highly significantp < 0.0001
Characteristics of Participants Parkinson's disease patients were in average 6.4 years older than controls and had a highly significant worse quality of life (25.82 [16.35] vs. 5.77 [9.41]; p < 0.0001; d values of all PDQ-8 subitems ranged from 0.81 to 1.33) [ 34 ].