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Table 2 Bedside upper airway sonography characteristics for intubation confirmation

From: A feasibility study on bedside upper airway ultrasonography compared to waveform capnography for verifying endotracheal tube location after intubation

  Value 95% Confidence interval
   Lower limit Upper limit
Sensitivity, % 98% 93% 99.8%
Specificity, % 100% 54.1% 100%
Positive predictive value 100% 96.3% 100%
Negative predictive value 75% 34.9% 96.8%
Likelihood ratio (+) Infinity - -
Likelihood ration (−) 0.0198 0.005 0.0781