Psychometric validation of a Danish version of the Obsessive Beliefs Questionnaire-Child Version (OBQ-CV)

Aim: The aim of the study was to examine the psychometric properties of a Danish version of the Obsessive Beliefs Questionnaire - Child Version (OBQ-CV). The OBQ-CV assesses dysfunctional beliefs concerning responsibility/threat estimation, perfectionism/uncertainty, and importance/control of thoughts, which according to cognitive theories are important in the development and maintenance of obsessive-compulsive disorder (OCD). Methods: The study included a pediatric sample (age 7-17 years) consisting of 57 children and adolescents with OCD, 49 children and adolescents with an anxiety disorder (AD), and 58 typically developing (TD) children and adolescents without a psychiatric diagnosis. All participants completed the OBQ-CV and the Child Behavior Checklist - the School Age Scales (CBCL/6-18). The Children's Yale-Brown Obsessive-Compulsive Scale (CY-BOCS) was used to assess OCD symptom severity in the OCD group. Results: Confirmatory factor analyses supported the three-factor structure and thereby the construct validity of the OBQ-CV. Gender was not associated with subscale scores, whereas age influenced the subscale scores differently in the three groups. Reliability analyses showed acceptable to excellent internal consistency and acceptable test-retest reliability of the instrument. There were significant differences between the OCD group and the TD group, supporting the criterion validity. Results on convergent validity were mixed. Conclusions: Overall, results supported the reliability and validity of the Danish OBQ-CV and thus the use of the questionnaire for future clinical and research purposes.