Definition 2: <6 month vs. >=6 month
There was no significant difference in length of hospital stay (MD,
-0.09; 95% Cl, -0.54 to 0.37; P=0.70), with high heterogeneity
(I2=62%). The sensitivity analysis indicated that noteworthy
heterogeneity existed in two studies by Conforti2009 and Duron2020.
Furthermore, when we omitted them, the heterogeneity decreased from 62%
to 0% with a statistically significant p-value (P=0.005). The
heterogeneity may have resulted from the small sample size in both
trials. The heterogeneity may have resulted from the small sample size
in both trials.