Risk factors for colorectal cancer among patients with diagnosis of colorectal cancer after ulcerative colitis (n=8)
| Total n=8 | HR | 95% CI | P value | |
| Age (years) | ||||
| ≤0 (reference) | 2 | 1 | ||
| 41–50 | 2 | 1.03 | 0.25 to 39.52 | 0.97 |
| 51–70 | 1 | 1.97 | 0.06 to 6.21 | 0.54 |
| >70 | 3 | 15.68 | 1.31 to 187.92 | 0.03 |
| Female (reference) | 3 | 1 | 0.39 to 6.98 | 0.48 |
| Male | 5 | 1.67 | ||
| Extent of colitis at any time | ||||
| Proctitis and left sided (reference) | 2 | 1 | 0.90 to 15.84 | 0.07 |
| Extensive | 6 | 3.78 | ||
| Primary sclerosing cholangitis | 1 | 3.70 | 0.45 to 30.16 | 0.22 |