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. 2021 Oct 14;11:20384. doi: 10.1038/s41598-021-99986-3

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Comparison with board-certified radiologist interpretations. (A) Heatmaps visualising inter-reader agreement for Normal, Abnormal, Pneumonia, and COVID-19 images. (B-E) Receiver Operating Characteristic (ROC) curves and (F-I) Precision-Recall (PR) curves demonstrating CovIx model performance on the first 100 images collected in June 2020 across EDs in NHS GG&C (n = 17 COVID-19 positive). Individual radiologist performance is visualised as “ + ”. Grey lines indicate 95% Confidence Intervals (CI) calculated on 2000 bootstrap samples.