Estimates of smallest worthwhile effects of pulmonary rehabilitation in people with chronic obstructive pulmonary disease
| Percentile | Smallest worthwhile effect on 6MWD m | |
| Land-based | Water-based | |
| 80% | 64 (50–80) | 72 (51–100) |
| 50% | 20 (15–37) | 26 (15–33) |
| 20% | 4 (3–6) | 4 (4–7) |
Data are presented as mean (95% CI). 6MWD: 6-min walk distance.