The Obsessive-Compulsive Inventory-Revised (OCI-R): Further psychometric examination and its adaptation to the DSM-5 in Iranian patients with obsessive-compulsive disorder

Abstract

The Obsessive-Compulsive Inventory-Revised (OCI-R) as a self-report questionnaire evaluates six obsessive-compulsive (OC) symptoms. The present study aimed to further evaluate the psychometric properties of a pre-existing Persian version of the OCI-R (i.e., six-factor structure, reliability and validity) and its adaptation to the DSM-5 recommendations in patients with obsessive-compulsive disorder (OCD). Three hundred and two individuals with OCD completed the OCI-R and other measures of OCD and general psychological distress. The results showed that the Persian version of the OCI-R replicated the six-factor model of the original OCI-R. Also, the five-factor structure of the scale with deleting the hoarding subscale's items had a better fit to the data than the original six-factor OCI-R. In addition, the Persian version of the OCI-R has been found to have good reliability (e.g., internal consistency and test-retest) and convergent and discriminant validity. The findings suggest that the Persian version of the OCI-R has a six-factor structure similar to the original scale. In addition, a five-factor structure by removing the hoarding subscale's items adapted to the DSM-5 is a valid scale in Iranian OCD patients.