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Table 4 Subgroup analyses of primary outcomes

From: Proportional modes versus pressure support ventilation: a systematic review and meta-analysis

Outcomes No. of trials (PAV/NAVA) Total sample size Summary estimates (95% confidence intervals) Heterogeneity p value (test for subgroup difference)
Q df I2 (%)
AI as continuous outcome PAV, 1 32 WMD − 0.45 (− 1.00, 0.10) 0.00 0 0.06
NAVA, 7 268 WMD − 3.06 (− 5.74, − 0.39) 35.53 6 83.1  
AI > 10% PAV, 2 110 RR 0.06 (0.01, 0.46) 0.00 1 0.0 0.57
NAVA, 5 151 RR 0.20 (0.05, 0.92) 15.47 4 59.5  
Weaning failure PAV, 3 317 RR 0.44 (0.26, 0.75) 0.60 2 0.0 NA
Duration of mechanical ventilation PAV, 3 318 WMD − 2.25 (− 3.86, − 0.65) 3.13 2 36.5 0.16
NAVA, 2 161 WMD − 0.03 (− 2.66, 2.61) 0.03 1 0.0  
  1. AI asynchrony index, RR risk ratio, WMD weighed mean difference