Table 1.
Characteristics of Study Participants
| Characteristics | No Asthma (n = 2,510)* | Asthma (n = 171)* | P Value for Comparison | |
|---|---|---|---|---|
| Age, yr | 11.91 ± 0.09 | 11.78 ± 0.40 | 0.728 | |
| Male sex | 1,282 (50.29) | 108 (61.59) | 0.027 | |
| Race and ethnicity | 0.002 | |||
| Non-Hispanic white | 849 (61.35) | 44 (49.56) | ||
| Non-Hispanic black | 493 (11.54) | 64 (25.81) | ||
| Hispanic | 1,029 (20.10) | 48 (15.45) | ||
| Other | 139 (7.02) | 15 (6.88) | ||
| Annual household income < $20,000 | 482 (13.58) | 42 (19.17) | 0.084 | |
| Covered by health insurance | 2,184 (90.11) | 159 (95.60) | 0.029 | |
| Family history of asthma | 618 (23.68) | 103 (57.71) | <0.001 | |
| Environmental tobacco exposure | 353 (14.14) | 27 (15.43) | 0.701 | |
| FEV1, L† | 2.71 ± 0.03 | 2.58 ± 0.12 | 0.004 | |
| FVC, L† | 3.14 ± 0.04 | 3.13 ± 0.15 | 0.841 | |
| FEV1/FVC, % | 86.69 ± 0.16 | 82.46 ± 0.82 | <0.001 | |
| Fractional exhaled nitric oxide, ppb | 15.53 ± 0.45 | 30.19 ± 2.66 | <0.001 | |
| Body mass index, z score | 0.54 ± 0.03 | 0.85 ± 0.11 | 0.008 | |
| Percent body fat, z score | 0.16 ± 0.03 | 0.37 ± 0.08 | 0.024 | |
| Waist circumference, z score | −0.12 ± 0.03 | 0.08 ± 0.08 | 0.032 |
Results are shown as mean (SE) for continuous and N (%) for binary variables.
*
Numbers may vary because of missingness.
†
Adjusted for age, sex, height, and height squared.