Associations of maternal and fetal 25-hydroxyvitamin D levels with childhood lung function and asthma: the Generation R Study

Gazibara, Tatjana, den Dekker, Herman T., de Jongste, Johan C., McGrath, John J., Eyles, Darryl W., Burne, Thomas H., Reiss, Irwin, Franco, Oscar H., Tiemeier, Henning, Jaddoe, Vincent W. V. and Duijts, Liesbeth (2016) Associations of maternal and fetal 25-hydroxyvitamin D levels with childhood lung function and asthma: the Generation R Study. Clinical and Experimental Allergy, 46 2: 337-346. doi:10.1111/cea.12645

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Author Gazibara, Tatjana
den Dekker, Herman T.
de Jongste, Johan C.
McGrath, John J.
Eyles, Darryl W.
Burne, Thomas H.
Reiss, Irwin
Franco, Oscar H.
Tiemeier, Henning
Jaddoe, Vincent W. V.
Duijts, Liesbeth
Title Associations of maternal and fetal 25-hydroxyvitamin D levels with childhood lung function and asthma: the Generation R Study
Journal name Clinical and Experimental Allergy   Check publisher's open access policy
ISSN 0954-7894
1365-2222
Publication date 2016-02
Sub-type Article (original research)
DOI 10.1111/cea.12645
Open Access Status Not Open Access
Volume 46
Issue 2
Start page 337
End page 346
Total pages 24
Place of publication Chichester, West Sussex, United Kingdom
Publisher Wiley-Blackwell
Collection year 2016
Language eng
Formatted abstract
Background: Exposure to low levels of vitamin D in fetal life might be a risk factor for childhood asthma. Objective: We examined whether 25-hydroxyvitamin D levels in mid-gestation and at birth were associated with higher airway resistance and inflammation, and increased risks of wheezing and asthma in school-age children.

Methods: We performed a population-based prospective cohort study among 3130 mothers and their children. Maternal blood samples in mid-gestation and umbilical cord blood samples at birth were used to determine 25-hydroxyvitamin D levels. At age of 6, airway resistance (Rint) was measured by interrupter technique and airway inflammation by fractional exhaled nitric oxide (FENO) using NIOX chemiluminescence analyser. Wheezing and asthma were prospectively assessed by annual questionnaires until age 6.

Results: Maternal levels of 25-hydroxyvitamin D in mid-gestation were not associated with Rint, FeNO, wheezing patterns, or asthma. Children in the lowest tertile of 25-hydroxyvitamin D levels at birth had a higher Rint (Z-score (95% confidence interval [95% CI]): -0.42 (-0.84, -0.01), P-value for trend<0.05), compared to those in the highest tertile group. The effect estimate attenuated when child's current 25-hydroxyvitamin D level was taken into account [Z-score (95% CI): -0.55 (-1.08, 0.01)].

Conclusion and Clinical Relevance: Low levels of 25-hydroxyvitamin D at birth were associated with a higher airway resistance in childhood. Additional adjustment for child's current 25-hydroxyvitamin D level reduced the effect size of the association. Further studies are needed to replicate these findings and to examine mechanisms underlying the observed association and the long-term consequences.
Keyword 25-hydroxyvitamin D
Asthma
Birth
Child
Fractional exhaled nitric oxide
Pregnancy
Rint
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
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