Health-related-quality-of-life (HRQOL) is severely affected in Parkinson’s disease. In a study of veterans, HRQOL was more impaired in Parkinson’s disease than in those with any other condition.
Gage H, Hendricks A, Zhang S, Kazis L. The Relative Health Related Quality of Life of Veterans with Parkinsons Disease. J Neurol Neurosurg Psychiatry. 2003; 74(2): 163-9. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1738285/?tool=pubmed