A group of patients whose conditions were diagnosed as primary affective disorder was followed up prospectively after a five-year interval. The patients were reinterviewed blindly, and 86% were given the same diagnosis at follow-up, evidence of the diagnostic validity of the criteria used for primary affective disorder. This report compares the efficiency of criteria developed in our department more recently (Feighner et al) with criteria used in initial evaluation of our patients' conditions (Cassidy et al). Within the limits of this study, there is evidence that the Feighner criteria are more inclusive in selecting patients with primary affective disorder with no loss of diagnostic validity.
Murphy GE, Woodruff RA, Herjanic M. Primary Affective Disorder: Selection Efficiency of Two Sets of Diagnostic Criteria. Arch Gen Psychiatry. 1974;31(2):181–184. doi:10.1001/archpsyc.1974.01760140037005
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