A member asked:

How probable is a sibling of a parkinson's disease patient to have same diagnosis?

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3.5 times more...: A 2004 study in the annals of neurology, by dr. Haydeh payami, found that first-degree relatives (i.e., parents and siblings) of patients with idiopathic parkinson disease were 3.5 times more likely to have parkinson disease.

Answered 5/12/2016

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