Table 1

 Characteristics of patients with asthma and control subjects

Control subjects(n = 25)Patients with asthma
Stable(n = 24)Exacerbation(n = 28)
*Data are presented as mean (SE).
†p<0.001 compared with patients with stable asthma.
M/F14/1112/1213/15
Age (years)*38.1 (5.1)39.2 (5.4)42.2 (4.9)
Asthma duration (years)*11.2 (2.7)9.8 (2.3)
Atopic/non-atopic0/2517/719/9
FEV1 (% predicted)*92.9 (1.8)54.0 (2.0)†
Pao2 (kPa)*11.7 (0.1)9.3 (0.3)†
Paco2 (kPa)*5.3 (0.1)4.4 (0.1)†