Endorsement frequencies and factor structure of DSM‐III‐R and DSM‐IV Generalized Anxiety Disorder symptoms in women: implications for future research classification clinical practice and comorbidity

摘要

We investigated dimensions of liability to Generalized Anxiety Disorder (GAD) and whether evidence exists for distinct pathological versus normal clusters in the population. Structured interviews were administered to a general population sample of 2,163 female twins in a cross‐sectional design. Endorsement rates were estimated using full information maximum likelihood factor analyses of the DSM‐III‐R and DSM‐IV GAD symptoms, which provides appropriate treatment of the stem‐probe structure of the clinical interview.