FIGURE 5.

Efficacy of Urban Training intervention on steps per day (primary outcome) at 12 months in chronic obstructive pulmonary disease (COPD) patients according to subgroups based on baseline characteristics. Data are presented as adjusted difference (95% CI) at 12 months between intervention and usual-care groups. Subgroups defined by baseline airflow limitation stages (mild to moderate versus severe to very severe), functional exercise capacity (median 6-min walking distance (6MWD) <500 versus ≥500 m), comorbidity (Charlson index <2 versus ≥2) and physical activity levels (baseline <7100 versus ≥7100 steps per day, cut-off equivalent to being adherent to physical activity recommendations for older adults) [30].