| Method used | 6MWD m | MCEC W |
| Anchor-based | ||
| SGRQ total score# | 24.6 (23.4–25.7) | 3.3 (3.0–3.5) |
| SGRQ impact# | 18.9 (18.1–20.1) | 2.2 (2.0–2.4) |
| SGRQ activities# | 24.2 (23.4–25.4) | 3.2 (3.0–3.4) |
| SOBQ total score¶ | 26.4 (25.4–27.4) | 3.2 (3.0 –3.4) |
| Distribution-based | ||
| sem | 30.6 | |
| Cohen's effect size | 26.8 | 5.5 |
| Empirical rule effect size | 25.7 | 5.3 |
Data are presented as MID (95% CI) or MID. All regression equations multiplied by -1 to facilitate interpretation (improvements of St George's Respiratory Questionnaire (SGRQ) and University of California San Diego Shortness of Breath Questionnaire (SOBQ) if change score is negative). sem: standard error of measurement. #: MID 4 points; ¶: MID 5 points.