• A randomized controlled trial of concentrated ERP, self-help and waiting list for obsessive- compulsive disorder: The Bergen 4-Day Treatment 

      Launes, Gunvor; Hagen, Kristen; Sunde, Tor; Øst, Lars Gøran; Klovning, Ingrid; Laukvik, Inger Lill; Himle, Joseph A.; Solem, Stian; Hystad, Sigurd William; Hansen, Bjarne; Kvale, Gerd (Journal article; Peer reviewed, 2019)
      Background: The Bergen 4-day treatment (B4DT) is a concentrated exposure-based treatment for patients with Obsessive-Compulsive Disorder (OCD) delivered during four consecutive days. The B4DT has in a number of effectiveness ...
    • The Bergen 4-Day Treatment (B4DT) for Obsessive-Compulsive Disorder: Outcomes for Patients Treated After Initial Waiting List or Self-Help Intervention 

      Launes, Gunvor; Hagen, Kristen; Öst, Lars Gøran; Solem, Stian; Hansen, Bjarne; Kvale, Gerd (Peer reviewed; Journal article, 2020)
      The Bergen 4-day treatment (B4DT) for obsessive-compulsive disorder (OCD) was recently tested in a randomized controlled trial, where the results showed that the B4DT was more effective than a self-help intervention (SH) ...
    • The Bergen 4-day treatment for panic disorder: implementation in a rural clinical setting 

      Eide, Thorstein Olsen; Hjelle, Kay Morten; Sætre, Ida Ueland; Solem, Stian; Olsen, Thorbjørn; Skøld, Rolf Olof; Kvale, Gerd; Hansen, Bjarne Kristian Aaslie; Hagen, Kristen (Journal article; Peer reviewed, 2023)
      Introduction The Bergen 4-Day Treatment (B4DT) is a concentrated treatment with individually tailored exposure exercises. The format has shown promising results in the treatment of panic disorder. Aim The aim of the ...
    • The Bergen 4-day treatment for panic disorder: replication and implementation in a new clinic 

      Iversen, Hanne Moe; Eide, Thorstein Olsen; Harvold, Mathea; Solem, Stian; Kvale, Gerd; Hansen, Bjarne Kristian Aaslie; Hagen, Kristen (Peer reviewed; Journal article, 2022)
      Background Bergen 4-day treatment (B4DT) is a concentrated exposure-based treatment (cET), where the patient receives concentrated, individually tailored cognitive behavioral therapy (CBT) during four consecutive days. ...
    • Changes in contamination-related obsessions and compulsions during the COVID-19 pandemic: A Norwegian longitudinal study 

      Grøtte, Torun; Hagen, Kristen; Eid, Jarle; Kvale, Gerd; Hellard, Stephanie Francoise Claire Le; Solem, Stian (Peer reviewed; Journal article, 2022)
      Background Early stages of the COVID-19 pandemic have been associated with increasing obsessive-compulsive symptoms (OCS), but less is known regarding these symptoms’ long-term trajectories. The aim of this study was ...
    • Changes in mental health symptoms from April (COVID-19 outbreak) to December 2020 in Norway: A two-wave study 

      Hagen, Kristen; Solem, Stian; Stavrum, Anne-Kristin Støbakk; Eid, Jarle; Kvale, Gerd; Samdal, Oddrun; Hellard, Stephanie Francoise Claire Le (Peer reviewed; Journal article, 2023)
      The main objective of the study was to investigate changes in mental health symptoms from the start of the pandemic in Norway (April) to December 2020. A total of 6017 participants completed an assessment of the survey at ...
    • Cognitive Behavior Therapy for Adult Anxiety Disorders in Routine Clinical Care: A Systematic Review and Meta-Analysis 

      Öst, Lars Gøran; Enebrink, Pia; Finnes, Anna; Ghaderi, Ata; Havnen, Audun; Kvale, Gerd; Salomonsson, Sigrid; Wergeland, Gro Janne Henningsen (Peer reviewed; Journal article, 2023)
      Cognitive-behavioral therapy (CBT) has received strong research support for anxiety disorders such as panic disorder, agoraphobia, social anxiety disorder, and generalized anxiety disorder. However, less is known about how ...
    • Cognitive behavior therapy for adult depressive disorders in routine clinical care: A systematic review and meta-analysis 

      Öst, Lars Gøran; Enebrink, Pia; Finnes, Anna; Ghaderi, Ata; Havnen, Audun; Kvale, Gerd; Salomonsson, Sigrid; Wergeland, Gro Janne Henningsen (Journal article; Peer reviewed, 2023)
      Background Different cognitive behavioral therapies (CBT) have strong research support for treatment of adult depressive disorders (DD). Given the scarcity of knowledge about the performance of CBT in routine clinical ...
    • Cognitive behavior therapy for obsessive-compulsive disorder in routine clinical care: A systematic review and meta-analysis 

      Öst, Lars Gøran; Enebrink, Pia; Finnes, Anna; Ata, Ghaderi; Havnen, Audun; Kvale, Gerd; Salomonsson, Sigrid; Wergeland, Gro Janne Henningsen (Journal article; Peer reviewed, 2022)
    • Cohort Profile: COVIDMENT: COVID-19 cohorts on mental health across six nations 

      Unnarsdóttir, Anna Bára; Lovik, Anikó; Fawns-Ritchie, Chloe; Ask, Helga; Kõiv, Kadri; Hagen, Kristen; Didriksen, Maria; Christoffersen, Lea Arregui Nordahl; Garðarsson, Alexander Berg; McIntosh, Andrew; Kähler, Anna K.; Campbell, Archie; Hauksdóttir, Arna; Erikstrup, Christian; Mikkelsen, Dorte Helenius; Altschul, Drew; Thordardottir, Edda Bjork; Frans, Emma Maria; Kvale, Gerd; Tómasson, Gunnar; Kariis, Hanna Maria; Jónsdóttir, Harpa Lind; Rúnarsdóttir, Harpa; Magnúsdóttir, Ingibjörg; Eid, Jarle; Jakobsdóttir, Jóhanna; Nielsen, Kaspar René; Kaspersen, Kathrine Agergård; Milani, Lili; Trogstad, Lill-Iren Schou; Yi, Lu; Bruun, Mie Topholm; Sullivan, Patrick F.; Magnus, Per Minor; Shen, Qing; Nesvåg, Ragnar; Brandlistuen, Ragnhild Eek; Mägi, Reedik; Ostrowski, Sisse Rye; Løkhammer, Solveig; Solem, Stian; Reichborn-Kjennerud, Ted; Hansen, Thomas Folkmann; Werge, Thomas; Aspelund, Thor; Porteous, David J.; Fang, Fang; Lehto, Kelli; Andreassen, Ole; Pedersen, Ole Birger Vesterager; Hellard, Stephanie Francoise Claire Le; Valdimarsdóttir, Unnur Anna (Journal article; Peer reviewed, 2021)
      Key features • COVIDMENT [www.covidment.is] is a NordForsk-funded research collaboration across six nations, with the overarching aim to significantly advance current knowledge on mental morbidity trajectories associated ...
    • Dispositional resilience in treatment‐seeking patients with obsessive‐compulsive disorder and its association with treatment outcome 

      Holm, Silje Elisabeth Hasmo; Hansen, Bjarne; Kvale, Gerd; Eilertsen, Thomas; Johnsen, Bjørn Helge; Hystad, Sigurd William; Solem, Stian (Journal article; Peer reviewed, 2019)
      There is a lack of research on the relation between obsessive‐compulsive disorder (OCD) and resilience. Dispositional resilience, as described and defined in literature on hardiness, consists of three facets, namely beliefs ...
    • Does Concentrated Exposure Treatment for Obsessive-Compulsive Disorder Improve Insomnia Symptoms? Results From a Randomized Controlled Trial 

      Hagen, Kristen; Nordahl, Håkon; Launes, Gunvor; Kvale, Gerd; Öst, Lars Gøran; Hystad, Sigurd; Hansen, Bjarne; Solem, Stian (Peer reviewed; Journal article, 2021)
      Insomnia is a substantial problem in patients with obsessive-compulsive disorder (OCD). There is, however, a lack of studies investigating changes in concurrent symptoms of insomnia in OCD after concentrated treatment. A ...
    • Effect of D-Cycloserine on the Effect of Concentrated Exposure and Response Prevention in Difficult-to-Treat Obsessive-Compulsive Disorder: A Randomized Clinical Trial 

      Kvale, Gerd; Hansen, Bjarne; Hagen, Kristen; Abramowitz, Jonathan S.; Børtveit, Tore; Craske, Michelle G.; Franklin, Martin E.; Haseth, Svein; Himle, Joseph A; Hystad, Sigurd William; Kristensen, Beate; Launes, Gunvor; Lund, Anders; Solem, Stian; Öst, Lars Gøran (Peer reviewed; Journal article, 2020)
      Importance Evidence is lacking for viable treatment options for patients with difficult-to-treat obsessive-compulsive disorder (OCD). It has been suggested that D-cycloserine (DCS) could potentiate the effect of exposure ...
    • The functional connectome in obsessive-compulsive disorder: resting-state mega-analysis and machine learning classification for the ENIGMA-OCD consortium 

      Bruin, Willem B.; Abe, Yoshinari; Alonso, Pino; Anticevic, Alan; Backhausen, Lea L.; Balachander, Srinivas; Bargallo, Nuria; Batistuzzo, Marcelo C.; Benedetti, Francesco; Bertolin Triquell, Sara; Brem, Silvia; Calesella, Federico; Couto, Beatriz; Denys, Damiaan A. J. P.; Echevarria, Marco A. N.; Eng, Goi Khia; Ferreira, Sónia; Feusner, Jamie D.; Grazioplene, Rachael G.; Gruner, Patricia; Guo, Joyce Y.; Hagen, Kristen; Hansen, Bjarne Kristian Aaslie; Hirano, Yoshiyuki; Hoexter, Marcelo Q.; Jahanshad, Neda; Jaspers-Fayer, Fern; Kasprzak, Selina; Kim, Minah; Koch, Kathrin; Bin Kwak, Yoo; Kwon, Jun Soo; Lazaro, Luisa; Li, Chiang-Shan R.; Lochner, Christine; Marsh, Rachel; Martínez-Zalacaín, Ignacio; Menchon, Jose M.; Moreira, Pedro S.; Morgado, Pedro; Nakagawa, Akiko; Nakao, Tomohiro; Narayanaswamy, Janardhanan C.; Nurmi, Erika L.; Zorrilla, Jose C. Pariente; Piacentini, John; Picó-Pérez, Maria; Piras, Fabrizio; Piras, Federica; Pittenger, Christopher; Reddy, Janardhan Y. C.; Rodriguez-Manrique, Daniela; Sakai, Yuki; Shimizu, Eiji; Shivakumar, Venkataram; Simpson, Blair H.; Soriano-Mas, Carles; Sousa, Nuno; Spalletta, Gianfranco; Stern, Emily R.; Stewart, S. Evelyn; Szeszko, Philip R.; Tang, Jinsong; Thomopoulos, Sophia I.; Thorsen, Anders Lillevik; Tokiko, Yoshida; Tomiyama, Hirofumi; Vai, Benedetta; Veer, Ilya M.; Venkatasubramanian, Ganesan; Vetter, Nora C.; Vriend, Chris; Walitza, Susanne; Waller, Lea; Wang, Zhen; Watanabe, Anri; Wolff, Nicole; Yun, Je-Yeon; Zhao, Qing; van Leeuwen, Wieke A.; van Marle, Hein J. F.; van de Mortel, Laurens A.; van der Straten, Anouk; van der Werf, Ysbrand D.; Kvale, Gerd; Thompson, Paul M.; Stein, Dan J.; van den Heuvel, Odile A; van Wingen, Guido A. (Peer reviewed; Journal article, 2023)
      Current knowledge about functional connectivity in obsessive-compulsive disorder (OCD) is based on small-scale studies, limiting the generalizability of results. Moreover, the majority of studies have focused only on ...
    • Is sensory processing sensitivity related to treatment outcome in concentrated exposure and response prevention treatment for obsessive-compulsive disorder? 

      Holm, Silje Elisabeth Hasmo; Hansen, Bjarne; Kvale, Gerd; Eilertsen, Thomas; Hagen, Kristen; Solem, Stian (Peer reviewed; Journal article, 2019)
      It has been debated whether concentrated exposure and response prevention (ERP) is too difficult to tolerate for some patients. This report therefore uses quality assurance data looking into whether sensory processing ...
    • Mental health symptoms during the first months of the COVID-19 outbreak in Norway: A cross-sectional survey study 

      Hagen, Kristen; Solem, Stian; Stavrum, Anne-Kristin Støbakk; Eid, Jarle; Kvale, Gerd; Samdal, Oddrun; Hellard, Stephanie Francoise Claire Le (Peer reviewed; Journal article, 2021)
      Background: The COVID-19 pandemic has led to major social and economic changes that could impact public mental health. The main aim of the current study was to investigate mental health in Norway during the COVID-19 outbreak ...
    • Nordic OCD & Related Disorders Consortium: Rationale, design, and methods 

      Mataix-Cols, David; Hansen, Bjarne; Mattheisen, Manuel; Karlsson, Elinor K.; Addington, Anjené M.; Boberg, Julia; Djurfeldt, Diana R.; Halvorsen, Matthew; Lichtenstein, Paul; Solem, Stian; Lindblad-Toh, Kerstin; Haavik, Jan; Kvale, Gerd; Rück, Christian; Crowley, James J. (Journal article; Peer reviewed, 2019)
      Obsessive‐compulsive disorder (OCD) is a debilitating psychiatric disorder, yet its etiology is unknown and treatment outcomes could be improved if biological targets could be identified. Unfortunately, genetic findings ...
    • Obsessive-compulsive disorder (OCD) in patients with first- episode psychosis (FEP): A prospective study 

      Hagen, Kristen; Solem, Stian; Larsen, Tor Ketil; Joa, Inge; Kvale, Gerd; Hansen, Bjarne (Journal article; Peer reviewed, 2014)
    • Personality traits and hardiness as risk- and protective factors for mental distress during the COVID-19 pandemic: a Norwegian two-wave study 

      Lassen, Espen Rasmussen; Hagen, Kristen; Kvale, Gerd; Eid, Jarle; Le Hellard, Stephanie; Solem, Stian (Peer reviewed; Journal article, 2022)
      Background Several risk factors for anxious-depressive symptomatology during the COVID-19 pandemic have been established. However, few studies have examined the relationship between personality traits, hardiness, and such ...
    • Post-treatment predictors of follow-up status for obsessive-compulsive disorder treated with concentrated exposure therapy 

      Holm, Silje Elisabeth Hasmo; Hansen, Bjarne; Kvale, Gerd; Eilertsen, Thomas; Grøtte, Torun; Solem, Stian (Journal article; Peer reviewed, 2018)
      Recommended psychological treatment for obsessive-compulsive disorder (OCD) is cognitive behavioral therapy (CBT) including exposure with response prevention (ERP). Previous studies have identified few consistent predictors ...