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Mattis Dementia Rating Scale (MDRS)

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Supplemental: Parkinson's Disease (PD)
Short Description of Instrument
The Mattis Dementia Rating Scale (MDRS) was developed as a screen for cognitive impairment in the general population. It differentiates general population from mild cognitive impairment and dementia in Alzheimer disease and in Parkinson's disease. It is a generic instrument that is administered by a trained examiner to the patient.
There are 144 items and 5 subscales: Attention (8 items); Initiation-Perseveration (11 items); Construction (6 items); Conceptualization (6 items); and Memory (5 items).
Higher scores are better. Performance is largely influenced by both age and educational level.
Mattis S. Dementia rating scale: professional manual. Florida: Odessa; 1988.
Schmidt R, Freidl W, Fazekas F, et al. The Mattis Dementia Rating Scale: normative data from 1,001 healthy volunteers. Neurology 1994;44:964-966.


Document last updated June 2018