Table 4.
Incidence and mortality rates for colorectal cancer between 1985 and 1998
| Screening | Controls | |
| Observation years during follow up | 352 343 | 351 670 |
| Colorectal cancer | ||
| No patients | 649 | 637 |
| Incidence rate* | 1.84 | 1.81 |
| Incidence ratio | 1.02 (0.91–1.14)† | |
| Death from all causes | ||
| No deaths | 8732 | 8724 |
| Mortality rate* | 24.78 | 24.80 |
| Mortality ratio | 1.00 (1.00–1.00)† | |
| Death from colorectal cancer | ||
| No deaths | 255 | 310 |
| Mortality rate* | 0.72 | 0.88 |
| Mortality ratio | 0.82 (0.69–0.97)† | |
| Death from colorectal cancer‡ | ||
| No deaths | 292 | 341 |
| Mortality rate* | 0.83 | 0.97 |
| Mortality ratio | 0.85 (0.73–1.00)† | |
| Mortality ratio adjusted for age and sex | 0.86 (0.73–1.00)† | |
| Death from colorectal cancer proximal to sigmoid colon‡ | ||
| No deaths | 89 | 123 |
| Mortality rate* | 0.25 | 0.35 |
| Mortality ratio | 0.72 (0.55–0.95) | |
| Deaths from distal colorectal cancer‡ | ||
| No deaths | 196 | 212 |
| Mortality rate* | 0.56 | 0.60 |
| Mortality ratio | 0.92 (0.76–1.12) |
*Per 1000 person years; †95% confidence limits; ‡including complications from treatment.