Characteristics of asthmatic subjects
| Patient no. | Age (years) | Sex | FEV1(% pred) | PC20(mg/ml) | Atopy |
| 1 | 23 | F | 114.4 | 0.06 | HD, C, GP |
| 2 | 32 | F | 82.6 | 1.52 | C, GP, HD |
| 3 | 18 | F | 81.6 | 0.06 | C, HD, GP |
| 4 | 37 | M | 94.8 | 0.31 | HD |
| 5 | 18 | M | 97.4 | 0.54 | C, HD, GP, AF |
| 6 | 24 | M | 78.0 | 2.00 | GP |
| 7 | 23 | F | 90.0 | 1.69 | GP, C |
| 8 | 39 | F | 76.5 | 0.52 | GP |
| 9 | 26 | F | 102.7 | 0.97 | HD, C, GP |
| 10 | 26 | M | 88.4 | 0.16 | HD, GP |
| Mean | 26.6 | 90.6 | |||
| SE | 2.3 | 3.8 |
HD = house dust mite; GP = grass pollen; AF =Aspergillus fumigatus; C = cat; FEV1 = forced expiratory volume in one second; PC20 = dose of methacholine required to cause a 20% fall in FEV1.