Table 4. Quartiles of dietary score and risk of oral cancer, stratified by tobacco smoking and alcohol drinking status.
| Variables | Quartiles of dietary risk score |
P for trend |
P for interaction |
ORmultiplicative (95% CI) |
|||
|---|---|---|---|---|---|---|---|
| Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 | ||||
| Smoker | < 0.001 | 1.67(1.54–1.82)b | |||||
| Cases/ Controls | 28/166 | 55/187 | 100/222 | 265/270 | |||
| OR (95%CI)a | 1.00 | 1.81 (1.07–3.06) | 2.96 (1.81–4.85) | 7.32 (4.59–11.68) | < 0.001 | ||
| Non-smoker | |||||||
| Cases/ Controls | 62/474 | 96/484 | 115/467 | 209/397 | |||
| OR (95%CI)a | 1.00 | 1.48 (1.03–2.12) | 1.88 (1.32–2.68) | 4.16 (2.97–5.83) | < 0.001 | ||
| Alcohol drinker | < 0.001 | 1.49 (1.38–1.62)c | |||||
| Cases/ Controls | 19/98 | 44/142 | 76/139 | 188/181 | |||
| OR (95%CI)a | 1.00 | 1.90 (1.02–3.54) | 3.23 (1.78–5.86) | 6.93 3.92–12.26) | < 0.001 | ||
| Non-alcohol drinker | |||||||
| Cases/ Controls | 71/542 | 107/529 | 139/550 | 286/486 | |||
| OR (95%CI)a | 1.00 | 1.50 (1.07–2.09) | 2.01 (1.46–2.78) | 5.08 (3.75–6.89) | < 0.001 | ||
aadjusted for age (y), gender, education, residence, BMI, family history of cancer, tobacco smoking, alcohol consumption, denture wearing, recurrent oral ulceration.
badjusted for age (y), gender, education, residence, BMI, family history of cancer, alcohol consumption, denture wearing, recurrent oral ulceration.
cadjusted for age (y), gender, education, residence, BMI, family history of cancer, tobacco smoking, denture wearing, recurrent oral ulceration.