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Table 4 Accuracy of different variables in predicting weaning failure

From: Thoracic fluid content: a novel parameter for predicting failed weaning from mechanical ventilation

Parameter

AUC (95% CI)

Sensitivity

Specificity

PPV

NPV

Cutoff value

TFC

0.69(0.57–0.80)*

65.2%

75.6%

60.0%

79.5%

> 50 kΩ−1

Serum HCO3

0.60 (0.47–0.72)

56.5%

68.3%

50.0%

73.7%

> 25 mmol.L−1

P/F ratio

0.64 (0.50–0.76)

90.0%

37.5%

41.9%

88.2%

≤ 397.5

RSBI

0.51 (0.38–0.65)

36.8%

72.5%

38.9%

70.7%

> 51.1

Age

0.65 (0.52–0.76)*

82.6%

43.9%

45.2%

81.8%

> 39 years

  1. AUC area under curve, CI confidence interval, TFC thoracic fluid content, P/F ratio PaO2/fraction of inspired oxygen, RSBI rapid shallow breathing index, PPV positive predictive value, NPV negative predictive value
  2. *Denotes statistical significance