Is a Ruminative Thinking Style Related to Obsessive-Compulsive Symptom Severity Beyond Its Associations with Depressive and Anxiety Symptom Severity?

Previous studies suggest that a ruminative thinking style (RTS) is positively associated with the severity of obsessive-compulsive symptoms and might be involved in the maintenance of obsessive-compulsive disorder (OCD). We sought to replicate this association in a sample of individuals with OCD, controlling for depressive and anxiety symptom severity, and to extend previous studies by including an interview measure of obsessive-compulsive symptom severity. A sample of 140 individuals diagnosed with OCD participated in a cross-sectional observational study. Participants completed questionnaire measures of an RTS as well as obsessive-compulsive, depressive, and anxiety symptom severity. Obsessive-compulsive symptom severity was additionally assessed with an interview. When statistically controlling for depressive and anxiety symptom severity, an RTS continued to predict the questionnaire, but not the interview measure of obsessive-compulsive symptom severity. We discuss possible explanations for these mixed findings, emphasizing the unique aspects of each measure, and consider implications for further research on OCD.