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. Author manuscript; available in PMC: 2015 Apr 1.

Published in final edited form as: Occup Environ Med. 2014 Jan 16;71(4):275–281. doi: 10.1136/oemed-2013-101394

Table 1.

Demographic Characteristics of the Study Population

	Case (n=357)		Control (n=752)
	n	%	n	%
Age (Mean and Range)^*	68.3 (34-88)		66.9 (35-99)
≤ 60	75	21.0	221	29.4
> 60	282	79.0	531	70.6
Gender
Female	152	42.6	401	53.3
Male	205	57.4	351	46.7
1^st Deg. Relative with PD
No	305	85.4	689	91.6
Yes	52	14.6	63	8.4
Race
White	287	80.4	526	70.0
Non-White	70	19.6	226	30.0
Education
<12 years	66	18.5	111	14.8
12 years	96	26.9	156	20.7
>12 years	195	54.6	485	64.5
Smoker Status
Never smoker	187	52.4	362	48.1
Former smoker	150	42.0	304	40.4
Current smoker	20	5.6	86	11.5

^*

Age represents age at PD onset for cases and age at interview for controls