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. 2018 Oct 8;13:3131–3139. doi: 10.2147/COPD.S171134

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© 2018 Crimi et al. This work is published and licensed by Dove Medical Press Limited

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Difference in ΔLzapp% between patients with a minimal clinically significant difference for 6MWD after PR.

Notes: Box plots illustrating the change (%) of Lzapp at FRC between patients who “slightly improved” (who performed a 6MWD of <54 m) or “markedly improved” (who performed a 6MWD of >54 m) at the 6MWT after PR, *P<0.05 (Mann–Whitney U-test). The red line represents the ΔLzapp% cutoff value determined by the receiver operating characteristic (ROC) curve analysis showed in Figure 4.

Abbreviations: Lzapp, length of diaphragm zone of apposition; FRC, functional residual capacity; 6MWD, 6-minute walking distance; 6MWT, 6-minute walking test; PR, pulmonary rehabilitation.