Table 2

The performance of CXR-FxNet on each test set

High sensitivity cut-offHigh specificity cut-off
Independent test setExternal test setIndependent test setExternal test set
Accuracy %, (95% CI)0.833 (0.786 to 0.874)0.742 (0.676 to 0.802)0.843 (0.797 to 0.883)0.808 (0.746 to 0.860)
Sensitivity %, (95% CI)0.875 (0.812 to 0.923)0.889 (0.810 to 0.943)0.717 (0.638 to 0.787)0.707 (0.607 to 0.794)
Specificity %, (95% CI)0.791 (0.716 to 0.853)0.596 (0.493 to 0.693)0.973 (0.932 to 0.993)0.909 (0.834 to 0.958)
Precision %, (95% CI)0.811 (0.743 to 0.868)0.688 (0.600 to 0.766)0.965 (0.912 to 0.990)0.886 (0.795 to 0.947)
NPV %, (95% CI)0.860 (0.790 to 0.914)0.843 (0.736 to 0.919)0.770 (0.703 to 0.828)0.756 (0.669 to 0.830)
  • CI, Confidence interval; CXR, chest X-ray; NPV, negative predictive value.