Table 5.
Odds ratios (OR) and 95% confidence intervals (CI) for cereal and grain products and head and neck cancer risk
| Quartiles Cereals and grains |
1st quartile | 2nd quartile | 3rd quartile | 4th quartile | P for trend |
No. of studies |
P for heterogeneity1 |
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ca/co | Ca/co | OR | 95% CI | Ca/co | OR | 95% CI | Ca/co | OR | 95% CI | ||||
| Overall | 2837/5074 | 2212/3972 | 0.82 | (0.70–0.96) | 2244/3972 | 0.95 | (0.78–1.16) | 2244/4081 | 0.98 | (0.80–1.22) | 0.81 | 16 | <0.01 |
| Breakfast cereals | 1000/1285 | 842/1355 | 1.00 | (0.84–1.18) | 738/1293 | 0.88 | (0.67–1.15) | 646/1251 | 0.93 | (0.71–1.23) | 0.25 | 9 | <0.01 |
| Bread | 2525/4094 | 2261/3770 | 0.92 | (0.81–1.05) | 2284/3901 | 1.00 | (0.81–1.22) | 2221/3845 | 0.98 | (0.69–1.41) | 0.84 | 15 | <0.01 |
| Corn bread | 2535/3833 | 1886/2339 | 1.12 | (1.00–1.27) | 1073/1467 | 1.06 | (0.86–1.30) | 1218/1305 | 1.27 | (1.03–1.55) | 0.50 | 9 | <0.01 |
| Pasta and rice | 2079/3748 | 2074/3820 | 0.97 | (0.78–1.21) | 3267/5137 | 1.01 | (0.82–1.25) | 1976/3020 | 1.16 | (0.95–1.42) | 0.25 | 15 | <0.01 |
| Frequency per week | <1 time/week | 1–3 times/week | 3–7 times/week | >=7 times/week | |||||||||
| Corn bread | 4763/6662 | 1336/1605 | 1.07 | (0.88–1.30) | 440/471 | 1.13 | (0.93–1.38) | 346/373 | 1.24 | (0.97–1.58) | 0.27 | 9 | <0.01 |
| Rice | 948/1241 | 484/966 | 0.83 | (0.67–1.03) | 279/616 | 0.85 | (0.64–1.11) | 818/3336 | 1.10 | (0.66–1.83) | 0.31 | 8 | 0.05 |
| Corn | 1639/2128 | 788/990 | 0.95 | (0.79–1.15) | 277/337 | 0.99 | (0.76–1.30) | 36/31 | 1.59 | (0.43–5.85) | 0.01 | 7 | 0.03 |
1
An overall p for heterogeneity across studies