1 Age, lung function and bronchial responsiveness to methacholine and sodium metabisulphite(SMBS) in the patient and nine control subjects
| Subject No. | Age yrs | Sex | FEV1# % pred | FVC# % pred | PD20 µg | ΔFEV1% |
| Patient | 37 | F | ||||
| SMBS challenge 1 | 100.3 | 108.5 | 16 | −33.3 | ||
| SMBS challenge 2 | 96.6 | 107.3 | ND | −25.4 | ||
| Controls | ||||||
| 1 | 22 | F | 81.6 | 117.2 | 42 | −6.8 |
| 2 | 51 | M | 101.3 | 100.4 | 128 | −1.9 |
| 3 | 23 | M | 126.6 | 120.6 | 17 | −11.1 |
| 4 | 48 | F | 117.5 | 115.0 | 26 | −27.9 |
| 5 | 24 | F | 98.5 | 119.8 | 55 | −3.0 |
| 6 | 24 | F | 97.3 | 108.1 | 85 | −3.5 |
| 7 | 25 | F | 83.6 | 89.3 | 2 | −12.4 |
| 8 | 22 | F | 86.9 | 92.3 | 24 | 0.0 |
| 9 | 25 | F | 103.4 | 94.9 | 159 | −4.6 |
FEV1: forced expiratory volume in one second; % pred: % predicted; FVC: forced vital capacity; PD20: provocative dose of methacholine causing a 20% fall in FEV1; Δ FEV1 %: percentage change in FEV1 from baseline with SMBS; F: female; M: male; ND: not determined. #: baseline value on SMBS challenge day.