Table 1. PD patient-control series demographics.

The sample mean ± SD (minimum, maximum) is given for age and age at onset. Total sample sizes given for each series do not account for genotyping failure, which occurred in <5% of samples.

Series	PD patients	Controls
US	n=224	n=224
Age	73 ± 10 (38 – 90)	73 ± 10 (38 – 90)
Age at onset	62 ± 12 (26 – 82)	N/A
Familial PD (%)	155 (37)	N/A
Gender (Male)	115 (51%)	115 (51%)
Ireland	n=174	n=174
Age	61 ± 12 (33 – 90)	61 ± 12 (33 – 90)
Age at onset	49 ± 11 (18 – 77)	N/A
Familial PD (%)	28 (16)	N/A
Gender (Male)	68 (39%)	68 (39%)
Norway	n=391	n=958
Age	72 ± 11 (30 – 99)	73 ± 11 (43 – 106)
Age at onset	59 ± 11 (25 – 88)	N/A
Familial PD (%)	120 (23)	N/A
Gender (Male)	325 (60%)	538 (47%)
Poland	n=101	n=123
Age	75 ± 7 (56 – 86)	70 ± 11 (34 – 89)
Age at onset	64 ± 7 (38 – 76)	N/A
Familial PD (%)	13 (13)	N/A
Gender (Male)	40 (40%)	48 (39%)