Table 1.
Selected characteristics among female cases and controls
| Characteristic | Cases (N = 169) | Controls (N = 586) | P-value |
|---|---|---|---|
| Age (mean yrs) | 59.5 | 57.3 | 0.0004 |
| Ethnicity, % white | 82.0 | 86.1 | 0.20 |
| Body mass index, | |||
| ≤ 24.9 kg/m2 | 39.1 | 39.3 | 0.96 |
| 25.0 – 29.9 kg/m2 | 30.8 | 29.7 | |
| ≥ 30.0 kg/m2 | 30.2 | 31.1 | |
| Family history, % | |||
| Colorectal cancer or adenomatous polyp | 21.7 | 17.4 | 0.21 |
| Education, % | |||
| ≤ High school | 24.9 | 23.1 | 0.61 |
| Some college | 30.8 | 28.9 | |
| College graduate | 23.7 | 22.2 | |
| > College | 20.7 | 25.8 | |
| Smoking status, % | |||
| Never | 51.5 | 62.5 | 0.0006 |
| Former | 27.8 | 27.6 | |
| Current | 20.7 | 9.9 | |
| Alcohol use, % | |||
| Never | 75.2 | 75.6 | 0.97 |
| Former | 11.2 | 10.6 | |
| Current | 13.6 | 13.9 | |
| Physical activity, % | |||
| Regularly exercise | 56.8 | 59.6 | 0.52 |
| Non-steroidal anti-inflammatory drugs, % | |||
| Current user | 43.0 | 41.5 | 0.79 |