aHR	adjusted hazard ratio
ARDS	acute respiratory distress syndrome
BMI	body mass index
BW	body weight
CI	confidence interval
COVID-19	Coronavirus Disease 2019
d	day
del	delivery
ECMO	extracorporeal membrane oxygenation
EN	enteral nutrition
ESPEN	European Society for Clinical Nutrition and Metabolism
FiO2	Fraction of inspired oxygen
g	gram
GI	gastrointestinal
GRV	gastric residual volume
HR	hazard ratio
ICU	intensive care unit
IQR	interquartile range
kcal	kilocalories
kg	kilogram
mg	milligram
mL	milliliter
paO2	oxygen partial pressure
PN	parenteral nutrition
prop	propofol
requ	requirements
SAPS II	Simplified Acute Physiology Score II
SOFA	Sequential Organ Failure Assessment
sPN	supplemental parenteral nutrition
Std	standard deviation
tPN	total parenteral nutrition
VV	venovenous