Abstract
The Disruptive Behavior Disorders Rating Scale (DBDRS) is widely used in many countries as a questionnaire to measure each symptom of Attention-deficit/hyperactivity disorder (ADHD), oppositional defiant disorder (ODD), and conduct disorder (CD) in children and adolescents. This study’s objectives were (1) to examine the psychometric properties of the Japanese version of the DBDRS (J-DBDRS), measuring the symptoms of ADHD, ODD, and CD in children and adolescents reported by parents/caregivers, (2) to estimate the prevalence of ADHD, ODD, and CD in Japanese children and adolescents using the J-DBDRS, and (3) to examine the relationship between its symptoms, anxiety, depression, and irritability. A total of 2442 parents and caregivers who had children and adolescents aged 6–15 participated in the study. The results confirmed the structural validity for the four-factor structure, internal consistency, test-retest reliability, and convergent validity of the J-DBDRS. According to the results, the psychometric properties of the J-DBDRS; the characteristics of the estimated prevalence of ADHD, ODD, and CD in Japan; and the associations between each mental symptom were discussed.