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. 2020 Dec 21;7(1):e000770. doi: 10.1136/bmjresp-2020-000770

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

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(A) Diagnostic test accuracy (DTA) forest plot of R5. (B) DTA forest plot of maximal mid-expiratory flow. FN, false negative; FP, false positive; TN, true negative; TP, true positive.