ABSTRACT: The MMPIs provided by 69 subjects diagnosed as suffering from panic, depression, or mixed panic and depression were cluster analyzed. Four clusters emerged. Both the likelihood of belonging to any cluster and specific cluster assignment were associated with diagnosis. The MMPIs of those with pure panic or depression were more likely to be assigned to one of the four clusters than those with both panic and depression. Patients with depression were most likely to fall into a cluster characterized by elevations on scales 2 and 7, while those with panic were more likely to fall into a cluster characterized by elevations on scales 1 and 3. Those with both panic and depression produced MMPIs that were more heterogeneous, but also had more clinical scales with T scores greater than 70, an indication of greater disturbance. The findings suggest that diagnostically differentiated groups differ in psychological correlates as well as in symptom complexes.
Journal of Anxiety Disorders.