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Article: Season and humidity dependence of the effects of air pollution on COPD hospitalizations in Hong Kong

TitleSeason and humidity dependence of the effects of air pollution on COPD hospitalizations in Hong Kong
Authors
KeywordsWeather factors
Time series study
Gaseous pollutants
Chronic obstructive pulmonary disease
Emergency hospital admissions
Issue Date2013
Citation
Atmospheric Environment, 2013, v. 76, p. 74-80 How to Cite?
AbstractAssociations between ambient pollution and respiratory morbidity including chronic obstructive pulmonary disease (COPD) have been confirmed. Weather factors, such as temperature, season and relative humidity (RH), may modify the effects of air pollution. This time series study was conducted to examine whether the effects of air pollution on emergency COPD hospital admissions in Hong Kong varied across seasons and RH levels, and explore the possible joint modification of season and RH on the effects of pollution. Data of daily air pollution concentrations mean temperature and RH, and COPD hospital admissions from 1998 to 2007 were collected. Generalized additive Poisson models with interaction terms were used to estimate the effects of pollution across seasons and RH levels. We observed an increase in the detrimental effects of air pollution in the cool season and on low humidity days. On the cool and dry days, a 10μgm-3 increment of lag03 exposure was associated with an increase in emergency COPD admissions by 1.76% (95%CI: 1.19-2.34%), 3.43% (95%CI: 2.80-4.07%), and 1.99% (95%CI: 0.90-3.09%) for nitrogen dioxide (NO2), ozone (O3), and sulfur dioxide (SO2), respectively, all of which were statistically significantly higher than those on the other days. No consistent modification of weather factors was found for the effects of particles with an aerodynamic diameter less than 10μm (PM10). The results suggested that season and RH jointly modified the effects of gaseous pollutants, resulting in increased emergency COPD hospitalizations on the cool and dry days. © 2012 Elsevier Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/207069
ISSN
2015 Impact Factor: 3.459
2015 SCImago Journal Rankings: 1.999

 

DC FieldValueLanguage
dc.contributor.authorQiu, Hong-
dc.contributor.authorYu, Ignatius-
dc.contributor.authorWang, Xiaorong-
dc.contributor.authorTian, Linwei-
dc.contributor.authorTse, Lapah-
dc.contributor.authorWong, Tzewai-
dc.date.accessioned2014-12-09T04:31:20Z-
dc.date.available2014-12-09T04:31:20Z-
dc.date.issued2013-
dc.identifier.citationAtmospheric Environment, 2013, v. 76, p. 74-80-
dc.identifier.issn1352-2310-
dc.identifier.urihttp://hdl.handle.net/10722/207069-
dc.description.abstractAssociations between ambient pollution and respiratory morbidity including chronic obstructive pulmonary disease (COPD) have been confirmed. Weather factors, such as temperature, season and relative humidity (RH), may modify the effects of air pollution. This time series study was conducted to examine whether the effects of air pollution on emergency COPD hospital admissions in Hong Kong varied across seasons and RH levels, and explore the possible joint modification of season and RH on the effects of pollution. Data of daily air pollution concentrations mean temperature and RH, and COPD hospital admissions from 1998 to 2007 were collected. Generalized additive Poisson models with interaction terms were used to estimate the effects of pollution across seasons and RH levels. We observed an increase in the detrimental effects of air pollution in the cool season and on low humidity days. On the cool and dry days, a 10μgm-3 increment of lag03 exposure was associated with an increase in emergency COPD admissions by 1.76% (95%CI: 1.19-2.34%), 3.43% (95%CI: 2.80-4.07%), and 1.99% (95%CI: 0.90-3.09%) for nitrogen dioxide (NO2), ozone (O3), and sulfur dioxide (SO2), respectively, all of which were statistically significantly higher than those on the other days. No consistent modification of weather factors was found for the effects of particles with an aerodynamic diameter less than 10μm (PM10). The results suggested that season and RH jointly modified the effects of gaseous pollutants, resulting in increased emergency COPD hospitalizations on the cool and dry days. © 2012 Elsevier Ltd.-
dc.languageeng-
dc.relation.ispartofAtmospheric Environment-
dc.subjectWeather factors-
dc.subjectTime series study-
dc.subjectGaseous pollutants-
dc.subjectChronic obstructive pulmonary disease-
dc.subjectEmergency hospital admissions-
dc.titleSeason and humidity dependence of the effects of air pollution on COPD hospitalizations in Hong Kong-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.atmosenv.2012.07.026-
dc.identifier.scopuseid_2-s2.0-84879419372-
dc.identifier.volume76-
dc.identifier.spage74-
dc.identifier.epage80-
dc.identifier.eissn1873-2844-

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