Relative risks (RRs) and 95% confidence intervals (CIs) for colorectal cancer associated with maternal characteristics among 35 697 Norwegian men and women born between 1920 and 1958
| Variable | Women | Men | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No of cases | No of women | RR* | RR† (95% CI) | p Trend‡ | No of cases | No of men | RR* | RR† (95% CI) | p Trend‡ | |
| *Adjusted for year of birth (1920–1924, 1925–1929, …, 1955–1958). | ||||||||||
| †All variables in the table are mutually adjusted, in addition to adjustment for year of birth (1920–1924, 1925–1929, …, 1955–1958), length of gestation (preterm (<37 weeks) or term (⩾37 weeks)), gestational hypertension and/or pre-eclampsia (no, yes), maternal marital status (married, unmarried, widow, divorced), and maternal socioeconomic status (manual labour versus other occupations). | ||||||||||
| ‡Two sided p values for trend in Cox regression. | ||||||||||
| Maternal age (y)† | ||||||||||
| <25 | 35 | 4711 | 1.0 | 1.0 | 61 | 5789 | 1.0 | 1.0 | ||
| 25–29 | 29 | 4805 | 0.9 | 0.9 (0.5–1.5) | 55 | 6020 | 0.9 | 0.9 (0.6–1.3) | ||
| 30–34 | 15 | 3767 | 0.6 | 0.6 (0.3–1.1) | 17 | 4525 | 0.4 | 0.4 (0.2–0.7) | ||
| ⩾35 | 17 | 2694 | 1.0 | 1.0 (0.5–2.1) | 0.85 | 17 | 3320 | 0.6 | 0.6 (0.3–1.2) | 0.009 |
| Maternal birth order† | ||||||||||
| 1st | 46 | 7208 | 1.0 | 1.0 | 79 | 8758 | 1.0 | 1.0 | ||
| 2nd | 28 | 4962 | 1.1 | 1.2 (0.7–2.0) | 43 | 6077 | 1.0 | 1.1 (0.8–1.7) | ||
| 3rd | 11 | 2278 | 0.9 | 1.1 (0.5–2.2) | 17 | 2806 | 0.9 | 1.1 (0.6–1.9) | ||
| ⩾4th | 12 | 1552 | 1.0 | 1.1 (0.5–2.4) | 0.84 | 11 | 2023 | 0.5 | 0.6 (0.3–1.3) | 0.44 |
| Maternal height (cm) | ||||||||||
| <1.59 | 24 | 3477 | 1.0 | 1.0 | 47 | 4444 | 1.0 | 1.0 | ||
| 1.59–1.62 | 20 | 3869 | 1.1 | 1.1 (0.6–2.1) | 31 | 4777 | 0.8 | 0.8 (0.5–1.3) | ||
| 1.63–1.66 | 20 | 3795 | 1.4 | 1.4 (0.8–2.6) | 23 | 4454 | 0.8 | 0.8 (0.5–1.4) | ||
| ⩾1.67 | 11 | 3318 | 1.1 | 1.1 (0.5–2.2) | 0.96 | 8 | 3978 | 0.9 | 0.9 (0.5–1.5) | 0.37 |