Abstract
BackgroundThe Obsessive-Compulsive Inventory-Revised (OCI-R) was designed to evaluate the severity of obsessive-compulsive symptoms in both clinical and non-clinical samples. The aim of the study was to evaluate the psychometric properties of a Chinese version of this scale.MethodsThe Chinese version of the OCI-R was administered to both a non-clinical sample (209 undergraduate students) and a clinical sample (56 obsessive-compulsive disorder (OCD) patients). Confirmatory factor analysis was conducted to examine the construct validity of the OCI-R in the non-clinical sample. The internal consistency at baseline and test-retest reliabilities at 4-week interval was examined in both the non-clinical and clinical samples.ResultsThe confirmatory factor analysis of the non-clinical sample confirmed a 6-factor model suggested by the original authors of the instrument (df = 120, RMSEA = 0.068, CFI = 0.88, NNFI = 0.85, GFI = 0.89). The internal consistency and test-retest reliability were at an acceptable range for both the non-clinical and clinical samples. The OCI-R also showed good clinical discrimination for patients with OCD from healthy controls.ConclusionsThe Chinese version of the OCI-R is a valid and reliable instrument for measuring OCD symptoms in the Chinese context.
Highlights
The Obsessive-Compulsive Inventory-Revised (OCI-R) was designed to evaluate the severity of obsessive-compulsive symptoms in both clinical and non-clinical samples
Even though the majority of the coefficient alphas for the subscales were lower than those reported by Foa et al [9], they had an acceptable range of internal consistency (Washing = 0.64, Obsessing = 0.77, Hoarding = 0.66, Ordering = 0.63, Checking = 0.61, Neutralizing = 0.53)
The results suggest that the Chinese version of the OCI-R has a good fit for the model of the original and other western versions of OCI-R developed by Foa et al [9]
Summary
The Obsessive-Compulsive Inventory-Revised (OCI-R) was designed to evaluate the severity of obsessive-compulsive symptoms in both clinical and non-clinical samples. Several selfreporting questionnaires evaluating the severity of OCD have been developed, such as the Yale Brown ObsessiveCompulsive Scale [3], the Paudua Inventory [4], the Maudsley Obsessive-Compulsive Inventory [5], the Vancouver Obsessional Compulsive Inventory [6], and the Schedule of Compulsions, Obsessions, and Pathological Impulses [7] These interview-based measures can be time-consuming and expensive, requiring interviewer training and establishment of interviewer reliability. The original OCI consists of seven subscales, namely Washing (eight items), Checking (nine items), Mental Neutralizing (six items), Obsessing (eight items), Ordering (five items), Hoarding (three items), and Doubting (three items) It is rated on a five-point Likert scale to assess the frequency of symptoms and the associated distress. The utility of this scale in clinical setting was limited by its length
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