TABLE 1.
Baseline characteristics of the colorectal cancer cases and the study population by sex1
| Men |
Women |
|||
|---|---|---|---|---|
| Cases (n = 1138) |
Population (n = 85 903) |
Cases (n = 972) |
Population (n = 105 108) |
|
| Age of cohort at entry (y) | 64.7 ± 7.6 | 60.2 ± 8.9 | 64.1 ± 7.9 | 59.7 ± 8.8 |
| Race-ethnicity (%) | ||||
| African American | 15.6 ± 1.1 | 13.9 ± 0.1 | 27.7 ± 1.4 | 19.8 ± 0.1 |
| Japanese American | 38.0 ± 1.4 | 29.5 ± 0.2 | 30.8 ± 1.5 | 27.2 ± 0.1 |
| Latino | 18.9 ± 1.2 | 24.4 ± 0.2 | 15.4 ± 1.2 | 21.5 ± 0.1 |
| Native Hawaiian | 7.1 ± 0.8 | 7.0 ± 0.1 | 6.2 ± 0.8 | 7.4 ± 0.1 |
| White | 20.4 ± 1.2 | 25.3 ± 0.2 | 20.0 ± 1.3 | 24.1 ± 0.1 |
| Family history of colorectal cancer (%) | 11.2 ± 0.9 | 7.2 ± 0.1 | 13.4 ± 1.1 | 8.5 ± 0.1 |
| History of colorectal polyps (%) | 5.9 ± 0.7 | 6.8 ± 0.1 | 5.3 ± 0.7 | 4.3 ± 0.1 |
| Cigarette smoking status | ||||
| Nonsmoker | 23.4 ± 1.3 | 30.0 ± 0.2 | 52.7 ± 1.6 | 55.7 ± 0.1 |
| Past smoker | 58.2 ± 1.5 | 51.9 ± 0.2 | 33.9 ± 1.5 | 30.0 ± 0.1 |
| Current smoker | 18.4 ± 1.2 | 18.2 ± 0.1 | 13.4 ± 1.2 | 14.4 ± 0.1 |
| Pack-years of cigarette smoking2 | 23.5 ± 17.9 | 20.6 ± 16.6 | 16.7 ± 14.8 | 15.4 ± 14.4 |
| BMI (kg/m2) | 26.0 ± 4.2 | 26.1 ± 4.2 | 26.5 ± 6.1 | 26.0 ± 5.7 |
| Vigorous physical activity (h/wk) | 3.0 ± 5.9 | 4.1 ± 7.1 | 0.9 ± 2.3 | 1.5 ± 3.8 |
| Aspirin use (%) | 40.0 ± 1.4 | 41.3 ± 0.2 | 38.9 ± 1.6 | 37.6 ± 0.2 |
| Multivitamin use (%) | 42.0 ± 1.5 | 47.7 ± 0.2 | 48.4 ± 1.6 | 54.0 ± 0.2 |
| Replacement hormone use (%) | 42.6 ± 1.6 | 46.6 ± 0.2 | ||
| Energy intakes (kcal/d) | 2329 ± 1044 | 2380 ± 1105 | 1854 ± 924 | 1947 ± 949 |
| Alcohol (g/d) | 17.3 ± 35.9 | 14.6 ± 32.6 | 5.6 ± 23.9 | 4.3 ± 14.9 |
| Red meat (g · 1000 kcal−1 · d−1) | 29.1 ± 15.7 | 29.5 ± 17.1 | 25.0 ± 16.4 | 24.4 ± 15.9 |
| Folate intake (μg/d) | 503 ± 330 | 548 ± 369 | 502 ± 357 | 528 ± 358 |
| Vitamin D (IU · kcal −1 · d −1) | 61.9 ± 37.5 | 62.9 ± 40.6 | 68.4 ± 44.0 | 69.6 ± 45.1 |
| Calcium (mg/d) | 887 ± 513 | 965 ± 564 | 954 ± 653 | 1059 ± 700 |
1
All values are ± SD or percentage ± SE.
2
For current and past smokers only.