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Journal of Geriatric Psychiatry and Neurology
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Assessing Cognition in Parkinson Disease: Use of the Cognitive Linguistic Quick Test

Sotirios A. Parashos, MD, PhD

Struthers Parkinson's Center, Golden Valley, Minnesota, and the Minneapolis Clinic of Neurology, Minneapolis, Minnesota, paras001{at}umn.edu

Marjorie L. Johnson, MA

Struthers Parkinson's Center, Golden Valley, Minnesota, and the Minneapolis Clinic of Neurology, Minneapolis, Minnesota

Cordelia Erickson-Davis, BA

Struthers Parkinson's Center, Golden Valley, Minnesota, and the Minneapolis Clinic of Neurology, Minneapolis, Minnesota

Catherine L. Wielinski, MPH

Struthers Parkinson's Center, Golden Valley, Minnesota, and the Minneapolis Clinic of Neurology, Minneapolis, Minnesota

Objective: To evaluate the Cognitive Linguistic Quick Test (CLQT) as a cognitive screening tool in Parkinson disease (PD). Methods: A total of 93 patients with PD were evaluated with the Mini-Mental State Examination (MMSE) and the CLQT. The CLQT provides separate ratings for 5 cognitive domains. Descriptive statistics, correlations between the tests, and diagnostic value for dementia were analyzed. Results: Cognitive Linguistic Quick Test correlated well with MMSE. Diagnostic values for dementia were similar for the 2 instruments. Unlike the MMSE, the CLQT also provided domain-specific information on cognitive deficits. Cognitive domains were differentially affected between and within the demented and nondemented patient groups with PD: memory was the weakest domain in the demented group and attention in the nondemented. Conclusions: The CLQT is a valuable instrument in assessing cognitive dysfunction in PD. The CLQT is superior to the MMSE as it also provides cognitive domain-specific information.

Key Words: Parkinson disease • cognitive impairment • cognitive screening • dementia • MMSE

This version was published on December 1, 2009

Journal of Geriatric Psychiatry and Neurology, Vol. 22, No. 4, 228-234 (2009)
DOI: 10.1177/0891988709342721
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