| Two‐stage meta‐analysis based on random‐effects Cox model | Including prematurely stopped studies | Excluding prematurely stopped studies |
| ESA versus control | HR (95% CI) | HR (95% CI) |
| Chemotherapy | 1.09 (0.97‐1.23) | 1.05 (0.91‐1.21) |
| Radiotherapy/radiochemotherapy | 1.48 (0.95‐2.32) | 1.22 (0.46‐3.29) |
| Mixed | 1.50 (0.62‐3.66) | 1.72 (0.67‐4.41) |
| None | 1.32 (1.06‐1.65) | 1.28 (1.01‐1.63) |
| Overall | 1.16 (1.05‐1.29) | 1.11 (0.99‐1.25) |
| LR test | 0.2715 | 0.4088 |
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