Table 2.
—Risk Factors for Asthma Exacerbations in Costa Rica Exploratory Set
| Risk Factor | Unadjusted | Model 1 | Model 2 |
| Four or more physician visitsa for asthma in previous year | 14.7 (7.8-27.6)b | 6.8 (3.3-13.9)b | 6.4 (3.1-13.1)b |
| Number of oral steroid courses in the previous year | 6.0 (4.0-9.0)b | 4.1 (2.6-6.5)b | 4.1 (2.6-6.5)b |
| Paternal history of hay fever | 1.8 (1.1-3.0)c | 1.9 (1.02-3.7)c | 1.9 (1.02-3.7)c |
| Symptoms for ≥ 3 mo/y | 4.0 (2.6-6.1)b | 1.9 (1.1-3.3)c | 1.9 (1.1-3.2)c |
| Total serum IgE level, IU/mLd | 1.3 (0.98-1.8) | 1.5 (1.03-2.3)c | … |
| Eosinophil count, cells/mm3d | 2.8 (1.6-5.0)b | … | 2.7 (1.2-5.7)c |
| FEV1 % change postbronchodilatore | 1.03 (1.01-1.1)c | ns | ns |
| Antiinflammatory medicationse | 1.9 (1.3-3.0)b | ns | ns |
| C statistic | … | 0.87 | 0.88 |
| Goodness of fit | … | 0.92 | 0.84 |
Data are presented as OR (95% CI), unless otherwise indicated. ns = not significant. Each model included all variables listed in the respective column; both models also was adjusted for age, sex, and parental education level.
a
Nonacute visits.
b
P < .001.
c
P < .05.
d
Analyzed as log10.
e
Not statistically significant but included as confounders.