Table 4.
Estimates of the minimum important difference for the Borg dyspnea scale
| Method | MID for Entire Cohort (n = 129) | MID for Treatment Naive (n = 45) | MID for IPAH (n = 62) | MID for CTD-PAH (n = 57) |
|---|---|---|---|---|
| Anchor | 0.36 | 0.42 | 0.33 | 0.42 |
| ES | 0.70 | 0.91 | 0.71 | 0.61 |
| SRM | 0.98 | 1.24 | 1.12 | 0.93 |
| SEMeas | 0.96 | 1.46 | 1.20 | 1.45 |
| 0.5 (SD) | 1.24 | 0.97 | 0.93 | 1.14 |
Definition of abbreviations: CTD-PAH = connective tissue disease–associated pulmonary arterial hypertension; ES = effect size; IPAH = idiopathic pulmonary hypertension; MID = minimum important difference; SEMeas = SE of the measurement; SRM = standard response mean.