Maudsley Obsessional-Compulsive Inventory: obsessions and compulsions in a nonclinical sample.

Obsessive-compulsive disorder is increasingly being studied in nonclinical samples. The self-report instruments used to select these samples, however, have not been validated with a diagnostic interview. This study thus investigated the predictive validity of the Maudsley Obsessional-Compulsive Inventory (MOCI) using the Anxiety Disorders Interview Schedule (ADIS), a semi-structured interview created according to DSM-III guidelines. Four sections of the ADIS--generalized anxiety disorder, simple phobia, social phobia and obsessive-compulsive disorder--were administered to 11 individuals who scored in the top 2% and 11 individuals who scored in the normal range of the MOCI 6-7 months prior to the interview. High nonclinical MOCI scorers reported more frequent and severe obsessions and compulsions as well as greater disturbance by these symptoms. In addition, the high MOCI group experienced more general worry and interference from worry, and more frequent and severe physiological symptoms when they worry. However, the two groups did not differ in terms of simple and social phobia symptoms. High MOCI scorers thus did not report a broad range of anxiety symptoms or fears, but specific obsessions and compulsions. These results provide further support for the validity of the MOCI in nonclinical samples over a 6-7 month interval.