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Table 4 Prediction of simple weaning

From: Diaphragm thickening fraction to predict weaning—a prospective exploratory study

Diaphragm parameter Cutoff ROC of AUC (95% CI) Sensitivity (%) Specificity (%) p value
DTf, % NPT
 2 ≥ 25.5 0.91 (0.84–0.99) 97 81 < 0.001
 4 ≥ 26.5 0.93 (0.87–0.99) 87 75 < 0.001
 6 ≥ 25.5 0.91 (0.84–0.99) 90 88 < 0.001
 T-piece ≥ 24.5 0.90 (0.82–0.97) 87 75 < 0.001
AMP, inspiration, cm
 2 ≥ 1.21 0.87 (0.78–0.96) 87 75 < 0.001
 4 ≥ 1.27 0.81 (0.71–0.92) 81 81 < 0.001
 6 ≥ 1.24 0.77 (0.66–0.88) 84 59 < 0.001
 T-piece ≥ 1.20 0.76 (0.65–0.88) 72 55 < 0.001
SPcont, cm/s
 2 ≥ 1.24 0.94 (0.88–0.99) 84 91 < 0.001
 4 ≥ 1.27 0.94 (0.89–0.99) 93 78 < 0.001
 6 ≥ 1.24 0.89 (0.81–0.96) 78 71 < 0.001
 T-piece ≥ 1.23 0.86 (0.77–0.94) 87 68 < 0.001
  1. Abbreviations: ROC receiver operative characteristics, AUC area under curve, CI confidence interval, DTf diaphragm thickening fraction, AMP amplitude of diaphragm, SPcont speed of contraction of diaphragm