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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

From: Diaphragm function and weaning from mechanical ventilation: an ultrasound and phrenic nerve stimulation clinical study

  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)
  1. CI confidence interval