Basic demographic (N = 776)
Controls (390) Cases (386) Severity subgroups of asthma (N)
Mild intermittent (95) Mild persistent (235) Moderate persistent (56)
1. Gender (F) N (%) 127 (32.6) 122 (31.6) 28 (29.5) 73 (31.1) 21 (37.5)
2. Age (in years) M ± SD 22.9 ± 14.5 18.7 ± 15.9 18.3 ± 13.9 18.2 ± 15.8 21.3 ± 19.6
3. Weight (in kg) M ± SD 46.8 ± 22.9 36.5 ± 22.4 37.2 ± 21.1 36.4 ± 22.4 35.9 ± 24.6
4. Height (in cm) M ± SD 145.5 ± 28.9 133.3 ± 30.8 136.4 ± 29.3 132.4 ± 31.9 131.9 ± 28.5
5. BMI M ± SD 20.0 ± 5.4 18.3 ± 6.6 17.9 ± 4.7 18.5 ± 7.3 18.1 ± 6.5
6. Hospitalization for asthma N (%) NA 157 (40.7) 14 (14.7) 102 (43.4) 41 (73.2)
7. Family history of asthma N (%) NA 174 (45.1) 44 (46.3) 102 (43.4) 28 (50.0)
F = female; N = number; % = percentage; M ± SD = mean ± standard deviation.