Table 4.

Relative risk (RR)^* and 95% confidence intervals (CI) of ALS according to both median baseline serum α-tocopherol^† and α-tocopherol supplementation

	Serum α-tocopherol
	Low (< 11.6mg/l)		High (≥11.6mg/l)
α-Tocopherol Supplementation	No	Yes	No	Yes
No. cases	18	13	8	11
RR	1.0 (ref)	0.72	0.41	0.56
95% CI		0.36 to 1.48	0.18 to 0.93	0.26 to 1.18
P-value		0.37	0.03	0.13

^*Adjusted for age.

^† Adjusted for cholesterol.