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.