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From the Departments of Neurology (Drs. E.K. Tan, Shen, Chandran, Pavanni, Wong, Puvan, and Lo, and A. Chai and C. Tan), Clinical Research (Dr. Zhao), and Health Screening (Drs. Teoh and Yih), Singapore General Hospital; National Neuroscience Institute (Drs. E.K. Tan, Pavanni, Wong, Puvan, and Lo); SingHealth Research (Dr. E.K. Tan); and Defence Medical Research Institute (Dr. Yap), Singapore.
Address correspondence and reprint requests to Dr. Eng-King Tan, Department of Neurology, Singapore General Hospital, Outram Road, Singapore 169608; e-mail: gnrtek{at}sgh.com.sg
The authors examined four- and six-loci haplotype constructs (from five single nucleotide polymorphisms and three microsatellite regions) of the alpha-synuclein gene in patients with Parkinsons disease (PD) and controls in an ethnic Chinese population. Logistic regression analysis demonstrated an association of NACP-Rep1 (p = 0.002) and L478 (p < 0.0001) with risk of PD after correction for the effects of age, sex, and the other polymorphic loci. Specific four-loci and six-loci haplotypes were significantly associated with an increased or decreased risk of PD.
Received June 17, 2003. Accepted in final form September 11, 2003.
Additional material related to this article can be found on the Neurology Web site. Go to www.neurology.org and scroll down the Table of Contents for the January 13 issue to find the title link for this article.
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