Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Pain
RCT	74 people with chronic pancreatitis with an inflammatory mass limited to the pancreatic head, 51 evaluated, alcohol intake and age not reported	Pain score on visual analogue scale (0–100) median 8.6 years 20 with Beger ductal decompression 20 with Frey ductal decompression	P = 0.499		Not significant