Table 1 Description of cancer cases and controls and their potential as risk factors for colon cancer.
From: Colon cancer risk and different HRT formulations: a case-control study
No. cases1 | No. controls1 | Adj. OR (95% CI) | ||
|---|---|---|---|---|
Age (continuous) | per year | 354 | 1422 | 1.64 (1.52–1.77) |
Age | < 50 years | 47 | 249 | referent |
50+ years | 307 | 1173 | 4.38 (1.41–13.62) | |
Education | Lower education | 279 | 1014 | referent |
University level | 64 | 394 | 0.64 (0.45–0.91) | |
Age at menarche (cont) | per year | 344 | 1396 | 1.04 (0.95–1.14) |
Age at menarche | < 13 years | 148 | 683 | referent |
13+ years | 196 | 713 | 1.16 (0.87–1.55) | |
Pregnancy | Never pregnant | 32 | 104 | referent |
Ever pregnant | 318 | 1300 | 0.85 (0.50–1.45) | |
Number of children (cont) | per child | 318 | 1286 | 0.75 (0.64–0.89) |
Age at first live birth (cont) | per birth | 316 | 1274 | 1.00 (0.96–1.04) |
Age at first live birth | < = 22 years | 140 | 624 | referent |
> 22 years | 176 | 650 | 1.15 (0.84–1.57) | |
Breast-feeding | never | 193 | 525 | referent |
ever | 157 | 878 | 0.31 (0.23–0.43) | |
OC use | never | 144 | 484 | referent |
ever | 210 | 933 | 0.64 (0.46–0.89) | |
Family history of colon cancer | No | 192 | 656 | referent |
Yes | 68 | 54 | 3.40 (2.08–5.56) | |
BMI (cont) | 348 | 1406 | 0.96 (0.93–0.99) | |
Body mass index | < 25 | 135 | 505 | referent |
25+ | 213 | 901 | 0.91 (0.68–1.23) |