| Studies | HR with 95% CI | P heterogeneity | P values | N |
---|---|---|---|---|---|
Overall survival | 7 | 1.13 (0.63–2.04) | 0.001 | 0.673 | 835 |
Progression-free survival | 5 | 1.18 (0.70–1.98) | 0.001 | 0.532 | 495 |
Disease-specific survival | 1 | 0.607 (0.399–0.925) | NA | 0.02 | 195 |
Disease-free survival | 1 | NA | NA | > 0.05 | 112 |