Area under the curve (AUC0–40 forced expiratory volume in one second (FEV1)) values for the postmethacholine changes in FEV1 following salbutamol
| Target fall in FEV1 % | AUC0–40 FEV1 | Difference % | p‐value | |
| Salbutamol | Placebo | |||
| 0 | 30.25 (22.76–37.74) | 27.20 (19.58–34.82) | 11.2 | 1.0 |
| 15 | 25.72 (19.19–32.25) | 30.12 (23.57–36.67) | −14.6 | 0.602 |
| 30 | 20.37 (12.80–27.94) | 30.66 (23.90–38.42) | −35.7 | 0.0001 |