Table 1.
Characteristics of patients with colorectal cancer (CRC) and controls (mean ± SD)
| Patients with CRC (n = 326) | Controls (n = 369) | |
| Age (yr) | 62.7 ± 11.7 | 64.5 ± 10.7 |
| Male gender | 195 (59.8%) | 218 (59.1%) |
| Female gender | 131 (40.2%) | 151 (40.9%) |
| Localization of tumor1 | ||
| Proximal2 | 101 (31.0%) | |
| Distal3 | 222 (68.1%) |
1
Note that the localization of the tumor was unknown in 3 patients;
2
Proximal tumor: cecum, ascending and transverse colon;
3
Distal tumor: descending colon, sigmoid, rectosigmoid junction and rectum.