The hockey-stick association of energy supply in the first 72 h of critical illness may apply only to patients with a normal body mass index: a post-hoc analysis of a prospective observational multicenter study

The association between daily delivered calories within the first 72 h of ICU admission and 28-day mortality in critically ill patients showed a hockey-stick association, which was observed only in patients with a BMI of 18.5-24.9 kg/m². However, no similar relationship was found in patients with a BMI of 25-30 kg/m². These findings should be interpreted as exploratory and hypothesis-generating, and further studies are needed to confirm and extend these observations.