APACH II	Acute Physiology and Chronic Health Evaluation II
ARDS	adult respiratory distress syndrome
AUC	area under the ROC curve
CCL2	chemokine C–C motif ligand-2
CCR2	chemokine C–C motif receptor-2
CPIS	clinical pulmonary infection score
CRP	C-reactive protein
CVA	cerebral vascular accident
ELISA	enzyme-linked immunosorbent assay
ICU	intensive care unit
LIS	lung injury scores
MCP-1	monocyte chemoattractant protein-1
MMP	matrix metalloproteinase
ODIN	organ dysfunctions and/or infection
OI	oxygenation index
PEEP	positive end-expiratory pressure
P/F ration	PaO2/FiO2 ration
ROC	receiver operating characteristic
SAPS II	simplified acute physiology score II
SOFA	Sequential Organ Failure Assessment score
SQ-EA	semiquantitative endotracheal aspirates
VAP	ventilator-associated pneumonia
WBC	white blood cells