TABLE 3.

Asthma at Three Years of Age: Univariate Logistic Regression (N = 8071)

OR (95% CI)P Value
Vitamin drops in first 3 mo1.07 (0.92–1.24).393
Vitamin drops in first 6 mo1.13 (0.98–1.30).108
Vitamins at 3 years of age0.86 (0.75–1.00).049
Gender
 Male1.00
 Female0.62 (0.54–0.72)<.001
Presence of smoking in household1.55 (1.33–1.80)<.001
Increasing level of maternal education0.95 (0.92–0.98)<.001
Increasing level of household income0.84 (0.80–0.89)<.001
Enrollment in child care1.40 (1.20–1.62)<.001
Breastfeeding0.61 (0.52–0.71)<.001
Prematurity
 Full term1.00<.001
 35–36 wk1.20 (0.92–1.58).187
 32–34 wk1.41 (1.04–1.92).028
 28–31 wk2.59 (2.04–3.30)<.001
 ≤27 wk3.23 (2.42–4.33)<.001
Race
 White1.00
 Black1.79 (1.54–2.08)<.001
 Other1.05 (0.67–1.69).831