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Secondary outcome for specific pulmonary complications. ARDS acute respiratory distress syndrome, CI confidence interval, M-H Mantel-Haenszel
| Outcome | No. of studies | No. of patients | Analysis | Effect (95% CI) | P value |
|---|---|---|---|---|---|
| Chest infection or pneumonia | 45 | 6969 | M-H odds ratio | 0.72 (0.60–0.86) | P = 0.0003 |
| ARDS | 15 | 2491 | M-H odds ratio | 0.57 (0.31–1.02) | P = 0.06 |
| Pulmonary oedema | 23 | 3205 | M-H odds ratio | 0.47 (0.30–0.73) | P = 0.0008 |
| Pulmonary embolism | 28 | 5430 | M-H odds ratio | 1.08 (0.59–1.95) | P = 0.81 |
