Table 2 Multivariable logistic regression model for ICU admission in the American cohort^a

Female

0.94 (0.89–0.99)

0.046

− 0.059

Age

 90 and above

 86–89

 83–85

 80–82

0.82 (0.75–0.89)

0.85 (0.79–0.92)

0.96 (0.88–1.04)

1

 < 0.001

 < 0.001

0.27

Reference

− 0.202

− 0.161

− 0.044

Reference

LAPS score

 38 and higher

 24–37

 15–23

 6–14

 0–5

14.65 (12.88–16.65)

3.43 (3.01–3.91)

2.03 (1.77–2.32)

1.35 (1.16–1.58)

1

 < 0.001

 < 0.001

 < 0.001

 < 0.001

Reference

2.684

1.234

0.707

0.304

Reference

Charlson comorbidity index

 7 and higher

 6

 0–5

0.92 (0.85–1.002)

0.86 (0.8–0.92)

1

0.05

 < 0.001

Reference

0.079−

− 0.151

Reference

Primary diagnosis^b

 Acute respiratory failure

21.61 (12.53–37.25)

 < 0.001

3.073

 Sepsis

4.87 (4.27–5.55)

 < 0.001

1.583

 Stroke and TIA

2.25 (1.91–2.64)

 < 0.001

0.81

 DVT PE

1.45 (1.11–1.91)

0.01

0.374

 Acute pancreatitis

0.88 (0.59–1.32)

0.55

− 0.123

 Pneumonia

0.85 (0.73–0.99)

0.03

− 0.165

 Cholecystitis/cholangitis

0.81 (0.6–1.11)

0.2

− 0.205

 Atrial fibrillation/flutter

0.73 (0.58–0.92)

0.01

− 0.313

 Heart failure

0.72 (0.64–0.81)

 < 0.001

− 0.332

 Femoral fracture

0.55 (0.45–0.66)

 < 0.001

− 0.602

 Dyspnea

0.21 (0.08–0.53)

 < 0.001

− 1.557

 Fever

0.17 (0.06–0.47)

 < 0.001

− 1.779

 UTI

0.17 (0.13–0.23)

 < 0.001

− 1.756

 Syncope

0.09 (0.04–0.18)

 < 0.001

− 2.403