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. 2021 Sep 14;12:730857. doi: 10.3389/fphys.2021.730857

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Copyright © 2021 Pierrakos, Smit, Pisani, Paulus, Schultz, Constantin, Chiumello, Mojoli, Mongodi and Bos.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Receiver operating characteristic curves for the LUS methods and the anterior LUS score in predicting non-focal lung morphology. ROC curves for the Piedmont, Amsterdam, and Lombardy method and for the anterior LUS score regarding classification of non-focal lung morphology when applied to both the Amsterdam and Lombardy cohort. The area under the ROC curve was: 0.83 for the Piedmont method, 0.92 for the Amsterdam method, 0.86 for the Lombardy method, and 0.90 for the anterior LUS score. As the output of the LUS methods for lung morphology classification is dichotomous, only one cut-off can be presented for the corresponding ROC curves. LUS, lung ultrasound; ROC, receiver operating characteristic.