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Table 3 Comparison between diagnostic tests

From: Use of diaphragm thickening fraction combined with rapid shallow breathing index for predicting success of weaning from mechanical ventilator in medical patients

Diagnostic test

Sensitivity (%)

Specificity (%)

PPV (%)

NPV (%)

Accuracy (%)

RSBI ≤ 105

96.0

44.4

82.8

80.0

82.4

Right DTF ≥ 26%

96.0

67.7

88.9

85.7

88.2

Right DTF ≥ 26% and RSBI ≤ 105

92.0

77.8

92.0

77.8

88.2

  1. RSBI rapid shallow breathing index, DTF diaphragm thickening fraction, PPV positive predictive value, NPV negative predictive value