The lifetime risk at birth of developing Parkinson’s disease is around 2% for men and 1.3% for women.
Elbaz, Alexis, James H. Bower, Demetrius M. Maraganore, Shannon K. McDonnell, Brett J. Peterson, J. Eric Ahlskog, Daniel J. Schaid, and Walter A. Rocca. Risk Tables for Parkinsonism and Parkinson’s Disease. J Clin Epidemiol. 2002; 55(1): 25-31. http://www.jclinepi.com/article/S0895-4356(01)00425-5/abstract