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Article: Effects of air pollution on asthma hospitalization rates in different age groups in Hong Kong

TitleEffects of air pollution on asthma hospitalization rates in different age groups in Hong Kong
Authors
KeywordsAge
Air pollution
Asthma
Exacerbation
Hong Kong
Issue Date2007
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/CEA
Citation
Clinical And Experimental Allergy, 2007, v. 37 n. 9, p. 1312-1319 How to Cite?
AbstractAims: To assess the relationship between levels of ambient air pollutants and hospitalization rates for asthma in Hong Kong (HK). Methods: This is a retrospective ecological study. Data of daily emergency hospital admissions to 15 major hospitals in HK for asthma and indices of air pollutants [sulphur dioxide (SO2), nitrogen dioxide (NO2), ozone (O 3), particulates with an aerodynamic diameter of <10 μm particulate matter (PM10) and 2.5 μm (PM2.5)] and meteorological variables from January 2000 to December 2005 were obtained from several government departments. Analysis was performed by the generalized additive models with Poisson distribution. The effects of time trend, season, other cyclical factors, temperature and humidity were adjusted. Autocorrelation and overdispersion were corrected. Results: Altogether, 69 716 admissions were assessed. Significant associations were found between hospital admissions for asthma and levels of NO2, O3, PM10 and PM 2.5. The relative risks (RR) for hospitalization for every 10 μg/m3 increase in NO2, O3, PM10 and PM2.5 were 1.028, 1.034, 1.019 and 1.021, respectively, at a lag day that ranged from cumulative lag 0-4 to 0-5. In a multi-pollutant model, O3 was significantly associated with increased admissions for asthma. The younger age group (0-14 years) tended to have a higher RR for each 10 μg/m3 increase in pollutants than those aged 15-65 years. The elderly (aged ≥65 years) had a shorter 'best' lag time to develop asthma exacerbation following exposure to pollutants than those aged <65 years. Conclusion: Adverse effects of ambient concentrations of air pollutants on hospitalization rates for asthma are evident. Measures to improve air quality in HK are urgently needed. © 2007 Blackwell Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/92591
ISSN
2015 Impact Factor: 5.587
2015 SCImago Journal Rankings: 2.184
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKo, FWSen_HK
dc.contributor.authorTam, Wen_HK
dc.contributor.authorWong, TWen_HK
dc.contributor.authorLai, CKWen_HK
dc.contributor.authorWong, GWKen_HK
dc.contributor.authorLeung, TFen_HK
dc.contributor.authorNg, SSSen_HK
dc.contributor.authorHui, DSCen_HK
dc.date.accessioned2010-09-17T10:51:03Z-
dc.date.available2010-09-17T10:51:03Z-
dc.date.issued2007en_HK
dc.identifier.citationClinical And Experimental Allergy, 2007, v. 37 n. 9, p. 1312-1319en_HK
dc.identifier.issn0954-7894en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92591-
dc.description.abstractAims: To assess the relationship between levels of ambient air pollutants and hospitalization rates for asthma in Hong Kong (HK). Methods: This is a retrospective ecological study. Data of daily emergency hospital admissions to 15 major hospitals in HK for asthma and indices of air pollutants [sulphur dioxide (SO2), nitrogen dioxide (NO2), ozone (O 3), particulates with an aerodynamic diameter of <10 μm particulate matter (PM10) and 2.5 μm (PM2.5)] and meteorological variables from January 2000 to December 2005 were obtained from several government departments. Analysis was performed by the generalized additive models with Poisson distribution. The effects of time trend, season, other cyclical factors, temperature and humidity were adjusted. Autocorrelation and overdispersion were corrected. Results: Altogether, 69 716 admissions were assessed. Significant associations were found between hospital admissions for asthma and levels of NO2, O3, PM10 and PM 2.5. The relative risks (RR) for hospitalization for every 10 μg/m3 increase in NO2, O3, PM10 and PM2.5 were 1.028, 1.034, 1.019 and 1.021, respectively, at a lag day that ranged from cumulative lag 0-4 to 0-5. In a multi-pollutant model, O3 was significantly associated with increased admissions for asthma. The younger age group (0-14 years) tended to have a higher RR for each 10 μg/m3 increase in pollutants than those aged 15-65 years. The elderly (aged ≥65 years) had a shorter 'best' lag time to develop asthma exacerbation following exposure to pollutants than those aged <65 years. Conclusion: Adverse effects of ambient concentrations of air pollutants on hospitalization rates for asthma are evident. Measures to improve air quality in HK are urgently needed. © 2007 Blackwell Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/CEAen_HK
dc.relation.ispartofClinical and Experimental Allergyen_HK
dc.subjectAgeen_HK
dc.subjectAir pollutionen_HK
dc.subjectAsthmaen_HK
dc.subjectExacerbationen_HK
dc.subjectHong Kongen_HK
dc.titleEffects of air pollution on asthma hospitalization rates in different age groups in Hong Kongen_HK
dc.typeArticleen_HK
dc.identifier.emailTam, W: wwstam@hkucc.hku.hken_HK
dc.identifier.authorityTam, W=rp01378en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-2222.2007.02791.xen_HK
dc.identifier.pmid17845411-
dc.identifier.scopuseid_2-s2.0-34548474580en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-34548474580&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume37en_HK
dc.identifier.issue9en_HK
dc.identifier.spage1312en_HK
dc.identifier.epage1319en_HK
dc.identifier.eissn1365-2222-
dc.identifier.isiWOS:000249253100008-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridKo, FWS=7103224911en_HK
dc.identifier.scopusauthoridTam, W=9740867000en_HK
dc.identifier.scopusauthoridWong, TW=7403531744en_HK
dc.identifier.scopusauthoridLai, CKW=7403086390en_HK
dc.identifier.scopusauthoridWong, GWK=7402527629en_HK
dc.identifier.scopusauthoridLeung, TF=7202110942en_HK
dc.identifier.scopusauthoridNg, SSS=21233825300en_HK
dc.identifier.scopusauthoridHui, DSC=7101862411en_HK
dc.identifier.citeulike1630727-

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