance among extensively hospitalized patients due to severe self-harm - results from the Extreme Challenges project
Nord J Psychiatry, 78 (7), 591-602
DOI 10.1080/08039488.2024.2376162, PubMed 39126325

Ulvestad DA, Johansen MS, Kvarstein EH, Pedersen G, Wilberg T (2024)
Minding mentalizing - convergent validity of the Mentalization Breakdown Interview
Front Psychiatry, 15, 1380532
DOI 10.3389/fpsyt.2024.1380532, PubMed 38974920

Ulvestad DA, Johansen MS, Kvarstein EH, Pedersen G, Wilberg T (2024)
Corrigendum: Minding mentalizing - convergent validity of the Mentalization Breakdown Interview
Front Psychiatry, 15, 1479612
DOI 10.3389/fpsyt.2024.1479612, PubMed 39234622

Publications 2023

Kvarstein EH, Frøyhaug M, Pettersen MS, Carlsen S, Ekberg A, Fjermestad-Noll J, Ulvestad DA, Gikling EL, Hjermann E, Lindberget K, Omvik S, Eikenæs IU, Hummelen B, Morken KTE, Wilberg T, Pedersen GAF (2023)
Improvement of personality functioning among people treated within personality disorder mental health services. A longitudinal, observational study
Front Psychiatry, 14, 1163347
DOI 10.3389/fpsyt.2023.1163347, PubMed 37229394

Langjord T, Pedersen G, Bovim T, Christensen TB, Eikenæs IU, Hove O, Kildahl AN, Mork E, Norheim AB, Ramleth RK, Ringen PA, Romm KL, Siqveland J, Schønning T, Stänicke L, Torgersen T, Pettersen M, Tveit T, Urnes Ø, Walby F, Kvarstein EH (2023)
Mental health disorders, functioning and health-related quality of life among extensively hospitalized patients due to severe self-harm - results from the Extreme Challenges project
Front Psychiatry, 14, 1258025
DOI 10.3389/fpsyt.2023.1258025, PubMed 37920539

Paap MCS, Pedersen G, Kvarstein E, Hummelen B (2023)
Evaluating the Construct Validity of the Norwegian Version of the Level of Personality Functioning Scale - Brief Form 2.0 in a Large Clinical Sample
J Pers Assess, 106 (1), 49-59
DOI 10.1080/00223891.2023.2182694, PubMed 36897004

Sveen CA, Pedersen G, Hummelen B, Kvarstein EH (2023)
Personality disorders: the impact of severity on societal costs
Eur Arch Psychiatry Clin Neurosci, 275 (1), 181-192
DOI 10.1007/s00406-023-01715-6, PubMed 37991536

Sveen CA, Pedersen G, Ulvestad DA, Zahl KE, Wilberg T, Kvarstein EH (2023)
Societal costs of personality disorders: A cross-sectional multicenter study of treatment-seeking patients in mental health services in Norway
J Clin Psychol, 79 (8), 1752-1769
DOI 10.1002/jclp.23504, PubMed 36916214

Sveen CA, Pedersen G, Ulvestad DA, Zahl KE, Wilberg T, Kvarstein EH (2023)
Societal costs of personality disorders among treatment-seeking patients in Norway: the relative contribution of specific DSM-5 categories
Eur Arch Psychiatry Clin Neurosci, 274 (1), 139-149
DOI 10.1007/s00406-023-01655-1, PubMed 37598131

Wilberg T, Pedersen G, Bremer K, Johansen MS, Kvarstein EH (2023)
Combined group and individual therapy for patients with avoidant personality disorder-A pilot study
Front Psychiatry, 14, 1181686
DOI 10.3389/fpsyt.2023.1181686, PubMed 37215654

Øvstebø RB, Pedersen G, Wilberg T, Røssberg JI, Dahl HSJ, Kvarstein EH (2023)
Countertransference in the treatment of patients with personality disorders: A longitudinal study
Psychother Res, 34 (8), 1051-1065
DOI 10.1080/10503307.2023.2279645, PubMed 37963354

Publications 2022

Faerden A, Rosenqvist C, Håkansson M, Strøm-Gundersen E, Stav Å, Svartsund J, Røssæg T, Davik N, Kvarstein E, Pedersen G, Dieset I, Nyrud AQ, Weedon-Fekjær H, Kistorp KM (2022)
Environmental Transformations Enhancing Dignity in an Acute Psychiatric Ward: Outcome of a User-Driven Service Design Project
HERD, 16 (2), 55-72
DOI 10.1177/19375867221136558, PubMed 36567605

Folmo EJ, Langjord T, Myhrvold NCS, Stänicke E, Lind M, Kvarstein EH (2022)
Pedagogical stance in mentalization-based treatment
J Clin Psychol, 78 (9), 1764-1784
DOI 10.1002/jclp.23335, PubMed 35263445

Publications 2021

Ditlefsen IT, Nissen-Lie HA, Andenaes A, Normann-Eide E, Johansen MS, Kvarstein EH (2021)
"Yes, There Is Actually Hope!"-A Qualitative Investigation of How Patients Experience Mentalization-Based Psychoeducation Tailored for Borderline Personality Disorder
J. Psychother. Integr., 31 (3), 257-276
DOI 10.1037/int0000243

Kvarstein EH, Antonsen BT, Klungsøyr O, Pedersen G, Wilberg T (2021)
Avoidant personality disorder and social functioning: A longitudinal, observational study investigating predictors of change in a clinical sample
Personal Disord, 12 (6), 594-605
DOI 10.1037/per0000471, PubMed 33507789

Kvarstein EH, Zahl KE, Stänicke LI, Pettersen MS, Baltzersen ÅL, Johansen MS, Eikenaes IU, Arnevik EA, Hummelen B, Wilberg T, Pedersen G (2021)
Vulnerability of personality disorder during the Covid-19 crises - a multicenter survey of treatment experiences among patients referred to treatment
Nord J Psychiatry, 76 (1), 52-63
DOI 10.1080/08039488.2021.1934110, PubMed 34126854

Pedersen G, Kvarstein EH, Wilberg T, Folmo EJ, Burlingame GM, Lorentzen S (2021)
The Group Questionnaire (GQ)-Psychometric Properties Among Outpatients With Personality Disorders
Group Dyn.-Theory Res. Pract.
DOI 10.1037/gdn0000176

Pedersen G, Normann-Eide E, Eikenaes IU, Kvarstein EH, Wilberg T (2021)
Psychometric evaluation of the Norwegian Toronto Alexithymia Scale (TAS-20) in a multisite clinical sample of patients with personality disorders and personality problems
J Clin Psychol, 78 (6), 1118-1136
DOI 10.1002/jclp.23270, PubMed 34716595

Publications 2020

Folmo EJ, Stänicke E, Johansen MS, Pedersen G, Kvarstein EH (2020)
Development of therapeutic alliance in mentalization-based treatment-Goals, Bonds, and Tasks in a specialized treatment for borderline personality disorder
Psychother Res, 31 (5), 604-618
DOI 10.1080/10503307.2020.1831097, PubMed 33043816

Kvarstein EH, Folmo E, Antonsen BT, Normann-Eide E, Pedersen G, Wilberg T (2020)
Social Cognition Capacities as Predictors of Outcome in Mentalization-Based Treatment (MBT)
Front Psychiatry, 11, 691
DOI 10.3389/fpsyt.2020.00691, PubMed 32792996

Simonsen S, Eikenaes IU, Bach B, Kvarstein E, Gondan M, Møller SB, Wilberg T (2020)
Level of alexithymia as a measure of personality dysfunction in avoidant personality disorder
Nord J Psychiatry, 75 (4), 266-274
DOI 10.1080/08039488.2020.1841290, PubMed 33146059

Publications 2019

Buer Christensen T, Hummelen B, Paap MCS, Eikenaes I, Selvik SG, Kvarstein E, Pedersen G, Bender DS, Skodol AE, Nysæter TE (2019)
Evaluation of Diagnostic Thresholds for Criterion A in the Alternative DSM-5 Model for Personality Disorders
J Pers Disord, 34 (Supplement C), 40-61
DOI 10.1521/pedi_2019_33_455, PubMed 31682197

Ekeberg O, Urnes O, Hem E, Kvarstein EH, Eikenaes IUM (2019)
Patients with emotionally unstable personality disorder need appropriate emergency treatment
Tidsskr. Nor. Laegeforen., 139 (15), 1442-1444

Ekeberg O, Urnes O, Hem E, Kvarstein EH, Eikenaes IUM (2019)
Suicidal patients with personality disorder
Tidsskr. Nor. Laegeforen., 139 (15), 1445-1447

Ekeberg Ø, Kvarstein EH, Urnes Ø, Eikenæs IU, Hem E (2019)
Suicidal patients with personality disorder
Tidsskr Nor Laegeforen, 139 (15)
DOI 10.4045/tidsskr.19.0493, PubMed 31642623

Ekeberg Ø, Kvarstein EH, Urnes Ø, Eikenæs IU, Hem E (2019)
Patients with borderline personality disorder need tailored emergency care
Tidsskr Nor Laegeforen, 139 (15)
DOI 10.4045/tidsskr.19.0492, PubMed 31642629

Ekeberg Ø, Urnes Ø, Kvarstein EH, Eikenæs IU, Hem E (2019)
[Correction: Patients with borderline personality disorder need tailored emergency care]
Tidsskr Nor Laegeforen, 139 (16)
DOI 10.4045/tidsskr.19.0661, PubMed 31686482

Folmo EJ, Karterud SW, Kongerslev MT, Kvarstein EH, Stanicke E (2019)
Battles of the Comfort Zone: Modelling Therapeutic Strategy, Alliance, and Epistemic Trust-A Qualitative Study of Mentalization-Based Therapy for Borderline Personality Disorder
J. Contemp. Psychother., 49 (3), 141-151
DOI 10.1007/s10879-018-09414-3

Karterud S, Kvarstein EH (2019)
Misleading about MBT in Oslo
BMC Psychiatry, 19 (1), 208
DOI 10.1186/s12888-019-2193-5, PubMed 31272416

Karterud S, Kvarstein EH (2019)
Misleading about MBT in Oslo
BMC Psychiatry, 19

Normann-Eide E, Antonsen BRT, Kvarstein EH, Pedersen G, Vaskinn A, Wilberg T (2019)
Are Impairments in Theory of Mind Specific to Borderline Personality Disorder?
J Pers Disord, 34 (6), 827-841
DOI 10.1521/pedi_2019_33_417, PubMed 30785865

Publications 2018

Buer Christensen T, Paap MCS, Arnesen M, Koritzinsky K, Nysaeter TE, Eikenaes I, Germans Selvik S, Walther K, Torgersen S, Bender DS, Skodol AE, Kvarstein E, Pedersen G, Hummelen B (2018)
Interrater Reliability of the Structured Clinical Interview for the DSM-5 Alternative Model of Personality Disorders Module i: Level of Personality Functioning Scale
J Pers Assess, 100 (6), 630-641
DOI 10.1080/00223891.2018.1483377, PubMed 30084661

Holth F, Walby F, Røstbakken T, Lunde I, Ringen PA, Ramleth RK, Romm KL, Tveit T, Torgersen T, Urnes Ø, Kvarstein EH (2018)
Extreme challenges: psychiatric inpatients with severe self-harming behavior in Norway: a national screening investigation
Nord J Psychiatry, 72 (8), 605-612
DOI 10.1080/08039488.2018.1511751, PubMed 30348040

Johansen MS, Karterud SW, Normann-Eide E, Ro FG, Kvarstein EH, Wilberg T (2018)
The Relationship Between Reflective Functioning and Affect Consciousness in Patients With Avoidant and Borderline Personality Disorders
Psychoanal. Psychol., 35 (4), 382-393
DOI 10.1037/pap0000169

Kvarstein EH, Pedersen G, Folmo E, Urnes Ø, Johansen MS, Hummelen B, Wilberg T, Karterud S (2018)
Mentalization-based treatment or psychodynamic treatment programmes for patients with borderline personality disorder - the impact of clinical severity
Psychol Psychother, 92 (1), 91-111
DOI 10.1111/papt.12179, PubMed 29582581

Pedersen G, Urnes Ø, Hummelen B, Wilberg T, Kvarstein EH (2018)
Revised manual for the Global Assessment of Functioning scale
Eur Psychiatry, 51, 16-19
DOI 10.1016/j.eurpsy.2017.12.028, PubMed 29510296

Publications 2017

Folmo EJ, Karterud SW, Bremer K, Walther KL, Kvarstein EH, Pedersen GAF (2017)
The design of the MBT-G adherence and quality scale
Scand J Psychol, 58 (4), 341-349
DOI 10.1111/sjop.12375, PubMed 28718968

Pedersen G, Kvarstein EH, Wilberg T (2017)
The Work and Social Adjustment Scale: Psychometric properties and validity among males and females, and outpatients with and without personality disorders
Personal Ment Health, 11 (4), 215-228
DOI 10.1002/pmh.1382, PubMed 28681505

Publications 2016

Kvarstein EH, Nordviste O, Dragland L, Wilberg T (2016)
Outpatient psychodynamic group psychotherapy - outcomes related to personality disorder, severity, age and gender
Personal Ment Health, 11 (1), 37-50
DOI 10.1002/pmh.1352, PubMed 27766761

Publications 2015

Antonsen BT, Johansen MS, Rø FG, Kvarstein EH, Wilberg T (2015)
Is reflective functioning associated with clinical symptoms and long-term course in patients with personality disorders?
Compr Psychiatry, 64, 46-58
DOI 10.1016/j.comppsych.2015.05.016, PubMed 26104432

Antonsen BT, Kvarstein EH, Urnes Ø, Hummelen B, Karterud S, Wilberg T (2015)
Favourable outcome of long-term combined psychotherapy for patients with borderline personality disorder: Six-year follow-up of a randomized study
Psychother Res, 27 (1), 51-63
DOI 10.1080/10503307.2015.1072283, PubMed 26261865

Johansen MS, Normann-Eide E, Normann-Eide T, Klungs Yr O, Kvarstein E, Wilberg T (2015)
Relationship Between Affect Consciousness and Personality Functioning in Patients With Personality Disorders: A Prospective Study
J Pers Disord, 30 (5), 633-652
DOI 10.1521/pedi_2015_29_220, PubMed 26168325

Publications 2014

Antonsen BT, Klungsøyr O, Kamps A, Hummelen B, Johansen MS, Pedersen G, Urnes O, Kvarstein EH, Karterud S, Wilberg T (2014)
Step-down versus outpatient psychotherapeutic treatment for personality disorders: 6-year follow-up of the Ullevål personality project
BMC Psychiatry, 14, 119
DOI 10.1186/1471-244X-14-119, PubMed 24758722

Kvarstein EH, Pedersen G, Urnes Ø, Hummelen B, Wilberg T, Karterud S (2014)
Changing from a traditional psychodynamic treatment programme to mentalization-based treatment for patients with borderline personality disorder--does it make a difference?
Psychol Psychother, 88 (1), 71-86
DOI 10.1111/papt.12036, PubMed 25045028

Pedersen G, Urnes Ø, Kvarstein EH, Karterud S (2014)
The three factors of the psychoticism scale of SCL-90-R
Personal Ment Health, 10 (3), 244-55
DOI 10.1002/pmh.1278, PubMed 25475425

Wilberg T, Kvarstein EH, Røvik JO (2014)
Patients with personality disorders in private specialist practice
Tidsskr Nor Laegeforen, 134 (23-24), 2267-72
DOI 10.4045/tidsskr.13.1581, PubMed 25492335

Publications 2013

Kvarstein EH, Arnevik E, Halsteinli V, Rø FG, Karterud S, Wilberg T (2013)
Health service costs and clinical gains of psychotherapy for personality disorders: a randomized controlled trial of day-hospital-based step-down treatment versus outpatient treatment at a specialist practice
BMC Psychiatry, 13, 315
DOI 10.1186/1471-244X-13-315, PubMed 24268099

Kvarstein EH, Karterud S (2013)
Large variation of severity and longitudinal change of symptom distress among patients with personality disorders
Personal Ment Health, 7 (4), 265-76
DOI 10.1002/pmh.1226, PubMed 24343976

Publications 2012

Kvarstein EH, Karterud S (2012)
Large variations of global functioning over five years in treated patients with personality traits and disorders
J Pers Disord, 26 (2), 141-61
DOI 10.1521/pedi.2012.26.2.141, PubMed 22486446

Publications 1995

KVARSTEIN E (1995)
A RESIDENTS EXPERIENCES AND REFLECTIONS - THE CAMEL GETTING THROUGH THE NEEDLES EYE
Nord. J. Psychiatr., 49 34, 62-63
DOI 10.3109/08039489509100228