APACHE II	Acute Physiology Assessment and Chronic Health Evaluation
AUC	area under the curve
BSI	bloodstream infection
CI	confidence interval
CR	colistin-resistant
CRG	colistin-resistant group
CSG	colistin-sensitive group
CVC	central venous catheter
EUCAST	European Committee On Antimicrobial Susceptibility Testing
GN	Gram-negative
ICU	intensive care unit
IQR	interquartile range
MDR	multi-drug-resistant
SOFA	sequential organ failure assessment