Characteristics of patients frequently admitted with asthma to University Hospital Southampton Foundation Trust from 2010 to 2012

201020112012Total cohort#
Patients n36363184
Age years44.6±15.641.3±18.544.2±17.842.7±16.9
FEV1 L2.06 (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/FVC71.25 (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 comorbidity69.455.658.155
Dysfunctional breathing33.338.954.841.7
Allergic rhinitis44.45041.940
Salicylate sensitivity30.633.325.825
Vocal cord dysfunction13.927.82917.9
Asthma–COPD overlap13.919.49.7%14.3
BMI kg·m−2 mean31.6 (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.