Association Between the Ultrasound Evaluation of Muscle Mass and Adverse Outcomes in Critically Ill Patients: A Prospective Cohort Study.

Background: Computed tomography (CT)-derived low muscle mass is associated with adverse outcomes in critically ill patients. Muscle ultrasound is a promising strategy for quantitating muscle mass. We evaluated the association between baseline ultrasound rectus femoris cross-sectional area (RF-CSA) and intensive care unit (ICU) mortality.