Asthma and atopy in children born by caesarean section: effect modification by family history of allergies – a population based cross-sectional study

BMC Pediatrics

Panayiotis K Yiallouros²  Kostas N Priftis³  Demetris Lamnisos¹  Marina Gavatha⁵  Nicos Middleton¹  Ourania Kolokotroni⁴ 

[1] School of Nursing, Cyprus University of Technology, Limassol, Cyprus;Cyprus International Institute for Environmental and Public Health in Association with Harvard School of Public Health, Cyprus University of Technology, Limassol, Cyprus;Third Department of Pediatrics, University of Athens School of Medicine, Attikon Hospital, Athens, Greece;St George University of London Medical School at the University of Nicosia, Nicosia, Cyprus;Archbishop Makarios III Hospital, Nicosia, Cyprus

关键词: Child;    Atopic sensitization;    Wheeze;    Caesarean section;    Vaginal delivery;    Asthma;   

Others  :  1170610
DOI  :  10.1186/1471-2431-12-179

 received in 2012-03-07, accepted in 2012-11-11,  发布年份 2012

【 摘 要 】

Background

Studies on the association of birth by caesarean section (C/S) and allergies have produced conflicting findings. Furthermore, evidence on whether this association may differ in those at risk of atopy is limited. This study aims to investigate the association of mode of delivery with asthma and atopic sensitization and the extent to which any effect is modified by family history of allergies.

Methods

Asthma outcomes were assessed cross-sectionally in 2216 children at age 8 on the basis of parents’ responses to the ISAAC questionnaire whilst skin prick tests to eleven aeroallergens were also performed in a subgroup of 746 children. Adjusted odds ratios of asthma and atopy by mode of delivery were estimated in multivariable logistic models while evidence of effect modification was examined by introducing interaction terms in the models.

Results

After adjusting for potential confounders, children born by C/S appeared significantly more likely than those born vaginally to report ever wheezing (OR 1.36, 95% CI 1.07-1.71), asthma diagnosis (OR 1.41, 95% CI 1.09-1.83) and be atopic (OR 1.67, 95% CI 1.08-2.60). There was modest evidence that family history of allergies may modify the effect of C/S delivery on atopy (p for effect modification=0.06) but this was not the case for the asthma outcomes. Specifically, while more than a two-fold increase in the odds of being a topic was observed in children with a family history of allergies if born by C/S (OR 2.62, 95% CI 1.38-5.00), no association was observed in children without a family history of allergies (OR 1.16, 95% CI 0.64-2.11).

Conclusions

Birth by C/S is associated with asthma and atopic sensitization in childhood. The association of C/S and atopy appears more pronounced in children with family history of allergies.

【 授权许可】

   
2012 Kolokotroni et al.; licensee BioMed Central Ltd.

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