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Table 1 Subgroup analysis based on study data type for chance of cumulative survival

From: Prone positioning in acute respiratory distress syndrome during venovenous extracorporeal membrane oxygenation

Data type

No. of studies

RR (95% confidence interval)

P value

P value for interaction

Non-PSM

4

0.98 [0.54–1.79]

0.95

0.354

PSM

3

1.33 [1.07–1.64]

0.0086

  1. PSM Propensity score matched