Table 2 Final multivariable model including BMI and predictors of 30 day mortality among those with CDI

Body mass index (BMI)

BMI < 20

0.62

0.35, 1.03

BMI 20–25

Reference

BMI 25–30

0.87

0.61, 1.24

BMI 30–35

0.83

0.52, 1.30

BMI 35–40

1.04

0.55, 1.87

BMI 40–45

0.94

0.35, 2.20

BMI > 45

0.97

0.38, 2.21

Age

Age 18–55

Reference

Age 56–75

1.55

1.03, 2.37

Age ≥ 76

2.17

1.36, 3.52

Comorbidities

Charlson comorbidity index 0–3 points

Reference

Charlson comorbidity index 4–6 points

2.05

1.37, 3.11

Charlson comorbidity index > 7 points

1.97

1.19, 3.29

ICU stay

1.74

1.27, 2.39

Lab values

Creatinine > 1.5 mg/dL

1.88

1.39, 2.56

Albumin < 3 g/dL

2.12

1.58, 2.87

WBC count > 15 × 10³/μL

1.77

1.30, 2.42

Platelet count < 156 × 10³/μL

1.69

1.24, 2.31

Total bilirubin > 1.3 mg/dL

2.01

1.43, 2.82

Vital signs

Heart rate > 100 beats/min

1.72

1.19, 2.51

MAP < 65 mmHg

1.39

1.00, 1.93