Research Article
A Case-Control Study of Risk Factors for Salivary Gland Cancer in Canada
Table 5
Odds ratios of salivary gland cancer associated with some vitamin/mineral supplements.
| Variable | Case | Control | | 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 | |
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for age, sex, and province of residence.
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