Table 4.
Multivariate adjusted rate ratios for colorectal adenomas according to age and two major dietary patterns
| Quintile | Cases | Person-years | Adjusted IRR (95% CI)1 | |
|---|---|---|---|---|
| Age < 50 years | ||||
| Western | 1 | 24 | 11,872 | 1.00 |
| 2 | 36 | 13,552 | 1.21(0.71-2.03) | |
| 3 | 36 | 14,335 | 1.16(0.68-1.97) | |
| 4 | 42 | 15,515 | 1.22(0.73-2.05) | |
| 5 | 44 | 16,300 | 1.21(0.71-2.03) | |
| P, trend | 0.56 | |||
| |
||||
| Prudent | 1 | 46 | 18,332 | 1.00 |
| 2 | 46 | 16,643 | 1.10(0.72-1.66) | |
| 3 | 39 | 14,244 | 1.11(0.71-1.73) | |
| 4 | 28 | 12,486 | 0.87(0.53-1.42) | |
| 5 | 23 | 9,868 | 0.93(0.54-1.58) | |
| P, trend | 0.55 | |||
| | ||||
| Age ≥ 50 years | ||||
| Western | 1 | 90 | 19,266 | 1.00 |
| 2 | 84 | 17,557 | 1.07(0.79-1.45) | |
| 3 | 94 | 16,737 | 1.29(0.96-1.74) | |
| 4 | 77 | 15,532 | 1.17(0.85-1.60) | |
| 5 | 93 | 14,748 | 1.53(1.12-2.08) | |
| P, trend | < 0.01 | |||
| |
||||
| Prudent | 1 | 80 | 12,754 | 1.00 |
| 2 | 80 | 14,459 | 0.85(0.61-1.16) | |
| 3 | 83 | 16,852 | 0.72(0.52-0.99) | |
| 4 | 103 | 18,559 | 0.77(0.56-1.05) | |
| 5 | 92 | 21,216 | 0.58(0.41-0.80) | |
| P, trend | <0.01 | |||
1
Adjusted for BMI, education, family history of colorectal cancer, vigorous physical activity, total energy intake, menopausal status, alcohol consumption, aspirin use, smoking status and female hormone use