Hello everyone again, thanks for the info--still wondering how the statistics are compiled on prevalence of PD in the US--is it thru #'s of prescriptions for PD drugs? would not seem accurate, esp now with one of the dopamine agonists being used for restless leg syndrome. the Ali foundation in Arizona (i think) has begun a registry, though it is relatively new. I would think since the passage of the HIPPA laws that physicians are banned from reporting patients with PD if they are not required to do so. Just thinking while typing--I am guillty of doing that too often...continue to be curious about the statistics and how they are determined. madelyn