An interventional study of Intensive cognitive-behavioral treatment with exposure / response prevention in Obsessive-Compulsive Disorder (OCD), sponsored by University of Iceland. Recruiting at 1 site in Iceland. Open to participants aged 12 Years to 18 Years. Per ClinicalTrials.gov, last updated 2026-09-10.
Sponsored by University of Iceland · Not applicable, Interventional, and Treatment
The aim of the study is to examine the effectiveness of OCD treatment delivered in a group format for adolescents during a two week intensive summer treatment program.
The present study evaluates the effectiveness of the Icelandic adaptation of the Pediatric OCD Summer Program, originally developed by the British Columbia Children's Hospital in Vancouver, Canada. Specifically, it investigates the efficacy of this intensive intervention for Icelandic adolescents with OCD and their parents. The study also examines how executive functioning and emotion regulation may change over the course of treatment and influence outcomes, particularly among adolescents with co-occurring neurodevelopmental conditions such as ADHD and/or autism. The program will be implemented annually as an open clinical trial to accumulate a larger dataset and address these research questions comprehensively.
635 studies on the registry are indexed under Obsessive-Compulsive Disorder; 166 are open to participants now.
This study's planned enrollment of 70 is above the median of 45 across 520 interventional studies indexed under Obsessive-Compulsive Disorder.
Browse Obsessive-Compulsive Disorder studies →University of Iceland is the lead sponsor of 35 studies on the registry; 9 are open to participants now.
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This cognitive-behavioral exposure / response prevention program is delivered intensively over two consecutive weeks, consisting of daily 2.5-hour sessions across 10 days. Each group includes 6-8 adolescents, with every participant paired with an individual therapist for each session, though therapists rotate daily. At the outset, adolescents receive workbooks and psychoeducation on the nature of obsessive thoughts and compulsive behaviors, along with strategies to manage symptoms and reduce impairment. The primary focus of the program is individualized exposure exercises conducted with a therapist during each session. Designed for adolescents aged 12-18, the program also includes parent sessions, in which parents learn to manage anxiety-driven behaviors at home and reduce family accommodation.
Behavioral: Intensive cognitive-behavioral treatment with exposure / response prevention
This cognitive-behavioral exposure / response prevention program is delivered intensively over two consecutive weeks, consisting of daily 2.5-hour sessions across 10 days. Each group includes 6-8 adolescents, with every participant paired with an individual therapist for each session, though therapists rotate daily. At the outset, adolescents receive workbooks and psychoeducation on the nature of obsessive thoughts and compulsive behaviors, along with strategies to manage symptoms and reduce impairment. The primary focus of the program is individualized exposure exercises conducted with a therapist during each session. Designed for adolescents aged 12-18, the program also includes parent sessions, in which parents learn to manage anxiety-driven behaviors at home and reduce family accommodation.
Behavioral Rating Inventory of Executive Function (BRIEF)
A questionnaire designed to assess executive functioning in children and adolescents aged 5 to 18 years (Gioia et al., 2000). The questionnaire consists of 86 items with three response options: never = 1, sometimes = 2, and often = 3. A higher score on the BRIEF indicates greater executive functioning difficulties. The first 72 items are divided into eight clinical subscales that measure different aspects of executive function. These clinical subscales fall under two broader indices: the Behavioral Regulation Index (BRI) and the Metacognition Index (MI), which together form a Global Executive Composite (GEQ) score. The psychometric properties of the Icelandic version have proven to be acceptable.
Time frame: Baseline, 1 week after treatment, 6 month follow-up, 12 month follow-up
Children's Yale-Brown Obsessive Compulsive Scale (CY-BOCS)
This is a semi-structured interview (Scahill et al., 1997) intended to assess the symptoms and severity of obsessive compulsive disorder in children and adolescents aged 6-17 years. The scores range from 0-40, a higher score indicating more OCD related impairment with a clinical cut-off score of 15. The interview is conducted either with both the child and parent present or, in some cases, separately. The interview method depends, among other things, on the child´s age and developmental level. This interview is widely used, both for clinical purposes and in research, and has been translated into many languages. Today, it is considered the gold standard for assessing the severity of OCD symptoms and treatment response and is the most commonly and widely accepted tool for such evaluations (Mataix-Cols et al, 2016; Skarphedinsson et al, 2017). The interview has demonstrated strong psychometric properties (Cook et al., 2015; Højgaard et al., 2017).
Time frame: Baseline, 1 week after treatment, 6 month follow-up, 12 month follow-up
The Child Obsessive-Compulsive Impact Scale (COIS-R)
This is a 55-item questionnaire that assesses functional impairment due to OCD in the child's most important environments (home, school, and social situations) (Piacentini et al, 2007). Each question is rated on a Likert scale from 0-3 and a higher score indicates more OCD related impairment. The adolescents will complete the child/adolescent form and parents will complete the parent form.
Time frame: Baseline, 1 week after treatment, 6 month follow-up, 12 month follow-up
Revised Children 's Anxiety and Depression Scale (RCADS)
This is a commonly used questionnaire to screen for anxiety and depressive disorders and to assess changes following an intervention. The RCADS is a 47-item questionnaire designed for parents and children (ages 8-17) and includes the following scales: Generalized Anxiety Disorder, Separation Anxiety Disorder, Social Anxiety Disorder, Panic Disorder, Obsessive-Compulsive Disorder, and Depressive Symptoms. Items are rated on a four-point scale and higher scores indicate more difficulties: 0 = never, 1 = sometimes, 2 = often, 3 = always. The Icelandic version has acceptable psychometric properties in both general and clinical populations.
Time frame: Baseline, 1 week after treatment, 6 month follow-up, 12 month follow-up
Family Accommodation Scale for OCD- Self-Rated (FAS-SR)
This is a 19-item scale developed to assess the extent to which the family attempts to accommodate the child´s symptoms to reduce distress. The scale is completed by parents and includes items such as how much the family tries to reassure the child, alter plans and activities, or help the child to avoid objects, places, or situations that cause distress. Scores range from 0-48 and higher scores indicate more family accommodation. The scale has acceptable psychometric properties, including internal consistency of 0.90 and high correlation with the standardized Family Accommodation Interview (Pinto et al., 2013).
Time frame: Baseline, 1 week after treatment, 6 month follow-up, 12 month follow-up
Plan to share: No — As the study includes repeated measures of a clinical child population, parts of the data will be classified as sensitive personal data and thus restricted by the permit from the National Bioethics Committee of Iceland.
Started Jun 2026 (actual). Primary completion is estimated for Sep 2030, 51 months after the start.
Of 234 non-industry interventional studies with no phase under Obsessive-Compulsive Disorder, half reached primary completion within 43 months of starting (the median), counting those still running; a quarter within 22 and three quarters within 65. This study's planned 51 months is above that.
Counting every sponsor, half of 237 studies reached it within 43 months; a quarter within 22 and three quarters within 65.
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