Identifying chronic affective disorders in outpatients: Validation of the General Behavior Inventory.

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Abstract
The validity of the General Behavior Inventory (GBI) in screening outpatients for chronic unipolar and bipolar affective conditions was evaluated. The GBI was administered to 492 consecutive patients at a university clinic and a community mental health center. Using a stratified random sampling plan, 167 patients were selected and administered blind structured diagnostic interviews. In addition, unipolar depressives were followed up 6 months after the initial evaluation. Overall, the GBI exhibited fair-to-good positive predictive power and good-to-excellent negative predictive power. In addition, GBI scores in the case range were consistently associated with poor outcome at the 6-month follow-up. These findings suggest that the GBI may provide an economical means of screening for chronic unipolar and bipolar affective conditions in outpatient settings.

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