Details of outcome measures
| Outcome measure test | Equipment used (manufacturer) | Guideline or protocol followed |
| Spirometry | MicroLab hand held spirometer (Carefusion UK, Basingstoke, UK) | Joint European Respiratory Society/American Thoracic Society guidelines11 |
| Impulse oscillometry (IOS) | Jaeger IOS (Jaeger, Wurzburg, Germany) | Royal Brompton and Harefield NHS Foundation Trust standard operating procedure described by Paredi et al24 |
| Multiple breath nitrogen washout | Ecomedics Exhalyzer D machine (Eco Medics AG, Duernten, Switzerland) | Ecomedics Exhalyzer D standard operating procedure.45 |
| Electronic impedance tomography | Draeger Pulmovista 500 (Draeger Medical U.K. Limited, Hemel Hempstead, UK) | Pulmovista 500 operator guidance (Draeger Medical, Germany) |