The Sydney multicenter study of Parkinson's disease: The inevitability of dementia at 20 years

Abstract After 20 years follow‐up of newly diagnosed patients with Parkinson's disease (PD), 100 of 136 (74%) have died. The mortality rate fell in the first 3 years of treatment, then rose compared to the general population, the standardized mortality ratio from 15 to 20 years reaching 3.1. Drug in... View More