Distinguishing anxiety and depression: Reexamination of the reconstructed Hamilton scales.

Abstract

The discriminant validities of the original and the reconstructed Hamilton anxiety and depression scales (Riskind et al., 1987) were compared in patients who had principal DSM-III-R anxiety disorders with or without one or more comorbid mood disorders. The reconstructed anxiety and depression scales that had better discriminant validity (scale intercorrelation=.61) than the original scales did (r=.78). However, the reconstructed scales shared considerable variance (about 37%), which was significantly higher than the shared variance (about 2%) reported by Risking et al. Discriminant analyses showed that the reconstructed scales did not distinguish anxiety patients with comorbid mood disorders from those without comorbid mood disorders better than the original scales did. However, the reconstructed scales eliminate item overlap, an obvious source of artifactual correlations between scores on the Hamilton anxiety and depression scales

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