| 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 | 1.04 (0.97‐1.11) | 1.01 (0.94‐1.08) |
| Radiochemotherapy | 0.98 (0.75‐1.27) | 2.00 (0.65‐6.15) |
| Radiotherapy | 1.17 (0.96‐1.42) | 1.27 (0.96‐1.69) |
| Mixed | 1.50 (0.62‐3.66) | 1.72 (0.67‐4.41) |
| None | 1.22 (1.04‐1.44) | 1.19 (1.00‐1.42) |
| Overall | 1.06 (1.00‐1.12) | 1.05 (0.98‐1.42) |
| LR test | 0.11 | 0.1128 |
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