Abbreviation	Definition
ADA	Adenosine deaminase
AUC	Area under the curve
CI	Confidence interval
CRP	C-reactive protein
EDTA	Ethylenediaminetetraacetic acid
ICU	Intensive care unit
LDH	Lactate dehydrogenase
NPV	Negative predictive value
OR	Odds ratio
PE	Pleural effusion
PPV	Positive predictive value
RBC	Red blood cell
ROC	Receiver operating characteristic
sCD14-ST	Soluble CD14 subtype
SPSS	Statistical Package for the Social Sciences
suPAR	Soluble urokinase plasminogen activator receptor
U/L	Units per liter
WBC	White blood cell