Selected baseline characteristics of children who were included in the new-onset asthma and lung function analyses
| Children included in incident asthma analysis (n=1596) | Children included in LF analysis (n=2108) | |
| Age group | ||
| 7–9 years | 875 (54.8) | 1603 (76.0) |
| 10–11 years | 335 (21.0) | 505 (24.0) |
| >11 years | 386 (24.2) | – |
| Sex | ||
| Girls | 894 (56.0) | 1086 (51.5) |
| Boys | 702 (44.0) | 1022 (48.5) |
| Latino | 554 (34.7) | 710 (33.7) |
| Overweight | 395 (24.7) | 536 (26.5) |
| Family history of asthma | 222 (13.9) | 430 (21.7) |
| History of atopy* | 567 (35.5) | 916 (48.4) |
| History of asthma at study entry | 0 (0) | 310 (12.0) |
| Household ETS exposure | 186 (19.0) | 361 (17.9) |
| In utero exposure to smoking | 219 (13.7) | 354 (17.2) |
| Pests of any kind | 1195 (74.9) | 1627 (83.4) |
| Pets of any kind | 1302 (81.6) | 1728 (82.0) |
| Children with health insurance | 1313 (82.3) | 1781 (86.3) |
| Annual family income (in US dollars)† | ||
| ≤14 999 | 174 (10.9) | 263 (14.3) |
| 15 000–49 999 | 584 (36.6) | 768 (41.7) |
| ≥50 000 | 597 (37.4) | 812 (44.1) |
| Highest parental education level† | ||
| Less than high school | 210 (13.2) | 222 (10.9) |
| College | 1122 (70.3) | 1567 (74.3) |
| Graduate | 208 (13.0) | 242 (11.9) |