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Chulalongkorn Medical Journal

Abstract

Background: Obsessive-compulsive disorder is a disease of various symptoms and severity. In Thailand, currently there is no tool to identify obsessive-compulsive disorder in children and adolescents. Objective: To evaluate the validity and reliability of the Thai version of Children’s Yale-Brown Obsessive Compulsive Scale (CY-BOCS). Methods: This study is a cross-sectional descriptive study to test the content validity of questionnaire using the index of item-objective congruence (IOC) from experts’ opinions and the internal consistency reliability in the sample of 61 child-psychiatrists in secondary, tertiary and psychiatric hospitals in Thailand that assessed children and/or adolescent patients with obsessive compulsive disorder within the past one year. Results: The results showed that the content validity of the questionnaire met the standards, item-objective congruence (IOC) of CY-BOCS obsessions checklist, CY-BOCS compulsions checklist, obsessive severity subscale and compulsive severity subscale are 0.835, 0.812 and 0.945, respectively; and the total mean of IOC of all items was 0.841. The internal consistency reliability of this questionnaire by using Kuder-Richardson method was 0.857 for obsessive severity subscale, 0.850 for compulsive severity subscale and 0.932 for obsessive severity subscale and compulsive severity subscale. Conclusions: The Thai version of CY-BOCS has acceptable content validity and reliability. This questionnaire can be a tool to assess obsessive compulsive disorders in children and adolescents. Therefore, the questionnaire can be used for the benefit of diagnosis, following-up treatments and further researches

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