TABLE 1.

Characteristics of Parkinson’s Environment and Gene Study Population^*

Characteristic	Cases (n = 355)	Controls (n = 335)
Age (y)	69.4 ± 10.3	67.6 ± 11.5
Female sex	150 (42.3%)	160 (47.8%)
White race	305 (85.9%)	287 (85.7%)
Education
< 12 y	63 (17.8%)	37 (11.0%)
12 y	98 (27.6%)	63 (18.8%)
> 12 y	194 (54.7%)	235 (70.2%)
Smoking status
Current	21 (5.9%)	33 (9.9%)
Former	148 (41.7%)	158 (47.2%)
Never	186 (52.4%)	144 (43.0%)
Longest held job duration (y)	20.3 ± 11.1	18.5 ± 11.2
Years resided in Central Valley†	23.0 (81.1%)	24.0 (79.3%)

^*Mean ± standard deviation or number (percentage).

^†1974-present/study entry.