Association between vitamin D status at 3 years and eosinophilic asthma in 6-year-old children with a history of severe bronchiolitis.

Doumat, George; El Zein, Joumane; Mehta, Geneva D; Zhu, Zhaozhong; Espinola, Janice A; Sullivan, Ashley F; Hasegawa, Kohei; Camargo, Carlos A · Thorax · 2025

prospective_cohort · Level II

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Abstract

The association between early childhood serum 25-hydroxyvitamin D (25(OH)D) and eosinophilic asthma remains unclear. We investigated this association using multicentre prospective data from 584 children with a history of bronchiolitis requiring hospitalisation (high-risk population). Low serum 25(OH)D levels (<20 ng/mL) were associated with increased odds of developing eosinophilic asthma (adjusted OR 2.33; 95% CI 1.23, 4.40; p=0.01) as compared with children with serum 25(OH)D of 20-39.9 ng/mL. Our data facilitate further investigation into the potential role of early-life vitamin D supplementation among children with a history of severe bronchiolitis and eosinophilia for preventing childhood asthma.

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