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Distribution of gait digital mobility outcomes (DMOs) across Global Initiative for Chronic Obstructive Lung Disease (GOLD) grades 1–4. Shorter walking bouts (WBs) were 10–30 s. Longer WBs were >30 s. p-trends shown across COPD severity stages obtained from linear regression models with COPD severity stages as a continuous variable NA: not applicable. #: unadjusted; ¶: adjusted for age, sex, height, Functional Comorbidity Index and walking duration.
