A comparison of two mental status examinations in an inpatient psychiatric sample

This study compares the psychometric properties and clinical use of the Mini-Mental Status Exam (MMSE) and the Modified MMSE (3MS) in patients admitted to an acute medical-psychiatric inpatient unit. Internal consistencies were .56 for the estimated MMSE and .72 for the 3MS. Regression analyses revealed that the 3MS was a significant predictor of both length of hospital stay (LOS) and the need for additional services postdischarge. Regressions were also used to evaluate the contribution of the four new items contained in the 3MS: Word Generation, Similarities, Second Recall, and Date and Place of Birth. The 3MS was a significant predictor of LOS and the need for discharge services, whereas the MMSE did not contribute to any regression model. Word Generation was found to be a significant predictor of patients' needing posthospital services. Results support prior findings of the 3MS's superiority over the (estimated) MMSE and help to demonstrate the continued importance of cognitive screening in psychiatric samples.