Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Gallstone-related complications
RCT	64 people with acute cholecystitis	Gallstone-related events (admissions for pain, recurrent cholecystitis, and pancreatitis) 6/31 (19%) with cholecystectomy 12/33 (36%) with observation	P = 0.16		Not significant