CLINICAL INVESTIGATION OF THE ICD-10 SUBCATEGORIES FOR OBSESSIVE-COMPULSIVE DISORDER

To examine the validity of ICD-10 subcategories for obsessive-compulsi ve disorder (OCD), the Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) was applied to 53 OCD patients. The ratios of Y-BOCS compulsions subsc ore to obsessions subscore were calculated. The group with ratios arou nd one consisted of patients diagnosed in three subcategories (F42.0, F42.1 and F42.2). This suggests that subjective subcategorization such as ICD-10 may be inadequate to differentiate between predominantly ob sessive and compulsive patients compared with differentiation by quant itative assessment such as tile Y-BOCS ratio. Thus, in selecting the a ppropriate therapeutic methods, we emphasize the usefulness of quantit ative assessment in clinical settings.