Definition 1: <3 month vs. >=3 month
There was no discrepancy in length of stay (MD, 0.84; 95% Cl, −0.40 to
2.09; P=0.18), with very high heterogeneity (I2=86%). The sensitivity
analyses revealed noteworthy heterogeneity in the two studies from
Eric2018 and Gulack2017. Furthermore, when we omitted them, the
heterogeneity decreased from 86% to 0% with a statistically
significant p-value (P<0.0001). The heterogeneity may have
resulted from the experiments in different countries. Publication bias
was assessed and not detected.