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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 Overall survival | 17 | Hazard Ratio (95% CI) | Subtotals only | |
| 1.1 Platinum based chemoradiotherapy | 11 | 1670 | Hazard Ratio (95% CI) | 0.83 [0.71, 0.97] |
| 1.2 Non‐platinum based chemoradiotherapy | 6 | 1458 | Hazard Ratio (95% CI) | 0.77 [0.63, 0.94] |
