Kang 2012.

Methods	Randomised clinical trial, South Korea
Participants	60 elderly hospitalised adults older than 65 years and admitted to the hospital for hip fracture surgery, at nutritional risk due to being frail elderly Male:female = not stated Mean age = 80.7 years
Interventions	Experimental group: ONSs, trace elements supplements and dietetic counselling for 2 weeks postoperatively (n = 30) Control group: usual care (n = 30)
Outcomes	MNA, hand‐grip strength
Study dates	Not stated
Notes	Only abstract. 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 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 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.