COVID-19 Research Paper Volume 12, Issue 20 pp 19938—19944
An improved multivariate model that distinguishes COVID-19 from seasonal flu and other respiratory diseases
Figure 4. The performance of the developed integrated model evaluated by ROC curve in the external validation cohort. (A) ROC curve; (B) The cross-validation with the permutation test (1000 times). ROC curve: Receiver operator characteristic curve.