Risk of colorectal cancer in first degree relatives compared with the general population
| Colorectal cancer in first degree relatives | |||||
|---|---|---|---|---|---|
| Group | No of patients | Observed | Expected in general population | Relative risk | p Value7-150 |
| Group 1 (comparison group) | 444 | 41 | 23.1 | 1.8 | <0.0005 |
| Group 1 (first 5 years) | 190 | 21 | 11.7 | 1.8 | <0.001 |
| Group 2 (study group) | 128 | 50 | 15.7 | 3.2 | <0.00001 |
| Group 2cr | 42 | 12 | 5.8 | 2.1 | 0.02 |
| Group 2st | 28 | 9 | 3.9 | 2.3 | 0.02 |
| Group 2ov | 26 | 15 | 2.5 | 6.1 | >0.00001 |
| Group 2en | 24 | 13 | 2.5 | 5.1 | >0.00001 |
↵7-150 Poisson distribution.
Relative risk was calculated by comparing the incidence of colorectal cancer in relatives with the expected age and sex matched incidence in the general population.