• The Bergen 4-day OCD treatment delivered in a group setting: 12-month follow-up 

      Hansen, Bjarne; Hagen, Kristen; Øst, Lars Gøran; Solem, Stian; Kvale, Gerd (Peer reviewed; Journal article, 2018-05-03)
      The Bergen 4-day concentrated exposure treatment (cET) for obsessive-compulsive disorder (OCD) has proven highly acceptable; with practically no drop-out and a 6 month remission rate of nearly 70%. The aim of the present ...
    • 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 (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 obsessive-compulsive disorder : Does it work in a new clinical setting? 

      Launes, Gunvor; Laukvik, Inger Lill; Sunde, Tor; Klovning, Ingrid; Hagen, Kristen; Solem, Stian; Øst, Lars Gøran; Hansen, Bjarne; Kvale, Gerd (Peer reviewed; Journal article, 2019-05-17)
      Sørlandet Hospital in Norway has a history of offering patients with obsessivecompulsive disorder (OCD) cognitive behavior group therapy using 12 weekly sessions of 2.5 h each. A previous evaluation of this treatment has ...
    • The Bergen 4-Day Treatment for Panic Disorder: A Pilot Study 

      Hansen, Bjarne; Kvale, Gerd; Hagen, Kristen; Hjelle, Kay Morten; Solem, Stian; Bø, Beate Hatlelid; Øst, Lars Gøran (Peer reviewed; Journal article, 2018-06-26)
      The current article reports on the findings from a pilot treatment study on panic disorder (PD) with or without agoraphobia. Consecutively referred patients were included and treated with the Bergen 4-day treatment format. ...
    • The Bergen 4-day treatment for panic disorder: adapting to COVID-19 restrictions with a hybrid approach of face-to-face and videoconference modalities 

      Hjelle, Kay Morten; Eide, Thorstein Olsen; Thorsen, Anders Lillevik; Kvale, Gerd; Hagen, Kristen; Snorrason, Ivar; Björgvinsson, Thröstur; Hansen, Bjarne Kristian Aaslie (Journal article; Peer reviewed, 2023)
      Background The Bergen 4-day treatment (B4DT) is a concentrated exposure-based therapy that has been shown to be effective in the treatment of anxiety disorders. The current study sought to examine the effectiveness of ...
    • 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 (Journal article; Peer reviewed, 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 (Journal article; Peer reviewed, 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 to ...
    • 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 (Journal article; Peer reviewed, 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 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)
      Cognitive behavioral therapy (CBT) has strong research support for obsessive-compulsive disorder (OCD). However, less is known about how CBT performs when delivered in routine clinical care. A systematic review and ...
    • 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)
    • Concentrated transdiagnostic and cross-disciplinary group treatment for patients with depression and with anxiety: a pilot study 

      Kvale, Gerd; Wilhelmsen-Langeland, Ane; Jürgensen, Marte; Hystad, Sigurd William; Öst, Lars Gøran; Søfteland, Eirik; Børtveit, Tore (Journal article; Peer reviewed, 2022)
      Background: A number of treatment approaches have shown efficacy for depression and/or anxiety, yet there is a paucity of research on potentially cost-effective concentrated approaches. Based on our previous experience ...
    • Diffusion Tensor Imaging Before and 3 Months After Concentrated Exposure Response Prevention in Obsessive-Compulsive Disorder 

      Brecke, Vilde; Thorsen, Anders Lillevik; Ousdal, Olga Therese; Vriend, Chris; Alnæs, Dag; Hagen, Kristen; Hansen, Bjarne; Kvale, Gerd; van den Heuvel, Odile A (Journal article; Peer reviewed, 2021)
      Background: Subtle differences in white matter microstructure have been found in obsessive-compulsive disorder (OCD) compared to controls using diffusion tensor imaging (DTI), but it is unclear if and how this change after ...
    • The Dimensional Obsessive-Compulsive Scale:Development and Validation of a Short Form (DOCS-SF) 

      Eilertsen, Thomas; Hansen, Bjarne; Kvale, Gerd; Abramowitz, Jonathan S.; Holm, Silje Elisabeth Hasmo; Solem, Stian (Peer reviewed; Journal article, 2017-09-05)
      Accurately and reliably measuring the presence and severity of Obsessive-Compulsive Disorder (OCD) symptoms is essential for both routine clinical work and research. The current study investigated psychometric properties ...
    • Disentangling Within- and Between-Person Effects During Response Inhibition in Obsessive-Compulsive Disorder 

      Hagland, Pernille; Thorsen, Anders Lillevik; Ousdal, Olga Therese; Gjestad, Rolf; de Wit, Stella J.; Hansen, Bjarne Kristian Aaslie; Hagen, Kristen; Kvale, Gerd; van den Heuvel, Odile A. (Journal article; Peer reviewed, 2021)
      Background: Obsessive-compulsive disorder (OCD) has been related to worse performance, abnormal brain activity, and functional connectivity during response inhibition. Whether these findings are indications of stable traits ...
    • 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 (Journal article; Peer reviewed, 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 (Journal article; Peer reviewed, 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 ...
    • Effects of Bergen 4-Day Treatment on Resting-State Graph Features in Obsessive-Compulsive Disorder 

      Thorsen, Anders Lillevik; Vriend, Chris; de Wit, Stella J.; Ousdal, Olga Therese; Hagen, Kristen; Hansen, Bjarne; Kvale, Gerd; van den Heuvel, Odile A (Journal article; Peer reviewed, 2020)
      Background Exposure and response prevention is an effective treatment for obsessive-compulsive disorder (OCD), but it is unclear how symptom reduction is related to changes in the brain. We aimed to determine the effects ...
    • Evaluation of novel concentrated interdisciplinary group rehabilitation for patients with chronic illnesses: Protocol for a nonrandomized clinical intervention study 

      Kvale, Gerd; Frisk, Bente; Jürgensen, Marte; Børtveit, Tore; Ødegaard-Olsen, Øystein Theodor; Wilhelmsen-Langeland, Ane; Aarli, Bernt Bøgvald; Sandnes, Kristina; Rykken, Sidsel; Haugstvedt, Anne; Hystad, Sigurd William; Søfteland, Eirik (Journal article; Peer reviewed, 2021)
      Background: An aging population with a growing burden of chronic complex illnesses will seriously challenge the public health care system. Consequently, novel and efficacious treatment approaches are highly warranted. Based ...
    • Implementation of the Bergen 4-day treatment for obsessive compulsive disorder in Iceland 

      Davidsdottir, Soley Drofn; Sigurjonsdottir, Olafia; Ludvigsdóttir, Sigurbjorg Jona; Hansen, Bjarne; Laukvik, Inger Lill; Hagen, Kristen; Björgvinsson, Thröstur; Kvale, Gerd (Peer reviewed; Journal article, 2019)
      Objective: The purpose of this study was to evaluate the first implementation outside of Norway of the Bergen 4-day treatment for Obsessive Compulsive Disorder (OCD), an innovative and effective treatment format with high ...