Differential diagnosis of PTSD, schizophrenia, and depression with the MMPI-2

This study used 102 male, veteran, psychiatric inpatients to describe patterns of MMPI-2 clinical and content scales that most accurately discriminate among patients diagnosed with PTSD, schizophrenia, and depression. Single scale accuracy classification using scales PK and PS was unacceptably low. Optimally weighted scales, including PK, Sc, BIZ, and ANX, correctly classified 70% of the patients. Suggestions for facilitating the use of formal decision rules are offered.