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Table 3 Diagnostic performance of flow index to detect low inspiratory effort using the cutoff value derived from the previous studya

From: Validation of the flow index to detect low inspiratory effort during pressure support ventilation

Definition

Sensitivity

Specificity

PPV

NPV

Accuracy

WOB

1.00 (0.94–1.00)

0.42 (0.26–0.59)

0.74 (0.68–0.79)

1.00 (1.00–1.00)

0.78 (0.69–0.86)

PTPes per minute

1.00 (0.93–1.00)

0.33 (0.20–0.48)

0.61 (0.56–0.65)

1.00 (1.00–1.00)

0.67 (0.57–0.76)

Pmus

1.00 (0.94–1.00)

0.36 (0.22–0.51)

0.65 (0.60–0.70)

1.00 (1.00–1.00)

0.71 (0.61–0.80)

  1. aThe cutoff value of flow index derived from the previous study was 2.6 [14]
  2. Between parentheses is the 95% confidence interval (95% CI)
  3. NPV negative predictive values, Pmus inspiratory muscle pressure, PPV positive predictive values, PTPes esophageal pressure–time product, WOB work of breathing