Table 1.
Baseline characteristics of colorectal cancer case patients and subcohort members of JPHC
| Subcohort (n=774) | Colorectal cancer (n=457) | |||
|---|---|---|---|---|
| Age At Enrollment, mean ± SD, years | 60.1 ± 7.5 | 60.3 ± 7.2 | ||
| Male, % | 413 | (53.4%) | 219 | (47.9%) |
| Family Hx of Colorectal Cancer, %* | 15 | (1.9%) | 11 | (2.4%) |
| Smoking | ||||
| Never | 452 | (58.4%) | 275 | (60.2%) |
| Former | 134 | (17.3%) | 74 | (16.2%) |
| Current ≤20 cig/day | 129 | (16.7%) | 74 | (16.2%) |
| Current >20 cig/day | 47 | (6.1%) | 29 | (6.3%) |
| Unknown | 12 | (1.6%) | 5 | (1.1%) |
| Alcohol Drinking, % | ||||
| Never/occasional | 552 | (71.3%) | 313 | (68.5%) |
| 1+ per day and <300 g/week | 135 | (17.4%) | 77 | (16.8%) |
| 1+ per day and =300 g/week | 64 | (8.3%) | 50 | (10.9%) |
| Unknown | 23 | (3.0%) | 17 | (3.7%) |
| BMI, % | ||||
| <21kg/m2 | 155 | (20.0%) | 81 | (17.7%) |
| 21-22.9 kg/m2 | 189 | (24.4%) | 112 | (24.5%) |
| 23-26.9 kg/m2 | 331 | (42.8%) | 203 | (44.4%) |
| ≥27 kg/m2 | 87 | (11.2%) | 53 | (11.6%) |
| Unknown | 12 | (1.6%) | 8 | (1.8%) |
| Physical Activity (METs/day) , % | ||||
| ≥42.7 | 160 | (20.7%) | 121 | (26.5%) |
| 34.3-42.6 | 148 | (19.1%) | 63 | (13.8%) |
| 31.9-34.2 | 178 | (23.0%) | 94 | (20.6%) |
| < 31.8 | 259 | (33.5%) | 160 | (35.0%) |
| Unknown | 29 | (3.7%) | 19 | (4.2%) |
| History of Diabetes, % | ||||
| No | 311 | (40.2%) | 190 | (41.6%) |
| Yes | 46 | (5.9%) | 36 | (7.9%) |
| Unknown | 417 | (53.9%) | 231 | (50.5%) |