Development and validation of the Japanese version of the obsessive-compulsive inventory.

Ryotaro Ishikawa,Osamu Kobori,Eiji Shimizu

doi:10.1186/1756-0500-7-306

Abstract

BackgroundThe Obsessive-Compulsive Inventory (OCI) was designed to evaluate the severity of obsessive-compulsive symptoms in both clinical and non-clinical samples. The aim of the study was to develop a Japanese version of this scale (OCI-J) and validate it in both non-clinical and clinical Japanese samples.FindingsIn Study 1, the OCI-J, the Maudsley Obsessional Compulsive Inventory (MOCI), and measures of anxiety and depression were administered to 150 undergraduate students (non-clinical sample) in order to investigate the internal consistency and convergent validity of the OCI-J. Furthermore, 118 non-clinical participants completed the OCI-J after a 2-week interval to determine the test-retest reliability. In Study 2, OCD participants (n = 35), anxiety control participants with panic disorder (n = 22), and healthy control participants (n = 37) completed the OCI-J in order to test its clinical discrimination ability.Correlational analysis indicated moderate to high correlations between the subscales and total scores of the OCI-J and MOCI. In addition, the OCI-J and its subscales demonstrated satisfactory test-retest reliabilities. Finally, the OCI-J showed good clinical discrimination for patients with OCD from healthy and anxiety controls.ConclusionsThe OCI-J is a valid and reliable instrument for measuring OCD symptoms in both clinical and non-clinical samples of Japanese.

Highlights

The Obsessive-Compulsive Inventory (OCI) was designed to evaluate the severity of obsessivecompulsive symptoms in both clinical and non-clinical samples
Our findings demonstrated that the OCI-J is a valid and reliable instrument for measuring Obsessive-compulsive disorder (OCD) symptoms in both clinical and nonclinical samples of Japanese
Several questionnaires have been developed that evaluate the severity of OCD symptoms in the Japanese population, such as the Japanese versions of the Yale-Brown Obsessive Compulsive Scale (Y-BOCS) [6] and Maudsley Obsessive-Compulsive Inventory (MOCI-J) [7], none are suitable for quick, effective clinical assessments

Summary

Introduction

The Obsessive-Compulsive Inventory (OCI) was designed to evaluate the severity of obsessivecompulsive symptoms in both clinical and non-clinical samples. Researchers administered the Yale-Brown Obsessive Compulsive Scale (Y-BOCS) symptom checklist [4] to 343 Japanese OCD patients to examine whether symptom dimensions were stable across cultures [5]. The scale yields three severity scores: obsessions, compulsions, and an overall score It possesses a 67-item symptom checklist for an accurate assessment of symptoms. Wu et al [14] raised a number of critical points regarding the symptom checklist of the self-report Y-BOCS, including the validity of the rationally based assignment of symptoms to categories, the inadequacy of the self-report format to distinguish OCD from non-OCD samples, and issues surrounding the wording of items [14,15]

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