Table 1.
—Patient characteristics.
| Age (years) (n = 136) | Mean (SD) | 41.26 (14.522) |
| Median (range) | 42.82 (12.1–83.6) | |
| Age distribution (n = 136) | 12–18 years | 9 (6.6%) |
| 18–45 years | 69 (50.7%) | |
| >45 years | 58 (42.6%) | |
| Sex (n = 136) | Male | 43 (31.6%) |
| Female | 93 (68.4%) | |
| Smoking history (n = 136) | Current smoker | 3 (2.2%) |
| Ex-smoker | 24 (17.6%) | |
| Never smoked | 89 (65.4%) | |
| Not recorded | 20 (14.7%) | |
| Pack-years (n = 16) | Mean (SD) | 10.76 (14.378) |
| Median (range) | 7.50 (0.2-60.0) | |
| Last recorded weight pre-OMB (kg) (n = 132) | Mean (SD) | 81.16 (20.632) |
| Median (range) | 81.25 (40.3–133.0) | |
| Age at asthma diagnosis (years) (n = 120) | Mean (SD) | 14.59 (15.657) |
| Median (range) | 8.00 (0–72.0) | |
| Duration of severe persistent allergic asthma (years) (n = 120) | Mean (SD) | 26.44 (14.266) |
| Median (range) | 25.80 (2.9–57.5) | |
| Allergies pre-dating OMB initiation (n = 136) | Allergen | No. patients (%) |
| Animal fur (inc. cats, dogs) | 79 (58.1%) | |
| Pollen | 64 (47.1%) | |
| House dust (mite) | 62 (45.6%) | |
| Plant material | 32 (23.5%) | |
| Fruit (inc. strawberries) | 14 (10.3%) | |
| Antibiotic | 13 (9.6%) | |
| Other drug | 11 (8.1%) | |
| Nuts (inc. peanut) | 11 (8.1%) | |
| Moulds | 9 (6.6%) | |
| Milk | 6 (4.4%) | |
| Fish/shellfish | 6 (4.4%) | |
| Egg | 5 (3.7%) | |
| Feathers | 2 (1.5%) | |
| Other | 36 (26.5%) | |
| None | 8 (5.9%) |