Final answer:
Enteral feeding started within 24 hours of admission to ICU has been shown to improve length of stay and mortality.
Step-by-step explanation:
The enteral feeding that should be started within 24 hours of admission to the Intensive Care Unit (ICU) has been shown to improve length of stay and mortality. Enteral feeding refers to the delivery of nutrition directly into the gastrointestinal tract, usually through a feeding tube. By starting enteral feeding within 24 hours, it allows for early nutrition support, which has been associated with better outcomes in critically ill patients.