Førli 2001.

Methods	Randomised clinical trial (stratified for age and sex), Norway
Participants	42 underweight hospitalised adults with end‐stage pulmonary disease referred to the hospital to be evaluated for lung transplantation, at nutritional risk due to low BMI Male:Female = 20:22 Mean age = 48.5 years Exclusion criteria: Unwillingness to participate and eat the prescribed diet, too sick to be able to co‐operate and leave of absence due to the possibility of eating meals outside the hospital
Interventions	Experimental group: Energy‐rich diet 10 MJ/day + offered extra meals(n = 20) Control group: Regular hospital diet 8.5 ‐ 9 MJ/day(n = 22)
Outcomes	Weight, BMI, energy intake, mortality, pulmonary function
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)	Low risk	The trial used random‐number tables.
Allocation concealment (selection bias)	Unclear risk	Not described
Blinding of participants and personnel (performance bias) All outcomes	High risk	The trial was described as unblinded
Blinding of outcome assessment (detection bias) All outcomes	High risk	The trial was described as unblinded
Incomplete outcome data (attrition bias) All outcomes	High risk	Above 5% dropouts and the trial did not allow proper methodology for an intention‐to‐treat analysis.
Selective reporting (reporting bias)	Unclear risk	No protocol could be obtained, and the trial did not report all‐cause mortality or serious adverse events.
For‐profit bias	High risk	The trial was supported by the Research Council of Norway and the Norwegian Heart and Lung Association, as well as financial support from Pharmacia & Upjohn and Abbott Norway A/S.
Other bias	Low risk	The trial appeared to be free of other components that could put it at risk of bias.