The validation of the GHQ-28 and the use of the MMSE in neurological in-patients.

The routine use of screening instruments for psychiatric and cognitive impairment in hospital in-patients has been recommended in the United States. The validity of the scaled version of the General Health Questionnaire (GHQ-28) and the clinical utility of the Mini-Mental State Examination (MMSE) were therefore evaluated in a consecutive series of neurological in-patients (N = 102). Using Receiver Operating Characteristic (ROC) analysis, the discriminating power of the GHQ was very good, and best when using a threshold score of 11/12. The patient sample turned out not to contain any with generalised cortical damage, which casts some doubt on whether the MMSE should be used routinely in all neurological in-patients units in the UK.