Luo 2011.

Methods	Randomised clinical trial, China
Participants	127 hospitalised adults admitted due to hip fracture surgery within 14 days of fracture and serum albumin levels < 38 g/l as well as moderately malnourished, at nutritional risk due to being frail elderly Male:Female = not stated Mean age = not stated Exclusion criteria: none stated
Interventions	Experimental group: ONS 3 times a day (100 ml between meals and 200 ml as evening snack). Each 200 ml (389 kcal, 17 g protein, 18 g fat, 40 g CHO) for 28 days (n = 63) Control group: No intervention(n = 64) Co‐interventions: Standard hospital diet
Outcomes	Weight, serum albumin, pre‐albumin, total protein, suture status and functional recovery status
Study dates	Not stated
Notes	We could obtain no contact information for the authors.
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	The reasons for dropouts were unclear.
Selective reporting (reporting bias)	Unclear risk	No protocol could be obtained, and the trial did not report on all‐cause mortality or 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.