Fletcher 1986b.

Methods	Randomised clinical trial, Australia
Participants	28 adult hospitalised patients admitted for aortic grafting, at nutritional risk due to major surgery Male:Female = 22:6 Mean age: 64 years
Interventions	Experimental group 2: Enteral nutrition(n = 9) Control group: Standard intravenous fluids postoperatively(n = 4)
Outcomes	Nitrogen intake and balance, mortality, complications, length of stay
Study dates
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	The trial was described as being randomised, but it was unclear how the sequence was generated.
Allocation concealment (selection bias)	Unclear risk	The trial was described as being randomised, but it was unclear how the allocation was concealed.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Only experimental group two received an enteral 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)	Unclear risk	No protocol could be obtained, and the trial did not report serious adverse events properly (only total complications, not by group).
For‐profit bias	High risk	The trial was funded by Bristol‐Myers Squibb.
Other bias	Low risk	The trial appeared to be free of other components that could put it at risk of bias.