Prevalence of somatoform disorders in a large sample of patients with anxiety disorders.

The authors investigated the prevalence and characteristics of somatoform (SOM) disorders among 654 subjects with anxiety disorders who were part of the larger Harvard/Brown Anxiety Disorders Research Project. Thirty-six (5.5%) of the subjects had past or current SOM disorders. The subjects with SOM disorders were significantly more likely to have histories of posttraumatic stress disorder (22% vs. 8%, P = 0.01). The subjects with generalized anxiety disorder had significantly higher rates of SOM disorder (9.2% vs. 4.0%, P = 0.01). These results add support to the observation that SOM disorders are frequently comorbid with anxiety and depressive disorders.