Table 1 Frequencies of selected characteristics for colorectal cancer cases and matched controls a
Characteristic | Cases (N=343) | Controls (N=343) |
|---|---|---|
Age in years, mean (SD) | 59.0 (8.4) | 59.1 (8.4) |
Level of education | ||
Elementary school or less | 144 (42.0) | 154 (44.9) |
Middle school | 99 (28.9) | 87 (25.4) |
High school | 68 (19.8) | 60 (17.5) |
College | 32 (9.3) | 42 (12.2) |
Marital status | ||
Not married | 61 (17.8) | 62 (18.1) |
Married | 282 (82.2) | 281 (81.9) |
Menopausal status | ||
Pre-menopausal | 74 (21.6) | 77 (22.5) |
Post-menopausal | 268 (78.4) | 266 (77.6) |
Ever smoked cigarettes (≥1/day for 6+ months) | ||
No | 336 (98.0) | 326 (95.0) |
Yes | 7 (2.0) | 17 (5.0) |
Aspirin use in last year (3+/wk for >2 mo) | ||
No | 334 (97.4) | 329 (95.9) |
Yes | 9 (2.6) | 14 (4.1) |
Vegetable intake, g/week, mean (SD) | 303 (179) | 284 (160) |
Fruit intake, g/week, mean (SD) | 243 (167) | 248 (177) |
Folate intake, μg/day, mean (SD) | 288 (100) | 290 (99) |
Measured body mass index (BMI), mean (SD) | 24.7 (3.2) | 24.8 (3.4) |
Leisure time physical activity (MET hrs/wk), mean (SD) | 110 (44) | 108 (46) |
Cumulative occupational energy expenditure (kJ/min), mean (SD) | 243 (99) | 230 (98) |