Characteristics of symptomatic and asymptomatic cases
| Symptomatic cases (n = 328) | Asymptomatic cases (n = 187) | |
|---|---|---|
| Figures are mean (SD) or percentage (number) as stated. | ||
| Symptomatic cases are those who reported wheeze within the previous 12 months. | ||
| BMI, body mass index; FEV1, forced expiratory volume in 1 second; ex-smokers, individuals who reported previously smoking >1 pack year; age diagnosed, reported age at which asthma started; asthma treatment, self-reported current use of medication for asthma. | ||
| †p⩽0.02, ‡p⩽0.001, difference between symptomatic and asymptomatic cases. | ||
| Men, % (n) | 34.8 (112) | 28.9 (54) |
| Mean (SD) age (years) | 58.4 (8.9) | 58.5 (8.3) |
| Mean (SD) BMI (kg/m2) | 26.3 (3.9) | 25.9 (3.6) |
| Ex-smokers, % (n) | 25.0 (82) | 22.6 (42) |
| Mean (SD) age diagnosed (years) | 32.9 (20.8) | 29.4 (21.7) |
| Asthma treatment, % (n) | 84.2 (276)‡ | 44.4 (83)‡ |
| Mean (SD) FEV1 (l) | 2.06 (0.72)† | 2.21 (0.63)† |