Table 3 Accuracy of echocardiography and lung and diaphragm ultrasound variables during the SBT for predicting weaning failure
Variables | Threshold | AUC (95% CI) | p value | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) |
|---|---|---|---|---|---|---|---|
SBT Global LUS score | 14 | 0.719 (0.564–0.875) | 0.014 | 86.7 | 61.1 | 48.1 | 91.7 |
SBT Anterior LUS score | 4 | 0.689 (0.529–0.849) | 0.035 | 66.7 | 75 | 52.6 | 84.4 |
SBT Antero-lateral LUS score | 7 | 0.721 (0.545–0.897) | 0.014 | 73.3 | 75 | 55 | 87.1 |
DTF | 31 | 0.678 (0.532–0.823) | 0.047 | 100 | 41.7 | 41.7 | 100 |
SBT E/A | 0.54 | 0.528 (0.322–0.733) | 0.757 | 26.7 | 97.2 | 80 | 76.1 |
SBT Septal E/e’ | 10.3 | 0.534 (0.358–0.711) | 0.702 | 66.7 | 47.2 | 34.5 | 77.3 |
SBT Lateral E/e’ | 6.9 | 0.504 (0.321–0.687) | 0.967 | 80 | 36.1 | 34.3 | 81.2 |
SBT Average E/e’ | 8.8 | 0.503 (0.326–0.68) | 0.975 | 66.7 | 50 | 35.7 | 78.3 |
SBT LVEF | 50 | 0.542 (0.379–0.705) | 0.642 | 100 | 13.9 | 32.6 | 100 |