Table 2 Univariate and multivariate logistic regression analyze variables screened by least absolute shrinkage and selection operator regression in the training set

Age (years old)

1.01

1.01 to 1.02

 < 0.001

1.01

1.00 to 1.02

0.013

Congestive heart failure

0.79

0.61 to 1.04

0.0928

NA

SAPS III

1.02

1.02 to 1.03

 < 0.0001

1.01

1.00 to 1.01

0.002

Heart rate (beats/minute)

1.03

1.02 to 1.03

 < 0.001

1.02

1.01 to 1.03

 < 0.001

MBP (mmHg)

0.97

0.96 to 0.98

 < 0.001

0.99

0.98 to 1.00

0.049

Respiratory rate (beats/minute)

1.13

1.09 to 1.16

 < 0.001

1.05

1.01 to 1.09

0.007

Temperature (°C)

0.72

0.64 to 0.80

 < 0.001

0.76

0.65 to 0.87

 < 0.001

SPO₂ (%)

0.86

0.82 to 0.90

 < 0.001

0.93

0.88 to 0.97

0.002

GCS

0.85

0.80 to 0.90

 < 0.001

0.86

0.80 to 0.91

 < 0.001

Man (n, %)

0.73

0.58 to 0.92

0.0084

0.76

0.57 to 1.00

0.048

Hemoglobin (g/dL)

0.89

0.85 to 0.94

 < 0.001

0.95

0.89 to 1.01

0.100

Anion gap (mmol/L)

1.14

1.11 to 1.18

 < 0.001

1.02

0.97 to 1.06

0.466

Bicarbonate (mmol/L)

0.89

0.86 to 0.91

 < 0.001

0.95

0.92 to 0.98

0.003

BUN (mg/dL)

1.02

1.01 to 1.02

 < 0.001

1.01

1.00 to 1.01

0.087

Sodium (mmol/L)

1.02

1.00 to 1.04

0.0702

NA

PT (s)

1.05

1.03 to 1.07

 < 0.001

1.01

1.00 to 1.03

0.049

Lactate (mmol/L)

1.25

1.19 to 1.31

 < 0.001

1.06

0.99 to 1.13

0.103