Table 1 Distribution by sex and mean ages of onset or enrollment for the idiopathic Parkinson's disease (PD), familial PD, unaffected PD relative and controls samples
| Â | N | Men (%) | Women (%) | Mean age at onset or *enrollment |
|---|---|---|---|---|
Randomly ascertained PD | 126 | 81 (64%) | 45 (36%) | 56.3 |
Familial PD | 903 | 501 (55%) | 402 (45%) | 60.4 |
Unaffected relatives | 59 | 26 (44%) | 33 (56%) | *58.7 |
Controls | 197 | 95 (48%) | 102 (52%) | *65.9 |