Research Article
Prone versus Supine Position Ventilation in Adult Patients with Acute Respiratory Distress Syndrome: A Meta-Analysis of Randomized Controlled Trials
Table 3
Subgroup analysis for mortality.
| Factor | Subgroups | Number of studies | RR and 95% CI | value | Heterogeneity (%) | value for heterogeneity | value between subgroups |
| Sample size | ≥100 | 5 | 0.89 (0.74–1.06) | 0.198 | 70.0 | 0.010 | 0.135 | <100 | 6 | 0.69 (0.47–1.02) | 0.064 | 0.0 | 0.942 |
| Mean age (years) | ≥60.0 | 3 | 0.98 (0.86–1.12) | 0.768 | 0.0 | 0.608 | 0.245 | <60.0 | 8 | 0.77 (0.60–0.99) | 0.042 | 51.6 | 0.044 |
| Percentage male (%) | ≥70.0 | 7 | 0.99 (0.90–1.10) | 0.906 | 0.0 | 0.582 | 0.001 | <70.0 | 4 | 0.70 (0.58–0.85) | <0.001 | 0.0 | 0.595 |
| Duration of intervention | ≥3.0 days | 9 | 0.87 (0.74–1.02) | 0.079 | 50.5 | 0.040 | 0.466 | <3.0 days | 2 | 0.69 (0.32–1.51) | 0.358 | 0.0 | 0.758 |
| Protective lung ventilation | Yes | 6 | 0.77 (0.63–0.93) | 0.006 | 10.7 | 0.347 | 0.012 | No | 5 | 0.98 (0.86–1.12) | 0.759 | 18.0 | 0.300 |
| Study quality | High | 7 | 0.87 (0.72–1.05) | 0.139 | 61.2 | 0.017 | 0.329 | Low | 4 | 0.81 (0.61–1.06) | 0.119 | 0.0 | 0.943 |
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