Table 2

Final multivariable logistic regression model

VariableBeta coefficientSEOR95% CIP value
LowerUpper
Vital signs and ECG parameters
SpO2 < 92%0.58350.08361.791.522.11<0.0001
Ventricular rate >120 bpm0.66550.17651.961.382.750.0002
QTc >5000.34640.15121.411.051.900.022
Demographics
Male versus female0.29850.08511.351.141.600.0005
Asian versus white0.27130.1451.310.991.740.0614
Black versus white−0.2820.11040.760.610.940.0106
Other/multiracial versus white0.00310.10331.000.821.290.9764
Unknown versus white−0.17410.19270.840.581.270.3662
Age (years)
45– <55 versus 18– <450.5870.22391.801.162.790.0087
55– <65 versus 18– <450.8920.2072.441.633.67<0.0001
65– <75 versus 18– <451.23990.20593.462.315.17<0.0001
75– <85 versus 18– <451.6430.21135.173.427.82<0.0001
85+ versus 18– <451.92640.2286.874.3910.73<0.0001
Laboratory values
Magnesium, not performed versus normal (1.6–2.6 mg/dL)−0.41660.09960.660.540.80<0.0001
Hypermagnesaemia (>2.6 mg/dL) versus normal (1.6–2.6 mg/dL)0.2830.13161.331.021.710.0315
AST >40 U/L versus normal (10–40 U/L)0.4210.08771.521.281.81<0.0001
Hyponatraemia (<135 mmol/L) versus normal (135–145 mmol/L)−0.06070.08550.940.801.110.4779
Hypernatraemia (>145 mmol/L) versus normal (135–145 mmol/L)0.70730.16142.031.482.78<0.0001
Hypokalaemia (<3.5 mmol/L) versus normal (3.5–5.3 mmol/L)−0.23830.13020.790.6111.020.0671
Hyperkaleamia (>5.3 mmol/L) versus normal (3.5–5.3 mmol/L)0.40650.15421.501.112.030.0084
BUN >23 mg/dL vs Normal (5–23 mmol/L)0.68290.10921.981.602.45<0.0001
Creatinine >1.3 mg/dL versus normal (0.50–1.30 mg/dL)0.30110.10751.351.101.670.0051
Lactate, not performed versus normal (0.5–2.0 mmol/L)0.78180.22582.191.403.400.0005
Lactate >2.0 mmol/L versus normal (0.5–2.0 mmol/L)1.24430.21953.472.265.34<0.0001
Hyperglycaemic (>99 mg/dL) versus normal (70–99 mg/dL)0.28240.12961.371.031.710.0293
Past medical history
CAD0.1920.08881.221.021.440.0307
COPD0.470.15721.601.182.180.0028
CHF0.56010.13821.751.342.27<0.0001
  • AST, aspartate aminotransferase; BUN, blood urea nitrogen; CAD, coronary artery disease; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; QTc, QT corrected for heart rate; SpO2, oxygen saturation.