Table 3: Accuracy of detecting proper position of endotracheal tube (ETT) by ultrasonography in comparison with chest radiograph.
CI: confidence interval.
Statistic Value 95% CI
Sensitivity 91.67% 80.02% to 97.68%
Specificity 83.33% 58.58% to 96.42%
Positive Predictive Value 93.62% 82.46% to 98.66%
Negative Predictive Value 78.95% 54.43% to 93.95%
Positive Likelihood Ratio 5.50 1.95 to 15.51
Negative Likelihood Ratio 0.10 0.04 to 0.26