Definition 1: <3 month vs. >=3 month
There was discrepancy in operative time (MD, -41.35; 95% Cl, −58.86 to
-23.85; P <0.00001), with moderate to high heterogeneity
(I2=37%). When omitting Li2022, the heterogeneity decreased to 0%, the
p-value was still statistically significant (P<0.00001). The
heterogeneity may have resulted from the article didn’t published.
Publication bias was assessed and not detected.