Outcome | Â | Studies (n) | Patients (n) | WMD | 95 % CI | I2 (%) | P value |
---|---|---|---|---|---|---|---|
PaO2/FiO2 ratio | Total | 259 | 11.04 mmHg | 0.30 to 21.77 | 3 | 0.04 | |
Crossover studies | 204 | 12.84 mmHg | 1.21 to 24.47 | 12 | 0.03 | ||
Non-crossover studies | 1 [26] | 55 | 0.70 mmHg | −27.15 to 28.55 | 0 | 0.96 | |
PaCO2 | Total | 229 | −0.28 mmHg | −1.14 to 0.58 | 0 | 0.52 | |
Crossover studies | 174 | −0.32 mmHg | −1.22 to 0.58 | 0 | 0.49 | ||
Non-crossover studies | 1 [26] | 55 | 0.10 mmHg | −2.71 to 2.91 | 65 | 0.94 | |
Peak inspiratory Pressure | Total | 259 | −4.91cmH2O | −7.30 to −2.53 | 91 | <0.0001 | |
Crossover studies | 204 | −5.27cmH2O | −7.98 to −2.57 | 92 | <0.0001 | ||
Non-crossover studies | 1 [26] | 55 | −3.10cmH2O | −4.79 to −1.41 | 0 | <0.0001 | |
Plateau inspiratory Pressure | Total | 229 | −1.13cmH2O | −2.54 to 0.28 | 80 | 0.12 | |
Crossover studies | 174 | −1.44cmH2O | −3.06 to 0.18 | 83 | 0.08 | ||
Non-crossover studies | 1 [26] | 55 | 0.20cmH2O | −1.49 to 1.89 | 0 | 0.82 | |
Mean inspiratory Pressure | Total | 201 | 0.08cmH2O | −0.38 to 0.54 | 60 | 0.74 | |
Crossover studies | 146 | −0.15cmH2O | −0.48 to 0.18 | 0 | 0.38 | ||
Non-crossover studies | 1 [26] | 55 | 0.70cmH2O | 0.11 to 1.29 | 0 | 0.02 |