TABLE 2.
BASELINE PHENOTYPIC CHARACTERISTICS OF INDEX CHILDREN IN CAMP AND COSTA RICA
| Variable | Costa Rica (n = 416) | CAMP (n = 498) |
|---|---|---|
| Age, y | 8.84 (7.79–10.48)* | 8.76 (7.08–10.56) |
| Female sex | 158 (38) | 189 (38) |
| Baseline post-bronchodilator FEV1, L | 1.74 (1.49–2.03) | 1.77 (1.49–2.11) |
| Baseline post-bronchodilator, FEV1/FVC | 86.07 (81.94–89.95) | 86.0 (82.0–90.0) |
| Airway responsiveness† | 1.2 (0.7–1.4) | 1.1 (0.5–2.8) |
| Disease exacerbation, ≥1‡ | 21 (5) | 352 (33) |
| High dust mite allergen exposure, (≥10 μg/g) | 203 (49) | 45 (9) |
*
Parenthetical values are median range (interquartile range) or count (percentage) reported.
†
Airway responsiveness: PD20 (μmol of methacholine) used in the Costa Rican study. PC20 (mg/ml of methacholine) used in the CAMP study.
‡
In Costa Rica, at least one hospitalization for asthma in the previous year. In CAMP, at least one emergency department visit or hospitalization for asthma in the year preceding randomization.