. Author manuscript; available in PMC: 2018 Jan 26.

Published in final edited form as: Neurodegener Dis. 2017 Jan 26;17(2-3):110–116. doi: 10.1159/000453359

Table 5.

Composite models of ALS risk factors.

		Controls	Cases	Overall	Male
		N (%)	N (%)	OR(95%CI) ^ab	OR(95%CI) ^a
Smoking status	Never	110 (52)	131(46)	Reference	Reference
	Former	91 (43)	131(46)	1.12(0.72,1.75)	1.3(0.7,2.43)
	Current	10 (5)	25(9)	2.48(0.96,7.27)	2.72(0.83,10.82)
Primary occupation involves industrial chemicals	No	169 (94)	210(79)	Reference	Reference
Primary occupation involves industrial chemicals	Yes	11 (6)	55 (21)	4.1(1.91,9.87)	2.45(1.21,5.2)
Water-Ski	No	178 (95)	207 (81)	Reference	Reference
≥2x per month, for 1 year or more	Yes	10 (5)	47 (19)	3.71(1.8,8.47)	2.91(1.18,8.3)

Odds ratios (OR) adjusted for age^a and gender^b. Missing smoking n =21, primary occupation n=74, water-ski n=77.