Maroske 1981.

Methods	Randomised controlled trial
Participants	Country: Germany Number randomised: 24 Post‐randomisation exclusions: not stated Revised sample size: 24 Mean age: not stated Females: not stated Mean duration of follow‐up: not stated Inclusion criteria People with acute haemorrhagic (necrotising) pancreatitis
Interventions	Participants were randomly assigned to 1 of 2 groups Group 1: open necrosectomy (n = 12) Pancreatic resection was performed as necessary Group 2: peritoneal lavage (n = 12) Not clear whether the peritoneal lavage was performed percutaneously or by open surgery
Outcomes	Mortality
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Comment: this information was not available
Allocation concealment (selection bias)	Unclear risk	Comment: this information was not available
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Comment: this information was not available
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Comment: this information was not available
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	Comment: this information was not available
Selective reporting (reporting bias)	High risk	Comment: complications were not reported
Other bias	Unclear risk	Comment: source of funding was not available. There was no other bias