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From the Departments of Neurology (Drs. Montgomery and Baker) and Neurosciences (Dr. Montgomery), Lerner Research Institute, Cleveland Clinic Foundation, Cleveland, OH; and the Department of Neurology (Drs. Lyons and Koller), The University of Kansas Medical Center, Kansas City, KS.
Address correspondence and reprint requests to Dr. Erwin B. Montgomery, Jr., Department of Neurology, Desk S90, Cleveland Clinic Foundation, 9500 Euclid Ave., Cleveland, OH 44195.
OBJECTIVE: To determine whether a sensitive and specific battery of tests (PD Battery) could identify a subset of asymptomatic first-degree relatives (FDRs) of PD patients who were significantly more impaired than age-matched normal control (NC) subjects. The PD Battery incorporates tests of motor function, olfaction, and mood. In previous studies, it has shown high specificity and sensitivity in distinguishing mildly affected PD patients from NC subjects.
METHODS: The PD Battery and regression analysis-derived scoring equations were applied to asymptomatic FDRs.
RESULTS: Eighty FDRs and 100 NC subjects were tested. Of the FDRs, 22.5% scored in the abnormal range, and 9% of NC subjects had abnormal scores. This difference was statistically significant. Further analysis demonstrated that FDRs with abnormal scores on the PD Battery differed on all three components of the test battery from FDRs who had normal scores. Among the sons and daughters whose scores were abnormal, there was a much higher prevalence of the affected parent being the father.
CONCLUSIONS: The proportion of FDRs who demonstrated abnormal performance on the PD Battery was greater than that of NC subjects. Thus, the PD Battery may detect the asymptomatic carrier state or risk for PD. Sons and daughters whose scores were in the abnormal range were more likely to have fathers with PD.
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