Assessment of heterogeneity
We assessed heterogeneity in trial results by inspecting the forest
plots to detect non-overlappingCIs, applying theChi2 testwith a P
value of 0.10 indicating statistical significance, and implementing
the I2 statistic (with a value of 50% to denote moderate levels of
heterogeneity). In the case of heterogeneity between studies, we
made efforts to explore sources of heterogeneity due to various
factors, such as type of pneumonia and type of physiotherapy.