Prognostic value of gait speed for exacerbations and mortality in COPD.

ERJ Open Res · 2026 · PMC13202360 · PMID 42206019

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Quartile analysis revealed a significant trend in FEV 1 (%) over time, with Q4 consistently showing the highest values from baseline to year 3 (all p<0.05), whereas differences among Q1 to Q3 were not substantial ( figure 2b ).

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