title: Development and validation of the Japanese version of the obsessive-compulsive inventory.
abstract: BACKGROUND
  The 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.
  
  
  RESULTS
  In 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.
  
  
  CONCLUSIONS
  The OCI-J is a valid and reliable instrument for measuring OCD symptoms in both clinical and non-clinical samples of Japanese.
authors.affiliation: Research Fellow of the Japan Society for the Promotion of Science, Japan. ishikamyr124@gmail.com.
authors.forename: Ryotaro
authors.initials: R
authors.lastname: Ishikawa
authors.forename: Osamu
authors.initials: O
authors.lastname: Kobori
authors.forename: Eiji
authors.initials: E
authors.lastname: Shimizu
mesh_terms: D000293:Adolescent; D000328:Adult; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D009771:Obsessive-Compulsive Disorder / Q000175:diagnosis*; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires; D055815:Young Adult