Prenatal vitamin D status and respiratory and allergic outcomes in childhood: A meta‐analysis of observational studies. Issue 3 (8th March 2018)

• Record Type: Journal Article
• Authors: Pacheco‐González, Rosa M.; García‐Marcos, Luis; Morales, Eva
• Is Part Of: Pediatric allergy and immunology. Volume 29:Issue 3(2018)
• Page Start: 243
• Page End: 253
• Publication Date: 2018-03-08
• Subjects: allergy -- asthma -- meta‐analysis -- pregnancy -- vitamin D; Allergy in children -- Periodicals; Immunologic diseases in children -- Periodicals; 617
• DOI: 10.1111/pai.12876
• Languages: English
• ISSNs: 0905-6157

Abstract

Abstract: Background: Prenatal vitamin D status may influence offspring's respiratory and allergic outcomes; however, evidence is inconclusive. A systematic review and meta‐analysis 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.