Table 2

Univariate and multivariate logistic regression analyse variables screened by extreme gradient boosting in the development group

Univariate analysisMultivariate analysis
OR95% CIP valueOR95% CIP value
Anion gap, mEq/L1.231.15 to 1.32<0.00011.151.04 to 1.270.0083
Lactate, mmol/L1.781.48 to 2.14<0.00011.511.20 to 1.900.0004
Calcium, mg/dL0.390.27 to 0.55<0.00010.380.26 to 0.56<0.0001
Lymphocytes, %0.920.88 to 0.95<0.0001NA
White cells, ×10∧9/L1.111.06 to 1.16<0.0001NA
Heart rate, bpm1.031.02 to 1.04<0.0001NA
Sodium, mEq/L0.950.91 to 0.990.0197NA
Urine-output (first 24 hours), mL1.001.00 to 1.00<0.0001NA
Platelet count, ×10∧9/L1.000.99 to 1.000.0028NA
Blood urea nitrogen, mg/dL1.021.01 to 1.03<0.00011.031.01, 1.04<0.0001
Age, years1.021.00 to 1.040.0197NA
MCH, pg1.070.99 to 1.160.0981NA
Red cells, ×10∧12/L0.820.58 to 1.140.233NA
Creatine kinase (CK), IU/L1.001.00 to 1.000.1528NA
PaCO2, mm Hg0.980.96 to 1.000.0398NA
Potassium, mEq/L1.921.23 to 2.990.0042NA
Diastolic blood pressure, mm Hg0.970.95 to 0.990.00560.970.95 to 0.990.0203
Respiratory rate, bpm1.101.04 to 1.150.0002NA
Chronic renal insufficiencyNo1
Yes0.480.30 to 0.760.00160.240.14 to 0.43<0.0001
NT-proBNP, pg/mL1.001.00 to 1.000.0047NA
  • MCH, mean corpuscular haemoglobin; NA, not available; NT-proBNP, N-terminal pro-brain natriuretic peptide; PaCO2, partial pressure of carbon dioxide in the artery.