Responder rates at 6 and 12 months
| Variable | MCID | 6 months (%) | 12 months (%) |
|---|---|---|---|
| FEV1 | ≥12%11 | 48.0 | 40.6 |
| RV | ≥0.3512 | 64.8 | 57.6 |
| 6MWD | ≥26 m13 | 52.8 | 60.0 |
| SGRQ | ≥4 points14 | 74.1 | 65.6 |
| SGRQ | ≥8 points | 61.1 | 53.1 |
Responder rates at 6 and 12 months after bilateral lung volume reduction coil treatment using minimal clinically important differences (MCID) for forced expiratory volume in 1 s (FEV1), residual volume (RV), 6-min walking distance (6MWD) and the St George's Respiratory Questionnaire total score (SGRQ). Results are given as percentage of responders to total patients.