期刊
PEDIATRIC ALLERGY AND IMMUNOLOGY
卷 25, 期 1, 页码 30-35出版社
WILEY
DOI: 10.1111/pai.12167
关键词
atopic dermatitis; atopy; children; eczema; severity; vitamin D
资金
- Hong Kong Research Grants Council [469908, 470909]
- Research Committee Group Research Scheme [3110087]
- Chinese University of Hong Kong [2011.1.058]
BackgroundRecent studies implicated the importance of vitamin D in innate immune defense and pathogenesis of allergic diseases. However, the impact of vitamin D deficiency on atopic dermatitis (AD) diagnosis and severity remains unclear. This case-control study investigated such relationship in Hong Kong Chinese children. MethodsSerum 25-hydroxyvitamin D [25(OH)D] levels of 498 AD children and 328 non-allergic controls were measured by immunoassay. Subjects were categorized into deficient (<25nm), insufficient (25-49.9nm), and sufficient (50nm) groups. Short-term and long-term AD severity was evaluated by physician-diagnosed SCORing Atopic Dermatitis (SCORAD) and Nottingham Eczema Severity Score (NESS), respectively. Atopy biomarkers were also measured for analysis. ResultsThe mean (s.d.) serum 25(OH)D levels in AD patients and controls were 28.9 (15.3) and 34.2 (14.5) nm, respectively (p<0.001). More patients had serum 25(OH)D levels <25nm than controls (47.8% vs. 26.6%). AD severity as indicated by both SCORAD and NESS showed inverse associations with serum 25(OH)D levels (respective p=3.6x10(-4) and 0.004 when adjusted for age, sex, month of assessment, and immunoassay batch as covariates). Vitamin D-deficient patients (3.080.76) had higher logarithm-transformed total IgE than those with insufficient (2.740.69) and sufficient (2.72 +/- 0.72) serum 25(OH)D levels (p<0.001). The proportion of subjects with elevated IgE was higher in vitamin D-deficient (43.2%) than vitamin D-sufficient (20.0%) groups. ConclusionsVitamin D deficiency and insufficiency are prevalent in Hong Kong Chinese children. Vitamin D deficiency is associated with childhood AD and high total IgE. Serum 25(OH)D levels correlate inversely with both long- and short-term AD severity.
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