© 2013 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd. This is the protocol for a review and there is no abstract. The objectives are as follows: To determine the diagnostic accuracy of the MMSE at various thresholds for detecting individuals with MCI at baseline who would clinically convert to Alzheimer and CloseCurlyQuote;s disease dementia or other forms of dementia at follow-up To assess the heterogeneity of test accuracy by population (e.g. memory clinics, community settings) and MMSE thresholds, amongst other factors.