| Maternal late-pregnancy serum 25-hydroxyvitamin D in relation to childhood wheeze and atopic outcomes. | |
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MedLine Citation:
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PMID: 22707522 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND: Studies exploring the relationship between prenatal vitamin D exposure and childhood asthma have yielded conflicting results. Higher vitamin D intake during pregnancy has been shown to lower the risk of childhood wheeze, yet a study of maternal late-pregnancy serum 25-hydroxyvitamin D suggested higher serum concentrations may be associated with increased childhood asthma. OBJECTIVE: To assess the relationship between mothers' serum 25-hydroxyvitamin D status and asthma and wheeze phenotypes in their children at age 6 years. Also to explore the relationship between maternal 25-hydroxyvitamin D status and objective measures of childhood atopy and lung function. METHODS: Serum 25-hydroxyvitamin D was measured at 34 weeks' gestation in the mothers of 860 children born at term. Wheeze was classified as either transient or persistent/late using questionnaire data collated from 6, 12, 24 and 36 months and 6 years. At 6 years spirometry was performed and atopic status was determined by skin prick testing, exhaled nitric oxide was measured in 451 children and bronchial hyperresponsiveness in 216 children. RESULTS: There were no significant associations between maternal late-pregnancy 25-hydroxyvitamin D status and either asthma or wheeze at age 6 years. Maternal vitamin D status was not associated with transient or persistent/late wheeze; no significant association was found between persistent/late wheeze when subdivided according to atopic status. No associations were found with skin sensitisation or lung function. CONCLUSIONS: This study provides no evidence that exposure to higher concentrations of 25-hydroxyvitamin D in maternal serum during late pregnancy increases the risk of childhood asthma, wheeze or atopy. |
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Authors:
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Katharine C Pike; Hazel M Inskip; Sian Robinson; Jane S Lucas; Cyrus Cooper; Nicholas C Harvey; Keith M Godfrey; Graham Roberts; |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-6-15 |
Journal Detail:
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Title: Thorax Volume: - ISSN: 1468-3296 ISO Abbreviation: - Publication Date: 2012 Jun |
Date Detail:
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Created Date: 2012-6-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0417353 Medline TA: Thorax Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Clinical and Experimental Sciences Academic Unit, University of Southampton Faculty of Medicine, Southampton, UK. |
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