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. 2020 Oct 30;10(10):e037923. doi: 10.1136/bmjopen-2020-037923

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Hierarchical summary receiver operating characteristic curve for evaluating the prognostic value of mortality of Dyspnea, Eosinopenia, Consolidation, Acidemia and Atrial Fibrillation (DECAF) in acute exacerbation of chronic obstructive pulmonary disease (AECOPD). The HSROC, hierarchical summary receiver operating characteristic (HSROC) curve was conducted which plots sensitivity versus specificity. All studies were presented as a circle and plotted with the HSROC curve. The summary point (red box) indicates that the summary sensitivity was 0.76 and the summary specificity was 0.76. The summary results are displayed as the 95% confidence region and 95% prediction region in the HSROC curve plot. The size of the marker is scaled according to the total number of patients in each study.