| Two‐stage meta‐analysis based on random‐effects Cox model |
ESA versus control HR (95% CI) |
| Radiotherapy/radiochemotherapy with prespecified treatment protocol | 1.39 (0.812.40) |
| Radiotherapy/radiochemotherapy without prespecified treatment protocol | 1.69 (0.773.73) |
| Overall | 1.48 (0.95‐2.32) |
| LR test | 0.6233 |
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