Foschi 1986.

Methods	Randomised clinical trial, Italy
Participants	64 hospitalised adults with obstructive jaundice, with serum bilirubin above 200 µmol undergoing percutaneous transhepatic biliary drainage, at nutritional risk due to undergoing major surgery Male:Female = 39:21 (gender not reported for four participants) Mean age = 63.5 years Exclusion criteria: None stated
Interventions	Experimental group: Either enteral (19 participants) or parenteral nutrition (4 participants) or both (5 participants). Enteral nutrition was Precision BR with 10% peptides, 0.8% lipid, 81.9% carbohydrate; parenteral nutrition was Freamine III (50% dextrose and 8.5% amino acid). All nutrition was for at least 12 days preoperatively.(n = 28) Control group: no intervention(n = 32) Co‐interventions: percutaneous trans‐hepatic biliary drainage and standard care
Outcomes	Complications, mortality
Study dates	Not stated
Notes	We contacted the authors on 6th April 2016 by email: Diego.Foschi@unimi.it. 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	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	There are > 5% dropouts and it is unclear how the trial handles missing data.
Selective reporting (reporting bias)	Low risk	The trial reports complications and mortality.
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.