SIRS	systemic inflammatory response syndrome
SOFA	sequential organ failure assessment
qSOFA	quick SOFA
APACHE evaluation	acute physiology and chronic health
PCT	procalcitonin
SD	standard deviation
BMI	body mass index
CRP	C-reactive protein
SAPS	simplified acute physiology score
COPD	chronic obstructive pulmonary disease
AP	arterial pressure
AKI	acute kidney injury
mmHg	millimeters of mercury
mg	milligram
dL	deciliter
INR	international normalized ratio
mm3	cubic millimeter
PaO2	partial pressure of oxygen
FiO2	fraction of inspired oxygen
ICU	intensive care unit
UTI	urinary tract infection
USF	Universidade São Francisco
QC	quality control
PCA	principal component analysis
AUC	area under curve
ROC	receiver operating characteristic
RF	random forest
MSI	Metabolomics Standards Initiative
QC-RFSC correction	quality control random forest based signal
IQR	interquartile range
MCCV	Monte Carlo cross-validation
MS	mass spectrometry
HMDB	Human Metabolome Database
PC	phosphatidylcholine
PG	phosphatidylglycerol
ANOVA	analysis of variance
UPLC	ultra performance liquid chromatography
ACN	MS data-independent acquisition
MSE	n acetonitrile
EDTA	ethylenediamine tetraacetic acid
QTOF	quadrupole time-of-flight mass spectrometry
FAHFA	fatty acid esters of hydroxy fatty acids
TCA	tricarboxylic acid cycle
GSL	glycosphigolipids
LC-MS	liquid chromatography–mass spectrometry