Publication: Prenatal vitamin D status and respiratory and allergic outcomes in childhood: A meta-analysis of observational studies
Authors
Pacheco-González, Rosa M. ; Garcia-Marcos, Luis ; Morales, Eva
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Publisher
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DOI
10.1111/pai.12876
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info:eu-repo/semantics/article
Description
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Abstract
Background: Prenatal vitamin D status may influence offspring’s respiratory and allergic outcomes; however, evidence is inconclusive. A systematic review and metaanalysis were conducted on the association between 25-hydroxyvitamin D [25(OH)
D] levels in maternal blood in pregnancy or cord blood at birth with the risk of offspring’s respiratory and allergic conditions.
Methods: Two independent researchers conducted systematic searches for observational studies published until May 2017 using defined keywords on vitamin D and
health outcomes, including respiratory tract infections (RTIs), wheeze, asthma, atopic
eczema, allergic rhinitis, allergic sensitization, and lung function. Random-effects
meta-analyses were conducted.
Results: A total of 34 from 547 retrieved articles were included. Increased prenatal
exposure to 25(OH)D was inversely associated with risk of RTIs. Comparing the highest with the lowest category of 25(OH)D levels, the pooled odds ratio was 0.64 (95%
CI 0.47, 0.87). A positive borderline association was found for lung function at school
age (FEV1 z-score coefficient 0.07, 95% CI -0.01, 0.15). No associations were found
for wheeze, asthma, atopic eczema, allergic rhinitis, and allergic sensitization.
Conclusion: The introduction of public health measures to tackle vitamin D status in
pregnancy may reduce the burden of RTIs in offspring. Current evidence does not
support an impact on asthma and allergy.
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Citation
Pediatr Allergy Immunol. 2018 May 29(3):243-253
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