Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Mortality
Systematic review	184 people (150 men, 34 women), mean age range 43 to 47 years 4 RCTs in this analysis	Mortality 0/91 (0%) with pancreaticoduodenectomy 2/93 (2%) with duodenum-preserving pancreatic head resection	Significance not assessed