Increasing prevalence of asthma and allergy in Beijing pre-school children: Is exclusive breastfeeding for more than 6 months protectiveReport as inadecuate




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Chinese Science Bulletin

, Volume 58, Issue 34, pp 4190–4202

First Online: 21 May 2013Received: 06 October 2012Accepted: 28 February 2013DOI: 10.1007-s11434-013-5790-6

Cite this article as: Qu, F., Weschler, L.B., Sundell, J. et al. Chin. Sci. Bull. 2013 58: 4190. doi:10.1007-s11434-013-5790-6

Abstract

This study evaluated the prevalence and risk factors for asthma, allergy and related symptoms; and breastfeeding patterns and durations for 5479 Beijing children aged 3–6. Parents of children in randomly selected kindergartens wrote responses to a questionnaire used previously. The study aimed to evaluate trends in the prevalence of asthma and related illnesses, and to determine whether -more- breastfeeding, defined as exclusive, > 6 months, was associated with reduced prevalence. Asthma has increased in this age group between 1990 and 2011, with the steepest increase in the last 2–3 years. Of the total, 14.2% 779 children were breastfed exclusively for > 6 months. The efficacy of -more- breastfeeding was tested in a subset with two strong risk factors, positive family history for asthma and-or allergy and male gender. -More- breastfeeding was found to be significantly protective aOR 0.42, P < 0.05 for this subset against Doctor-diagnosed asthma D-asthma. Protection that did not reach statistical significance was also found for this subset against Wheeze ever, Cough at night, Rhinitis ever, Doctor-diagnosed rhinitis D-rhinitis and Eczema. The greatest protective effects were found for girls with no family history of asthma or allergy, reaching statistical significance for Wheeze ever aOR 0.48, P < 0.01, Cough at night aOR 0.47, P < 0.01, D-asthma aOR 0.14, P < 0.01 and Rhinitis ever aOR 0.67, P < 0.05. -More- breastfeeding was not consistently associated with either a protective or risk effect for Eczema.

Keywordsfamily history urbanization epigenetics wheeze rhinitis eczema This article is published with open access at Springerlink.com

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Author: Fang Qu - Louise B. Weschler - Jan Sundell - YinPing Zhang

Source: https://link.springer.com/



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