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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 All cause mortality | 6 | 429 | Risk Difference (M‐H, Fixed, 95% CI) | 0.0 [‐0.02, 0.02] |
| 1.1 High quality | 2 | 236 | Risk Difference (M‐H, Fixed, 95% CI) | 0.0 [‐0.02, 0.02] |
| 1.2 Low quality | 4 | 193 | Risk Difference (M‐H, Fixed, 95% CI) | 0.0 [‐0.04, 0.04] |
