An interventional study of Bergen Four-Day Treatment (B4DT) in Obsessive Compulsive Disorder (OCD), sponsored by Tampere University Hospital. Recruiting at 1 site in Finland. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-08.
Sponsored by Tampere University Hospital · Not applicable, Interventional, and Treatment
The aim of this study is to expand access to Bergen Four-Day Treatment (B4DT) in Finland and to integrate it into psychiatric care pathways at Tampere University Hospital (TAYS). A Bergen team has been established within TAYS Psychiatry and has been trained in collaboration with the B4DT team from HUS and the Norwegian developers. The objective of this study is to enhance understanding of the model's adaptability to the Finnish healthcare system, evaluate healthcare professionals' attitudes toward the intervention, and assess treatment outcomes.
The aim is to recruit approximately 35 patients for the study. Patients will be recruited from a minimum of three groups (15 patients) and up to a maximum of six groups (35 patients). The criteria for admission to B4DT and for participation in the study are identical. The treatment and the study may include patients receiving specialized psychiatric care at Tampere University Hospital who have been diagnosed with obsessive-compulsive disorder and who experience significant impairment due to their symptoms. In addition, personnel from TAYS Psychiatry who recommend and refer patients for B4DT will be recruited for the study. The estimated number of participating staff members is approximately 30.
635 studies on the registry are indexed under Obsessive-Compulsive Disorder; 166 are open to participants now.
This study's planned enrollment of 65 is above the median of 45 across 520 interventional studies indexed under Obsessive-Compulsive Disorder.
Browse Obsessive-Compulsive Disorder studies →Tampere University Hospital is the lead sponsor of 212 studies on the registry; 56 are open to participants now.
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Other: Bergen Four-Day Treatment (B4DT)
The intervention starts with a pre-assessment, during which patients' motivation, expectations, and willingness to engage in exposure practice are assessed. After the pre-assessment, patients participate in a four-day intensive treatment period based on exposure and response prevention. The intensive phase is an individualized intervention delivered within a group framework. This phase is followed by a three-month period of independent practice, with a couple of appointments with the therapist. Changes in patients' symptoms, daily functioning, and well-being are assessed. In addition, healthcare professionals' attitudes toward the intervention will be examined.
Yale-Brown Obsessive-Compulsive Scale, Self-Report (Y-BOCS-SR)
Changes in OCD symptoms will be assessed using the Yale-Brown Obsessive-Compulsive Scale, Self-Report (Y-BOCS-SR), a ten-item self-report measure with each item rated from 0 to 4. Total scores range from 0 to 40, with higher scores indicating more severe symptoms.
Time frame: From pre-assessment to the end of follow-up approximately four to six months.
Obsessive-Compulsive Inventory - Revised (OCI-R)
In addition to the Y-BOCS, changes in OCD symptoms will be assessed using the Obsessive-Compulsive Inventory - Revised (OCI-R), which consists of 18 items, each rated from 0 to 4, with total scores ranging from 0 to 72 points. Higher scores indicate more severe symptoms.
Time frame: From pre-assessment to the end of follow-up approximately four to six months.
Client Satisfaction Questionnaire (CSQ-8)
Patients will be asked about their satisfaction with the treatment using the Client Satisfaction Questionnaire (CSQ-8). The CSQ-8 consists of eight items, each rated on a scale from 1 to 4, with total scores ranging from 8 to 32. Higher scores indicate greater satisfaction with the treatment.
Time frame: From pre-assessment to the end of follow-up approximately four to six months.
Credibility and Expectancy Questionnaire (CEQ)
Patients' treatment expectations will be assessed using the Credibility and Expectancy Questionnaire (CEQ). The CEQ includes six items: four rated from 1 to 9 and two from 0% to 100%, with higher scores indicating greater expectations and confidence in the treatment.
Time frame: approximately four months
Self-report for healthcare professionals (AIM, IAM, FIM)
The acceptability, appropriateness, and feasibility of the treatment will be assessed among healthcare professionals using a combination of three subscales: the Acceptability of Intervention Measure (AIM), Intervention Appropriateness Measure (IAM), and Feasibility of Intervention Measure (FIM). The AIM, IAM, and FIM each consist of four items rated on a five-point scale. Accordingly, the total score for each scale ranges from 4 to 20 points. The total 12-item score ranges from 12 to 60, with higher scores indicating greater overall treatment acceptability.
Time frame: approximately four months
Patient Health Questionnaire (PHQ-9)
Secondarily, the aim is to investigate whether there are changes in patients' depressive symptoms during the treatment. Depressive symptoms will be assessed using the Patient Health Questionnaire (PHQ-9), which consists of nine items, each rated from 0 to 3, with total scores ranging from 0 to 27. Higher scores indicate more severe depressive symptoms.
Time frame: From pre-assessment to the end of follow-up approximately four to six months.
Generalized Anxiety Disorder Scale (GAD-7)
In addition to depressive symptoms, the aim is to examine whether there are changes in patients' anxiety symptoms during the treatment. Anxiety symptoms will be assessed using the Generalized Anxiety Disorder Scale (GAD-7), which consists of seven items scored from 0 to 3, with total scores ranging from 0 to 21. Higher scores indicate more severe anxiety symptoms.
Time frame: From pre-assessment to the end of follow-up approximately four to six months.
Work and Social Adjustment Scale (WSAS)
Work and social functioning will be assessed using the Work and Social Adjustment Scale (WSAS), a five-item measure rated on a Likert scale from 0 ("Not at all") to 8 ("Very much"). Total scores range from 0 to 40, with higher scores indicating greater impairment in work and social functioning.
Time frame: From pre-assessment to the end of follow-up approximately four to six months
Warwick-Edinburgh Mental Wellbeing Scale (WEMWBS)
General wellbeing will be assessed using the Warwick-Edinburgh Mental Wellbeing Scale (WEMWBS), which consists of 14 items rated on a five-point Likert scale from 1 "Never" to 5 "All the time," yielding total scores from 14 to 70. Higher scores indicate higher perceived wellbeing.
Time frame: From pre-assessment to the end of follow-up approximately four to six months.
EuroQol 5-Dimension Questionnaire (EQ-5D)
Quality of life will be assessed using the EuroQol 5-Dimension Questionnaire (EQ-5D), which consists of five items scored from 1 to 5, with total scores ranging from 5 to 25. Higher scores indicate lower perceived well-being. In addition, the EQ-5D includes a one-item scale for self-assessed well-being ranging from 0 to 100%. Higher percentages indicate higher perceived well-being.
Time frame: From pre-assessment to the end of follow-up approximately four to six months.
Plan to share: No — The information sheet for research participants in this study states that the study data will not be shared and will be available only to researchers working for the Wellbeing Services County of Pirkanmaa. Patients will provide written consent only for this specific use of their personal data. This procedure has been approved by the ethics committee.
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Obsessive-Compulsive Disorder →