BMI	Body mass index
CI	Confidence interval
CKD	Chronic kidney disease
COPD	Chronic obstructive pulmonary disease
CVD	Cerebrovascular disease
DM	Diabetes mellitus
HIV	Human immunodeficiency virus
HFNC	High flow nasal cannula
ICU	Intensive care unit
IMV	Invasive mechanical ventilation
MRSA	Methicillin-resistant Staphylococcus aureus
MSSA	Methicillin-sensitive Staphylococcus aureus
NIMV	Noninvasive mechanical ventilation
PVD	Peripheral vascular disease
RR	Relative risks
RRR	Relative risk ratio
RRT	Renal replacement therapy
SOFA	Sequential Organ Failure Assessment