Comparison 1. Hypocaloric nutrition (intervention) vs. Control.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mortality in hospital	9		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
2 Mortality in ICU	4		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
3 Mortality at 30 days	7		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
4 Length of Hospital stay (days)	10		Mean Difference (IV, Random, 95% CI)	Totals not selected
5 Length of ICU stay (days)	11		Mean Difference (IV, Random, 95% CI)	Totals not selected
6 Infectious complications	10		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
7 Length of mechanical ventilation (days)	12		Mean Difference (IV, Random, 95% CI)	Totals not selected
8 Non‐infectious complications (diarrhoea)	3		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
9 Hyperglycaemia	6		Risk Ratio (M‐H, Random, 95% CI)	Totals not selected
10 Hypoglicaemia	5		Risk Ratio (M‐H, Fixed, 95% CI)	Totals not selected
11 Nitrogen balance (g/day)	3		Mean Difference (IV, Random, 95% CI)	Totals not selected