Abstract
The General Behavior Inventory (GBI), a self-report instrument that measures mood disorders, was completed by 224 drug-dependent subjects, who also completed other psychometric tests, underwent clinical psychiatric evaluation blind to GBI results, and provided urine toxicology specimens during outpatient treatment. The GBI found unipolar and bipolar disorders in 10.7% and 15.6% of subjects, respectively. Less than optimal concordance occurred between clinical diagnoses and GBI findings. GBI unipolar patients and bipolar patients appeared globally significantly more disturbed than subjects without GBI mood disorders on the Minnesota Multiphasic Personality Inventory- 68 and the Millon Clinical Multiaxial Inventory. GBI bipolar patients tended to have greater frequency of cocaine use prior to and during treatment than the other two groups. The GBI delineates subgroups of addicts with distinctive psychopathology, who in some cases escape clinical detection. Cocaine use shows an association with GBI bipolar disorders.