Fig. 2
From: Sustaining training effects through physical activity coaching (STEP): a randomized controlled trial
Flow diagram of STEP trial. Numbers refer to the total number of patients evaluated at each timepoint, independently of obtaining valid physical activity measures. PR, pulmonary rehabilitation program; COPD, Chronic Obstructive Pulmonary Disease; m, months; V, visit. Each visit (i.e. V-1, V0, V1, V2, V3) has an interval of 3 months in between