Meta-regression for variables that influence the incidence of DGE.

*Only one study reported the routine use of prokinetic medicine, and thus the meta-regression for this variable could not be conducted. †Solid food start days were obtained from the original publications or from the authors. If this parameter was not available, the mean days solid food in the PPPD (the conventional method) group was used. Abbreviations: PRPD, pylorus-removing pancreaticoduodenectomy; PrPD, pylorus-resecting pancreaticoduodenectomy; SSPPD, subtotal stomach-preserving pancreaticoduodenectomy; SWP, Standard Whipple procedure; NGT, Nasogastric tube. Meta-regression for variables that influence the incidence of DGE.