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. 2022 Jul 6;19:14799731221114153. doi: 10.1177/14799731221114153

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© The Author(s) 2022

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 2. — Kaplan–Meier curves and a log-rank test. Kaplan–Meier survival curves stratified by relative decline in PEFR. The cutoff value was set at 8.65%. Patients with a relative decline in PEFR over 8.65% had significantly worse survival (p < .01, log-rank test). PEFR: peak expiratory flow rate.