FIGURE 4.

Meta‐analysis for all included studies of acute lung injury and bronchopulmonary dysplasia that reported the secondary outcome of alveolar capillary permeability. Data is presented as a forest plot with standardized mean difference and 95% confidence intervals. Effect sizes < 0 favours EV treatment and > 0 favours control. Subscript denotes a separate study or article that was published within the same year. The ‘Overall Efficacy’ represents a pooled estimate of MSC‐EV effect on lung vascular permeability from all studies combined. I² value represents the statistical heterogeneity