Table 5.

Odds ratios of salivary gland cancer associated with some vitamin/mineral supplements.

Variable	Case	Control	Adjusted∗
			OR	95% CI	p for trend
Multiple vitamin (years taken)
Never	55	1504	Ref		0.16
<4 years	33	649	1.34	0.85–2.12
≥4 years	44	923	1.35	0.88–2.06
Vitamin A (years taken)
Never	106	2570	Ref		0.23
<4 years	12	247	1.20	0.65–2.21
≥4 years	14	259	1.38	0.78–2.46
Vitamin C (years taken)
Never	58	1491	Ref		0.70
<4 years	38	665	1.46	0.95–2.24
≥4 years	36	920	1.05	0.68–1.61
Vitamin E (years taken)
Never	78	1904	Ref		0.41
<4 years	26	530	1.23	0.78–1.94
≥4 years	28	642	1.16	0.74–1.82
Beta carotene (years taken)
Never	112	2653	Ref		1.00
<4 years	14	227	1.53	0.86–2.73
≥4 years	6	196	0.74	0.32–1.70
B-complex vitamins (years taken)
Never	94	2309	Ref		0.20
<4 years	17	372	1.14	0.66–1.95
≥4 years	21	395	1.38	0.84–2.27
Calcium (years taken)
Never	89	2066	Ref		0.54
<4 years	20	466	1.09	0.65–1.82
4 years	23	542	1.16	0.71–1.90
Iron (years taken)
Never	101	2356	Ref		0.81
<4 years	19	400	1.10	0.65–1.88
≥4 years	12	320	0.87	0.46–1.63
Zinc (years taken)
Never	113	2690	Ref		0.93
<4 years	14	195	1.72	0.96–3.07
≥4 years	5	191	0.64	0.26–1.58

^∗Adjusted for age, sex, and province of residence.