Table 4 Variables associated with failure of prolonged weaning and failure of spontaneous breathing trial—results of binary logistic regression model

Gender (male)

0.532 (0.291–0.973)

0.040

0.401 (0.216–0.745)

0.004

Obesity (BMI > 30 kg/m²)

2.595 (1.210–5.562)

0.014

–

n.s.

COPD

3.209 (1.563–6.589)

0.002

–

n.s.

LTC-MP

3.470 (1.067–11.284)

0.039

3.017 (1.027–8.862)

0.046

P_aCO₂ on MV

1.101 (1.034–1.173)

0.003

1.157 (1.083–1.235)

< 0.001

Failed first SBT

4.702 (2.250–9.825)

< 0.001

–

n.a.