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dc.contributor.authorKvale, Gerd
dc.contributor.authorHansen, Bjarne
dc.contributor.authorHagen, Kristen
dc.contributor.authorAbramowitz, Jonathan S.
dc.contributor.authorBørtveit, Tore
dc.contributor.authorCraske, Michelle G.
dc.contributor.authorFranklin, Martin E.
dc.contributor.authorHaseth, Svein
dc.contributor.authorHimle, Joseph A
dc.contributor.authorHystad, Sigurd William
dc.contributor.authorKristensen, Beate
dc.contributor.authorLaunes, Gunvor
dc.contributor.authorLund, Anders
dc.contributor.authorSolem, Stian
dc.contributor.authorÖst, Lars Gøran
dc.PublishedJAMA Network Open. 2020, 3 (8), 1-13.
dc.description.abstractImportance 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 and response prevention (ERP) treatment, but the hypothesis has not been tested among patients with difficult-to-treat OCD. Objective To evaluate whether DCS potentiates the effect of concentrated ERP among patients with difficult-to-treat OCD. Design, Setting, and Participants The study was a randomized placebo-controlled triple-masked study with a 12-month follow-up. Participants were adult outpatients with difficult-to-treat OCD. A total of 220 potential participants were referred, of whom 36 did not meet inclusion criteria and 21 declined to participate. Patients had either relapsed after (n = 100) or not responded to (n = 63) previous ERP treatment. A total of 9 specialized OCD teams within the public health care system in Norway participated, giving national coverage. An expert team of therapists from the coordinating site delivered treatment. Inclusion of patients started in January 2016 and ended in August 2017. Data analysis was conducted February to September 2019. Interventions All patients received individual, concentrated ERP treatment delivered during 4 consecutive days in a group setting (the Bergen 4-day treatment format) combined with 100 mg DCS, 250 mg DCS, or placebo. Main outcomes and Measures Change in symptoms of OCD and change in diagnostic status. Secondary outcomes measures included self-reported symptoms of OCD, anxiety, depression, and quality of life. Results The total sample of 163 patients had a mean (SD) age of 34.5 (10.9) years, and most were women (117 [71.8%]). They had experienced OCD for a mean (SD) of 16.2 (10.2) years. A total of 65 patients (39.9%) were randomized to receive 100 mg DCS, 67 (41.1%) to 250 mg of DCS, and 31 (19.0%) to placebo. Overall, 91 (56.5%) achieved remission at posttreatment, while 70 (47.9%) did so at the 12-month follow-up. There was no significant difference in remission rates among groups. There was a significant reduction in symptoms at 12 months, and within-group effect sizes ranged from 3.01 (95% CI, 2.38-3.63) for the group receiving 250 mg DCS to 3.49 (95% CI, 2.78-4.18) for the group receiving 100 mg DCS (all P < .001). However, there was no significant effect of treatment group compared with placebo in obsessive-compulsive symptoms (250 mg group at posttreatment: d = 0.33; 95% CI, −0.10 to 0.76; 100 mg group at posttreatment: d = 0.36; 95% CI, −0.08 to 0.79), symptoms of depression and anxiety (eg, Patient Health Questionnaire–9 score among 250 mg group at 12-month follow-up: d = 0.30; 95% CI, −0.17 to 0.76; Generalized Anxiety Disorder–7 score among 100 mg group at 12-month follow-up: d = 0.27; 95% CI, −0.19 to 0.73), and well-being (250 mg group: d = 0.10; 95% CI, −0.42 to 0.63; 100 mg group: d = 0.34; 95% CI, −0.19 to 0.86). No serious adverse effects were reported. Conclusions and Relevance In this study, DCS did not potentiate ERP treatment effect, but concentrated ERP treatment was associated with improvement. Trial Registration identifier: NCT02656342en_US
dc.publisherAmerican Medical Associationen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.titleEffect of D-Cycloserine on the Effect of Concentrated Exposure and Response Prevention in Difficult-to-Treat Obsessive-Compulsive Disorder: A Randomized Clinical Trialen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.rights.holderCopyright 2020 Kvale G et al.en_US
dc.source.journalJAMA Network Openen_US
dc.identifier.citationJAMA Network Open. 2020, 3 (8), e2013249.en_US

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