Results for cardiopulmonary exercise testing (CPET) parameters with two different normative reference values (NRV) applied
| CPET variables | Norfolk and Norwich Hospital (Dec 2018) | Royal Papworth Hospital (Dec 2019) | ||||
| Results (absolute) | Bongers 8–18 years (2014) % pred | Cooper 6–17 years (1984) % pred | Results (absolute) | Bongers 8–18 years (2014) % pred | Cooper 6–17 years (1984) % pred | |
| Load W | 89 | 42% | 62% | 98 | 46% | 71% |
| V′O2peak mL·min | 1391 | 55% | 70% | 1393 | 55% | 73% |
| V′O2peak mL·min ·kg | 23.5 | 56% | 70% | 24.5 | 59% | 73% |
| V′O2@ AT mL·min | 879 | 788 | ||||
| O2pulse mL | 8.9 | 68% | 96% | 8.1 | 62% | 90% |
| V′E/V′CO2slope | 45 | 52 | ||||
| V′EEqCO2 AT | 44 | 42 | ||||
| Lowest oxygen saturation % | 85 | 88 | ||||
| Cardiovascular slope | Normal | Normal | ||||
| Ratio (%) | Ratio (%) | |||||
| AT % pred V′O2max | 35% | 44% | 31% | 41% | ||
V′O2peak: peak oxygen consumption; V′O2 @ AT: oxygen consumption at anaerobic capacity; V′EEqCO2 at AT: ventilatory equivalents for carbon dioxide at anaerobic threshold; AT % pred V′O2max: anaerobic capacity as a per cent of maximal predicted oxygen consumption. V′E/V′CO2 slope: The slope of the relationship between ventilation and carbon dioxide production.