Demographic data of patients attending focus groups at the Royal Brompton and Glenfield Hospitals
| Age years | 63±8 |
| Females % | 50% |
| EBV as first-stage intervention % | 19% |
| Second intervention % | 31% |
| Time between diagnosis and functional limitation years | 9±7.5 |
| Time since first intervention years | 3.8±2.2 |
| Time between referral and initial appointment weeks | 28.5±64.6 |
| Time between initial appointment and procedure weeks | 38.9±34.7 |
| Time in hospital post-LVRS days | 14.3±8.9 |
| Time in hospital post-EBV days | 1.5±1.0 |
Data presented as mean±sd unless otherwise stated. EBV: endobronchial valves; LVRS: lung volume reduction surgery.