Table 4.
Odds ratios (OR) and 95% confidence intervals (CI) for meat and eggs and head and neck cancer risk
| Quartiles Animal Products |
1st quartile | 2nd quartile | 3rd quartile | 4th quartile | P for trend |
No. of studies |
P for heterogeneity4 |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ca/co | Ca/co | OR | 95% CI | Ca/co | OR | 95% CI | Ca/co | OR | 95% CI | ||||
| Overall meats | 3084/4883 | 3003/5224 | 0.96 | (0.87–1.05) | 3095/5311 | 0.99 | (0.85–1.15) | 3385/4890 | 1.05 | (0.87–1.27) | 0.36 | 21 | <0.01 |
| Red meat1 | 1926/3852 | 2283/4456 | 1.12 | (0.98–1.29) | 2382/3894 | 1.16 | (1.00–1.34) | 2858/3081 | 1.40 | (1.13–1.74) | 0.13 | 15 | <0.01 |
| Beef | 1750/2733 | 2028/2776 | 1.13 | (0.97–1.32) | 1990/2863 | 1.14 | (0.99–1.32) | 2951/3106 | 1.37 | (1.16–1.61) | <0.01 | 12 | <0.01 |
| Pork | 1795/3185 | 2343/3204 | 1.14 | (0.94–1.39) | 2065/2403 | 1.42 | (1.13–1.78) | 2003/1789 | 1.48 | (1.19–1.83) | 0.03 | 11 | <0.01 |
| White meat2 | 4442/5158 | 3896/5364 | 0.81 | (0.70–0.95) | 2816/4809 | 0.75 | (0.64–0.86) | 1909/4843 | 0.68 | (0.55–0.84) | <0.01 | 20 | <0.01 |
| Poultry | 2647/3941 | 3471/5423 | 0.94 | (0.82–1.07) | 2277/3868 | 0.91 | (0.76–1.09) | 1669/2836 | 0.82 | (0.64–1.05) | 0.03 | 16 | <0.01 |
| Seafood3 | 3054/4135 | 3720/5768 | 0.84 | (0.76–0.94) | 2936/4598 | 0.86 | (0.77–0.97) | 2294/3883 | 0.83 | (0.74–0.94) | 0.02 | 19 | <0.01 |
| Processed meat | 2758/5038 | 2910/4856 | 1.21 | (1.05–1.38) | 2999/5185 | 1.13 | (0.97–1.30) | 3763/5057 | 1.37 | (1.14–1.65) | <0.01 | 21 | <0.01 |
| Egg | 2145/4172 | 2869/5093 | 1.04 | (0.89–1.21) | 2750/5360 | 1.11 | (0.99–1.25) | 3172/4068 | 1.44 | (1.12–1.86) | 0.11 | 20 | <0.01 |
| Milk and dairy products | 3148/4540 | 2692/4584 | 0.97 | (0.83–1.13) | 2378/4733 | 0.96 | (0.79–1.18) | 2618/4454 | 1.01 | (0.77–1.34) | 0.96 | 19 | <0.01 |
| Frequency per week | <1 time/week | 1–3 times/week | 3–7 times/week | >=7 times/week | |||||||||
| Beef | 860/870 | 1803/1861 | 1.15 | (0.92–1.45) | 1514/1622 | 1.19 | (0.91–1.56) | 960/658 | 1.55 | (1.07–2.23) | 0.34 | 4 | 0.91 |
| Pork | 4970/7611 | 2645/2542 | 1.28 | (0.99–1.65) | 485/369 | 1.37 | (1.13–1.66) | 106/59 | 1.81 | (1.15–2.84) | 0.16 | 11 | <0.01 |
| Boiled chicken | 1491/2910 | 639/1413 | 1.00 | (0.71–1.42) | 145/438 | 0.93 | (0.65–1.34) | 19/67 | 0.78 | (0.29–2.09) | 0.77 | 5 | 0.03 |
| Fried chicken | 1184/2413 | 1229/2351 | 1.14 | (0.83–1.57) | 176/411 | 1.00 | (0.50–2.03) | 17/39 | 0.82 | (0.16–4.21) | 0.29 | 6 | <0.01 |
| Liver | 4640/10968 | 866/1509 | 1.35 | (1.02–1.79) | 73/95 | 1.15 | (0.73–1.81) | 14/15 | 1.99 | (0.59–6.74) | <0.01 | 12 | <0.01 |
| Egg | 2443/4534 | 3707/7303 | 1.07 | (0.93–1.23) | 3482/5278 | 1.41 | (1.12–1.77) | 1304/1578 | 1.48 | (1.20–1.82) | 0.03 | 20 | <0.01 |
1
Included beef and pork
2
Included poultry, fish, and shellfish
3
Included fish and shellfish
4
An overall p for heterogeneity across studies