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Asthma and rhinitis among Chinese children - Indoor and outdoor air pollution and indicators of socioeconomic status (SES)
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine. Cent S Univ, Sch Energy Sci & Engn, Changsha, Hunan, Peoples R China.ORCID iD: 0000-0002-5174-6668
Cent S Univ, Sch Energy Sci & Engn, Changsha, Hunan, Peoples R China.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Medical Sciences, Occupational and Environmental Medicine. Chongqing Univ, Key Lab Three Gorges Reservoir Reg Ecoenvironm, Chongqing, Peoples R China.
Tsinghua Univ, Sch Architecture, Beijing, Peoples R China.
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2018 (English)In: Environment International, ISSN 0160-4120, E-ISSN 1873-6750, Vol. 115, p. 1-8Article in journal (Refereed) Published
Abstract [en]

Background: Few data exist on asthma and rhinitis across China in relation to indoor and outdoor air pollution, climate and socioeconomic factors. The main aim was to study associations between asthma, rhinitis and current respiratory symptoms among pre-school children across China and selected indoor and outdoor exposure and indicators of socio-economic status (SES) in mutually adjusted models.

Methods: Chinese children (3-6 yr.) (n = 39,782) were recruited from randomly selected day care centres in seven cities in China. Data on asthma, respiratory symptoms, rhinitis, indoor and outdoor exposure at home and SES were assessed by a parentally administered questionnaire. Lifetime mean ambient temperature, PM10, NO2, and GDP per capita on city level were calculated.

Results: Totally 7.4% had ever doctors' diagnosed (DD) asthma and 8.7% DD-rhinitis, 19.7% had current wheeze, 45.0% rhinitis and 16.9% cough. DD-asthma was associated with ambient temperature (OR = 1.15, 95% CI 1.11-1.20 per degrees C), NO2 (OR = 1.16, 95% CI 1.02-1.33 per 10 mu g/m(3)), indoor mould/dampness (OR = 1.25, 95% CI 1.13-1.39) and living near major roads (OR = 1.13, 95% CI 1.02-1.25). DD-rhinitis was associated with ambient temperature (OR= 1.07, 95% CI 1.05-1.10 per degrees C), NO2 (OR= 1.20, 95% CI 1.09-1.32 per 10 mu g/m(3)), GDP (OR= 1.03, 95% CI 1.01-1.06 per 10,000 RenMinBi/year), indoor mould/dampness (OR= 1.23, 95% CI 1.11-1.35), passive smoking (OR= 1.11, 95% CI 1.01-1.21), and living near major roads (OR= 1.14, 95% CI 1.03-1.25). Children in suburban or rural areas, in larger families (>= 5 persons) and with prenatal farm exposure had less DD-asthma and DD-rhinitis.

Conclusions: Economic development level of the city, higher SES, ambient temperature, NO2, PM10, traffic air pollution and mould/dampness can be risk factors for asthma and rhinitis and respiratory symptoms among preschool children in China. Breastfeeding, large family size and early-life farm exposure could be protective factors.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2018. Vol. 115, p. 1-8
National Category
Respiratory Medicine and Allergy Occupational Health and Environmental Health
Identifiers
URN: urn:nbn:se:uu:diva-356620DOI: 10.1016/j.envint.2018.02.023ISI: 000432523500001PubMedID: 29529393OAI: oai:DiVA.org:uu-356620DiVA, id: diva2:1240172
Available from: 2018-08-20 Created: 2018-08-20 Last updated: 2018-08-20Bibliographically approved

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