Silver Book Fact
Psychiatric symptoms such as depression and anxiety occur in 1/3 to 2/3 of Parkinson’s disease patients.
Adler C. Nonmotor Complications in Parkinson’s Disease. Mov Disorders. 2005; 20(S11): 23-9. https://onlinelibrary.wiley.com/doi/abs/10.1002/mds.20460