Table 2 Threshold, area under the receiver operating characteristics curves (AUC-ROC), sensitivity, specificity, positive and negative likelihood ratios and positive and negative predictive values of endotracheal pressure induced by a bilateral phrenic nerve stimulation (Ptr,stim) and diaphragm thickening fraction (TFdi) to predict weaning failure from mechanical ventilation
Threshold | AUC-ROC (95% CI) | Sensitivity (%) (95% CI) | Specificity (%) (95% CI) | Likelihood ratios (95% CI) | Predictive values (%) (95% CI) | |||
|---|---|---|---|---|---|---|---|---|
Positive | Negative | Positive | Negative | |||||
Ptr,stim | 7.2 cmH2O | 0.80 (0.70–0.89) | 68 (47–84) | 79 (64–89) | 3.2 (1.7–5.8) | 0.4 (0.2–0.7) | 66 (51–78) | 80 (70–88) |
TFdi | 25.8% | 0.82 (0.73–0.93) | 79 (59–92) | 73 (58–85) | 2.9 (1.8–4.8) | 0.3 (0.1–0.6) | 63 (51–74) | 85 (74–92) |