Table. 1—

Characteristics of asthmatic patients and control subjects

Control subjectsMild-to-moderate asthmatic patientsSevere asthmatic patients
Subjects n435328
Age yrs, mean±sd46.7±10.846.8±13.646.5±11.9
Female24 (56)34 (64)20 (71)
BMI kg·m−225.0±0.725.3±0.830.1±1.6#
Total fat intake % of energy30.1±1.131.4±0.933.6±1.0*
Atopic**24 (56)47 (89)21 (75)
FEV1 % predicted102.1±2.087.7±2.267.4±4.1
Current smoker5 (11.6)1 (1.9)4 (14.3)
Taking vitamin supplements20 (46.5)25 (47.2)6 (21.4)
Socioeconomic status
 High29 (67)36 (68)10 (37)
 Middle6 (14)11 (21)10 (37)
 Low8 (19)6 (11)7 (26)
  • Data are presented as mean±sem, n or n (%) unless otherwise stated. BMI: body mass index; FEV1: forced expiratory volume in one second. *: p<0.05 compared with control subjects; **: p<0.01; #: p = 0.002 compared with control subjects and mild-to-moderate asthmatics; : p<0.05 by Chi-squared analysis. FEV1 differed significantly among the three groups, p<0.001.