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Am J Geriatr Psychiatry 4:247-251, August 1996
© 1996 American Association for Geriatric Psychiatry
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BRIEF REPORT

A Scale to Measure Impairment in Severe Dementia and Similar Conditions

Peter V. Rabins, M.D., M.P.H., and Cynthia D. Steele, . R.N., M.P.H.

From Johns Hopkins Hospital.

The authors describe an 11-item, 22-point scale that measures cognitive capacity in severely cognitively impaired individuals. The Severe Impairment Rating Scale (SIRS) has acceptable interrater reliability (r = 0.992; P < 0.001), test–retest reliability (r = 0.97; P < 0.0001), and internal consistency (Chronbach's alpha = 0.76). Validity is supported by correlations with the Glasgow Coma Scale (r = 0.866; P < 0.001) and Mini-Mental State Examination (r = 0.770; P < 0.001).






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