Pupelis 2001.

Methods	Randomised clinical trial, Latvia
Participants	60 hospitalised adults undergoing surgery for peritonitis and severe pancreatitis. None of the included participants received TPN before surgery. At nutritional risk due to major surgery Male:Female = 45:15 Mean age = 51.4 years Exclusion criteria: none specified
Interventions	Experimental group: Jejunal feeding was started during the 1st 12 hrs postoperatively in the ICU with full‐strength whole‐protein formula (1 kcal/mL) or oligopeptide‐based formula (1 kcal/mL), providing at least 300 mL each day.(n = 30) Control group: Standard intravenous fluids(n = 30)
Outcomes	Complications, SIRS, death caused by multiple organ dysfunction syndrome, mortality
Study dates	January 1997 to April 1999
Notes	We contacted the authors on 23rd June 2015 by email: pupelis@gailes.lv. We received no reply.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not described
Allocation concealment (selection bias)	Unclear risk	Not described
Blinding of participants and personnel (performance bias) All outcomes	High risk	Only the experimental group received a tube.
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	Not described
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	The number of participants with incomplete data was not reported.
Selective reporting (reporting bias)	Low risk	No protocol was found. Serious adverse events and all‐cause mortality were reported.
For‐profit bias	High risk	The trial was funded by Amaija ltd. (Nutrition manufacturer).
Other bias	Low risk	The trial appeared to be free of other components that could put it at risk of bias.