One of the most comprehensive Alzheimer’s disease and related dementia staging tools is FAST—the Functional Assessment Staging Test—which was developed by Barry Reisberg, MD, in 1984. This staging tool provides a clear understanding of the progression of Alzheimer’s disease from start to finish and categorizes stages from 1 to 7f. Each stage of the FAST has a well-defined duration and set of cognitive and behavioral abilities affected. Each stage of the FAST also indicates the individual’s mental or developmental age so that caregivers know what is appropriate stimulation.

The FAST stages are also correlated with one of the most commonly used dementia tests, the Mini-Mental State Examination.