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Changes from t1 to t2 in walking distance without (A) and with adjustments (B,C) for baseline values. Figure 1A: no adjustments, COPD group: p = 0.636 (part. Eta2 = 0.003); Figure 1B: with covariate (6MWTt1); covariate: p = 0.000 *** (part. Eta2 = 0.098), COPD group: p = 0.035 * (part. Eta2 = 0.015); Figure 1C: T2D, COPD group: p = 0.000 *** (part. Eta2 = 0.081); Significance level: * p < 0.05, ** p < 0.01, *** p < 0.001.
