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Table 4 Predictive accuracy of potential variables for weaning outcome

From: Application of bedside ultrasound in predicting the outcome of weaning from mechanical ventilation in elderly patients

Variables AUC 95% CI Cut-off point Sensitivity (%) Specificity (%)
RSBI 0.680 0.581–0.767 102 65 53
LUS 0.764 0.671–0.842 11 71 55
DE 0.831 0.690–0.856 1.4 85 62
DTF 0.881 0.790–0.956 30 94 84
Combined model 0.919 0.850–0.963 0.23 96 89
  1. Combined model: RSBI + LUS + DE + DTF; AUC area under curve, DE diaphragmatic excursion, DTF diaphragm thickening fraction, RSBI rapid shallow breathing index, LUS lung ultrasound score