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Journal of Geriatric Psychiatry and Neurology
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Validity of the Dementia Rating Scale in Assessing Cognitive Function in Parkinson's Disease

Gregory G. Brown, PhD

Alice Armstrong Rahill, PhD

Jay M. Gorell, MD

Cathleen McDonald, PhD

Sandra J. Brown, PhD

Monica Sillanpaa, PhD

Clifford Shults, MD

Two studies examined the validity of the Dementia Rating Scale (DRS) as a measure of cognitive functioning among patients with Parkinson's disease (PD). The DRS accounted for more variation in the level of cognitive functioning of PD patients than either the Mini-Mental Status Examination or a battery of tests selected to assess specific cog nitive deficits associated with PD. Further, DRS subtests displayed strong convergent and discriminant validity with a comprehensive Criterion Neuropsychology Battery. The DRS subtests appear to be valid measures of atten tion, perseveration, conceptualization, and memory among PD patients. However, the DRS-Construction subtest should be supplemented with additional visuoconstructional items to provide a thorough screen of cognitive func tioning in PD. Although about three-quarters of nondemented PD patients did not appear to have any specific cognitive deficits on the DRS, the remaining patients were impaired on the Construction or Initiation/Perseveration subtests of the DRS. In summary, the DRS is a valid mental status screening test of cognitive functioning for indi viduals with PD. (J Geriatr Psychiatry Neurol 1999; 12:180-188).

Journal of Geriatric Psychiatry and Neurology, Vol. 12, No. 4, 180-188 (1999)
DOI: 10.1177/089198879901200403
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[Abstract] [Full Text] [PDF]


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