Hwang 1991.

Methods	Randomised clinical trial, Taiwan
Participants	24 hospitalised adults undergoing choledocholithotomy, at nutritional risk according to the trialist Male:Female = 11:13 Mean age = 51.5 years Exclusion criteria: displayed prominent jaundice, sepsis or complicated medical problems
Interventions	Experimental group: Enteral feeding (hospital blenderised diet consisting of 17% protein, 33% fat and 50% carbohydrate) through a tube on 1st postoperative day until the 4th day. (n = 12) Control group: Nothing until 4th day (n = 12) Co‐interventions: Blenderised diet for additionally 4 days
Outcomes	Daily intake/output and nitrogen balance, middle arm circumference, triceps skinfold, creatinine‐height index, liver function, serum albumin, pre‐albumin, transferrin, total lymphocyte count
Study dates	Not stated
Notes	We contacted the authors on 19th August 2015 by email: hwangtl@adm.cgmh.org.tw. We received no reply.
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	Unclear risk	Not described
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, but the trial did not report on all‐cause mortality and serious adverse events.
For‐profit bias	Unclear risk	It was unclear how the trial was funded.
Other bias	Low risk	The trial appeared to be free of other components that could put it at risk of bias.