Breedveld‐Peters.

Methods	Randomised clinical trial, the Netherlands
Participants	152 hospitalised adults admitted for hip fracture surgery and aged > 55 years, at nutritional risk due to being frail elderly Male:Female = 44:108 Mean age = 78.5 years Exclusion criteria: Pathological or periprosthetic fracture; a disease of bone metabolism (e.g. M Paget, M Kahler, hyperparathyroidism); an estimated life expectancy < 1 year due to underlying disease; if they used an ONS before hospital admission; if they were unable to speak Dutch, lived outside the region or had been bedridden before their hip fracture, had dementia or were cognitively impaired, defined as a score of < 7 on the Abbreviated Mental Test, as assessed before inclusion
Interventions	Experimental group: frequent dietetic counselling and multinutrient ONSs until 3 months after hip fracture surgery (n = 73) Control group: standard dietetic counselling and diet (n = 79)
Outcomes	Cost, cost effectiveness, mortality, weight, quality of life
Study dates
Notes	The trial had both an inpatient and an outpatient phase. We contacted the authors on 16th December 2015 by email: c.wyers@maastrichtuniversity.nl. We received no reply.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer‐generated random‐number sequence list
Allocation concealment (selection bias)	Unclear risk	The allocation was described as being concealed, but it was unclear how it 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	High risk	More than 5% dropouts, and the trial did not allow proper intention‐to‐treat methodology.
Selective reporting (reporting bias)	High risk	The trial did not report length of stay or rate of complications, which were stated in the protocol.
For‐profit bias	High risk	The oral nutritional supplements were provided by at nutrition company (Nutricia Advanced Medical Nutrition).
Other bias	Low risk	The trial appeared to be free of other components that could put it at risk of bias.