Schmitz 1984.

Methods	Randomised clinical trial, Germany
Participants	40 hospitalised adults admitted because of polytraumatised and in need of ventilation, at nutritional risk due to being in an ICU. Male:Female = 26:14 Mean age = 35.4
Interventions	Experimental group 1: parenteral carbohydrates for 4 days(n = 10) Experimental group 2: parenteral carbohydrates + 1 g amino acids for 4 days(n = 10) Experimental group 3: parenteral carbohydrates + 2 g amino acids for 4 days(n = 10) Control group: i.v. fluids(n = 10)
Outcomes	Serum and urinary biomarkers (glucose, fructose), xylitconcentration, energy, urea
Study dates	Not stated
Notes	We found 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.