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Demographic data
| Group | PD patients (n = 629) | Controls (n = 865) | P |
|---|---|---|---|
| Age, years, mean (SD) | 66.65 (10.53) | 65.22 (10.79) | .071 |
| Age range, years | 22–95 | 19–92 | — |
| AAO, years, mean (SD) | 57.68 (14.03) | NA | — |
| AAO range, years | 14–85 | NA | — |
| Men n (%) | 295 (46.9) | 392 (45.3) | .924 |
Abbreviations: AAO, age at onset; NA, not available; PD, Parkinson's disease; SD, standard deviation.
