Table 4.
Subgroup analysis for RFS.
| Subgroup | No. of studies | HR(95%CI) | P | Heterogeneity I2(%) | Ph |
|---|---|---|---|---|---|
| Population | |||||
| China | 2 | 2.09[1.45-3.01] | <0.0001 | 77.0 | 0.037 |
| Japan | 2 | 1.65[1.21-2.26] | 0.002 | 0.0 | 0.866 |
| Sample size | |||||
| >140 | 2 | 1.67[1.27-2.20] | <0.0001 | 0.0 | 0.963 |
| ≤140 | 2 | 2.35[1.48-3.74] | <0.0001 | 73.5 | 0.052 |
| Study quality | |||||
| High | 3 | 1.94[1.42-2.66] | <0.0001 | 59.6 | 0.084 |
| Low | 1 | 1.68[1.17-2.41] | 0.005 | – | – |
| Cut-off | |||||
| 2 | 1 | 1.58[0.86-2.92] | 0.144 | – | – |
| 3 | 2 | 2.09[1.45-3.01] | <0.0001 | 77.0 | 0.037 |
| 4 | 1 | 1.68[1.17-2.41] | 0.005 | – | – |
| Tumor type | |||||
| Mixed | 1 | 1.68[1.17-2.41] | 0.005 | – | – |
| CCA | 3 | 1.94[1.42-2.66] | <0.0001 | 59.6 | 0.084 |