Characteristics of patients frequently admitted with asthma to University Hospital Southampton Foundation Trust from 2010 to 2012
| 2010 | 2011 | 2012 | Total cohort# | |
| Patients n | 36 | 36 | 31 | 84 |
| Female | 72 | 83 | 81 | 80 |
| Age years | 44.6±15.6 | 41.3±18.5 | 44.2±17.8 | 42.7±16.9 |
| FEV1 L | 2.06 (0.64–4.4) | 1.8 (0.87–3.53) | 2.21 (0.99–3.46) | 2.04 (0.64–4.4) |
| FEV1 % | 68.74 (26–111) | 62.13 (47–111) | 83.65 (46–109) | 68.16 (26–111) |
| FEV1/FVC | 71.25 (34–96) | 69.21 (32–96) | 72.15 (27–91) | 70.9 (27–96) |
| Exhaled nitric oxide¶ ppb mean (range) | 18.7 (3–76) (n=17) | 21.06 (1–76) (n=15) | 13.4 (2.33–34.33) (n=20) | 17.1 (1–76) (n=41) |
| Psychological comorbidity | 69.4 | 55.6 | 58.1 | 55 |
| GORD | 50 | 44.4 | 54.8 | 46.4 |
| Dysfunctional breathing | 33.3 | 38.9 | 54.8 | 41.7 |
| Allergic rhinitis | 44.4 | 50 | 41.9 | 40 |
| Salicylate sensitivity | 30.6 | 33.3 | 25.8 | 25 |
| Vocal cord dysfunction | 13.9 | 27.8 | 29 | 17.9 |
| Asthma–COPD overlap | 13.9 | 19.4 | 9.7% | 14.3 |
| Bronchiectasis | 8.3 | 11.1 | 3.2 | 6 |
| ABPA | 2.8 | 2.8 | 3.2 | 2.4 |
| BMI¶ kg·m−2 mean | 31.6 (n=34) | 31.2 (n=32) | 32.2 (n=30) | 31 (n=77) |
Data are presented as %, mean±sd or mean (range), unless otherwise stated. FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; GORD: gastro-oesophageal reflux disease; COPD: chronic obstructive pulmonary disease; ABPA: allergic bronchopulmonary aspergillosis; BMI: body mass index. #: excludes patients who were admitted in multiple years; ¶: data not available for some patients.