Variables | Patients, n (%) | Controls, n (%) | P-value |
---|---|---|---|
Total cases | 420 | 555 | Â |
Gender | Â | Â | Â |
   Male | 280 (66.67) | 339 (61.08) | 0.084 |
   Female | 140(33.33) | 216 (38.92) |  |
Age | Â | Â | Â |
Mean ± SD | 62.88 ± 12.32 | 61.71 ± 10.65 | 0.113 |
≤ 60 | 186(44.29) | 271 (48.83) | 0.082 |
>60 | 234(55.71) | 284 (51.17) | Â |
Smoking status (Pack-year) | Â | Â | Â |
Non-smoker | 316 (73.24) | 406 (73.15) | 0.508 |
Smoker | 104(24.76) | 149(26.85) | Â |
Alcohol consumption (year) | Â | Â | Â |
Never | 274(65.24) | 379 (68.29) | 0.514 |
≤ 15 | 119 (28.33) | 139(25.05) |  |
> 15 | 27 (6.43) | 37 (6.67) | Â |
Tumor site | Â | Â | Â |
Colon | 191(45.48) | -- | -- |
Rectal | 229(54.52) | -- | Â |