Table 2.
Results of subgroup analysis.
| Subgroup | Incidence | Mortality for colorectal cancer | Mortality for all causes | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Study | RR [95%CI] | P value | I2 | Study | RR [95%CI] | P value | I2 | Study | RR [95%CI] | P value | I2 | |
| Total | 7 | 0.80 [0.77, 0.83] | <0.00001 | 46% | 5 | 0.74 [0.69, 0.80] | <0.00001 | 13% | 3 | 1.03 [0.99, 1.07] | 0.13 | 60% |
| Intervention | 7 | |||||||||||
| Colonoscopy | 2 | 0.95 [0.65, 1.37] | 0.77 | 58% | 1 | 0.92 [0.69, 1.21] | 0.54 | NA | 1 | 1.00 [0.96, 1.04] | 0.91 | NA |
| Sigmoidoscopy | 5 | 0.79 [0.76, 0.83] | 0.03 | 48% | 4 | 0.73 [0.67, 0.79] | <0.00001 | 0% | 2 | 1.05 [1.01, 1.09] | 0.009 | 24% |
| Control group | 7 | |||||||||||
| No intervention | 5 | 0.80 [0.77, 0.83] | <0.00001 | 50% | ||||||||
| Fit | 2 | 0.83 [0.70, 0.99] | 0.75 | 66% | ||||||||
RR, Risk ratio; CI, confidence interval; Fit, Fecal immunochemical test; NA, Not available.