. 2021 Aug 16;14:40. doi: 10.1186/s13040-021-00276-5

Table 1.

Variables summary

Variable type	Variable
Demographic characteristics	age^a,b, gender, ethnicity, BMI^a, admission type^a,b
Vital signs	max HR^b, min HR^a,b, max RR^a, min RR^a, max temperature^b, min temperature^a, max SBP^b, min SBP^a,b, max DBP, min DBP, max MAP, min MAP^a,c, max SpO2, min SpO2^a
Consciousness	min GCS^a,b,c
Laboratory tests	max pH^a, min pH^a, max PaO2, min PaO2^a, max PaCO2^a, min PaCO2, max bicarbonate, min bicarbonate^b, min PaO2/FiO2^a,b,c, max WBC^a,b, min WBC^a,b, max hematocrit, min hematocrit, max platelet, min platelet^a,c, max hemoglobin^a, min hemoglobin, max bilirubin^a,b,c, min bilirubin^a, max albumin^a, min albumin^a, max creatinine^a,c, min creatinine, max BUN^b, min BUN^a, max sodium^b, min sodium^a,b, max potassium^b, min potassium^a,b, max glucose, min glucose, max lactate^a, min lactate^a, max PT^a, min PT
Comorbidities	AIDS^a,b, hematological tumor^a,b, metastatic cancer^a,b
Pivotal treatments	Mechanical ventilation^a,b,c (including invasive and noninvasive ventilation), Renal replacement therapy^a, Max dose of vasoactive drugs (dopamine^c, dobutamine^c, epinephrine^c, norepinephrine^c)
Fluid balance	24 h Urine output^a,b,c

Abbreviations: BMI body mass index, HR heart rate, RR respiratory rate, SBP systolic blood pressure, DBP diastolic blood pressure, MAP mean arterial pressure, GCS Glasgow Coma Scale, WBC white blood cell count, PT prothrombin time

^aFirst subset: variables selected by stepwise regression model

^bSecond subset: SAPS II related variables

^cThird subset: SOFA related variables