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Long-term exposure to background air pollution related to respiratory and allergic health in schoolchildren.
Clin Exp Allergy 2005; 35(10):1279-87CE

Abstract

BACKGROUND

The impact of air pollution on asthma and allergies still remains a debate.

OBJECTIVE

Our cross-sectional study was intended to analyse the associations between long-term exposure to background air pollution and atopic and respiratory outcomes in a large population-based sample of schoolchildren.

METHODS

Six thousand six hundred and seventy-two children aged 9-11 years recruited from 108 randomly schools in six French cities underwent a clinical examination including a skin prick test (SPT) to common allergens, exercise-induced bronchial reactivity (EIB) and skin examination for flexural dermatitis. The prevalence of asthma, allergic rhinitis (AR) and atopic dermatitis was assessed by a standardized health questionnaire completed by the parents. Three-year-averaged concentrations of air pollutants (NO2, SO2, PM10 and O3) were calculated at children' schools using measurements of background monitoring stations.

RESULTS

After adjusting for confounders, EIB, lifetime asthma and lifetime AR were found to be positively related to an increase in the exposure to SO2, PM10 and O3. The adjusted odds ratios (aOR) per increase of 5 microg/m3 of SO2 was 1.39 (95% confidence interval (CI)=1.15-1.66) for EIB and 1.19 (1.00-1.41) for lifetime asthma. The aOR for lifetime AR per increase of 10 microg/m3 of PM10 was 1.32 (CI=1.04-1.68). Moreover, SPT positivity was associated with O3 (aOR=1.34; CI=1.24-1.46). Associations with past year symptoms were consistent, even if not always statistically significant. Results persisted in long-term resident (current address for at least 8 years) children. However, no consistent positive association was found with NO2.

CONCLUSIONS

A moderate increase in long-term exposure to background ambient air pollution was associated with an increased prevalence of respiratory and atopic indicators in children.

Authors+Show Affiliations

INSERM U472, Epidemiology of Allergic and Respiratory Diseases, Villejuif, France. celine.morand@polytechnique.orgNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Multicenter Study
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16238786

Citation

Pénard-Morand, C, et al. "Long-term Exposure to Background Air Pollution Related to Respiratory and Allergic Health in Schoolchildren." Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, vol. 35, no. 10, 2005, pp. 1279-87.
Pénard-Morand C, Charpin D, Raherison C, et al. Long-term exposure to background air pollution related to respiratory and allergic health in schoolchildren. Clin Exp Allergy. 2005;35(10):1279-87.
Pénard-Morand, C., Charpin, D., Raherison, C., Kopferschmitt, C., Caillaud, D., Lavaud, F., & Annesi-Maesano, I. (2005). Long-term exposure to background air pollution related to respiratory and allergic health in schoolchildren. Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology, 35(10), pp. 1279-87.
Pénard-Morand C, et al. Long-term Exposure to Background Air Pollution Related to Respiratory and Allergic Health in Schoolchildren. Clin Exp Allergy. 2005;35(10):1279-87. PubMed PMID: 16238786.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Long-term exposure to background air pollution related to respiratory and allergic health in schoolchildren. AU - Pénard-Morand,C, AU - Charpin,D, AU - Raherison,C, AU - Kopferschmitt,C, AU - Caillaud,D, AU - Lavaud,F, AU - Annesi-Maesano,I, PY - 2005/10/22/pubmed PY - 2006/2/10/medline PY - 2005/10/22/entrez SP - 1279 EP - 87 JF - Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology JO - Clin. Exp. Allergy VL - 35 IS - 10 N2 - BACKGROUND: The impact of air pollution on asthma and allergies still remains a debate. OBJECTIVE: Our cross-sectional study was intended to analyse the associations between long-term exposure to background air pollution and atopic and respiratory outcomes in a large population-based sample of schoolchildren. METHODS: Six thousand six hundred and seventy-two children aged 9-11 years recruited from 108 randomly schools in six French cities underwent a clinical examination including a skin prick test (SPT) to common allergens, exercise-induced bronchial reactivity (EIB) and skin examination for flexural dermatitis. The prevalence of asthma, allergic rhinitis (AR) and atopic dermatitis was assessed by a standardized health questionnaire completed by the parents. Three-year-averaged concentrations of air pollutants (NO2, SO2, PM10 and O3) were calculated at children' schools using measurements of background monitoring stations. RESULTS: After adjusting for confounders, EIB, lifetime asthma and lifetime AR were found to be positively related to an increase in the exposure to SO2, PM10 and O3. The adjusted odds ratios (aOR) per increase of 5 microg/m3 of SO2 was 1.39 (95% confidence interval (CI)=1.15-1.66) for EIB and 1.19 (1.00-1.41) for lifetime asthma. The aOR for lifetime AR per increase of 10 microg/m3 of PM10 was 1.32 (CI=1.04-1.68). Moreover, SPT positivity was associated with O3 (aOR=1.34; CI=1.24-1.46). Associations with past year symptoms were consistent, even if not always statistically significant. Results persisted in long-term resident (current address for at least 8 years) children. However, no consistent positive association was found with NO2. CONCLUSIONS: A moderate increase in long-term exposure to background ambient air pollution was associated with an increased prevalence of respiratory and atopic indicators in children. SN - 0954-7894 UR - https://www.unboundmedicine.com/medline/citation/16238786/Long_term_exposure_to_background_air_pollution_related_to_respiratory_and_allergic_health_in_schoolchildren_ L2 - https://doi.org/10.1111/j.1365-2222.2005.02336.x DB - PRIME DP - Unbound Medicine ER -