FIG. 2.

Multivariate analysis of asthma exacerbation by dietary pattern and vitamin D status. All models were compared with children with healthy diet without vitamin D insufficiency (reference group) and adjusted for age, sex, annual household income, parental history of asthma, BMI z-score, breastfeeding, outdoor physical activity, and early life exposure to second-hand smoke. Dietary pattern: healthy diet (dietary score ≥1) as compared with unhealthy diet (dietary score ≤0). *P < 0.05; **P < 0.01. BMI, body mass index.