Table I.
Patient characteristics.
| Controls (n=370) n (%) |
Cases (n=370) n (%) |
χ2 | P-value | |
|---|---|---|---|---|
| Age (years) | ||||
| <45 | 67 (18.1) | 51 (13.8) | 4.523 | 0.104 |
| 45–60 | 167 (45.1) | 158 (42.7) | ||
| >60 | 136 (36.8) | 161 (43.5) | ||
| Gender | ||||
| Male | 196 (53.0) | 204 (55.1) | 0.348 | 0.555 |
| Female | 174 (47.0) | 166 (44.9) | ||
| Location | ||||
| Colon | 237 (64.1) | |||
| Rectum | 133 (35.9) | |||
| Dukes’ stage | ||||
| A | 33 (8.9) | |||
| B | 131 (35.4) | |||
| C | 206 (55.7) | |||
Colorectal carcinomas covering Dukes’ stages A, B and C, with more specimens in Dukes’ stage C, representing invasive stage, compared with the less invasive stages corresponding to Dukes’ stages A and B.