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Article: Urban climate modified short-term association of air pollution with pneumonia mortality in Hong Kong

TitleUrban climate modified short-term association of air pollution with pneumonia mortality in Hong Kong
Authors
KeywordsAir pollution
Pneumonia
Urban climate map
Case-only study
Case-crossover study
Nested case-control study
Issue Date2019
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenv
Citation
Science of the Total Environment, 2019, v. 646, p. 618-624 How to Cite?
AbstractBackground: City is becoming warmer, especially in the process of urbanization and climate change. However, it is largely unknown whether this warming urban climate may modify the short-term effects of air pollution. Objectives: To test whether warmer urban climates intensify the acute mortality effects of air pollution on pneumonia in Hong Kong. Methods: Participants who died of pneumonia from a prospective Chinese elderly cohort between 1998 and 2011 were selected as cases. Urban climatic (UC) classes of cases were determined by an established Urban Climatic Map according to their residential addresses. UC classes were first dichotomized into cool and warm climates and case-crossover analysis was used to estimate the short-term association of pneumonia mortality with air pollution. We further classified UC classes into climate quartiles and used case-only analysis to test the trend of urban climate modification on the short-term association of pneumonia mortality with air pollution. Results: Among 66,820 elders (≥65 years), 2208 pneumonia deaths (cases) were identified during the 11–14 years of follow-up. The effects of air pollution for cases residing in the warm climate were statistically significant (p < 0.05) higher than those living in the cool climate. There was an increasing linear trend of urban climate modification on the association of pneumonia mortality with NO2 (nitrogen dioxide) (p for trend = 0.035). Compared to climate Quartile 1 (the lowest), deaths resided in climate Quartile 2, 3, and 4 (the highest) were associated with an additional percent change of 9.07% (0.52%, 17.62%), 12.89% (4.34%, 21.43%), and 8.45% (−0.10%, 17.00%), respectively. Conclusions: Warmer urban climate worsened the acute mortality effects of pneumonia associated with air pollutants in Hong Kong. Our findings suggest that warmer urban climate introduced by climate change and urbanization may increase the risks of air pollution-related pneumonia.
Persistent Identifierhttp://hdl.handle.net/10722/258975
ISSN
2017 Impact Factor: 4.61
2015 SCImago Journal Rankings: 1.702
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSun, S-
dc.contributor.authorTian, L-
dc.contributor.authorCao, W-
dc.contributor.authorLai, PC-
dc.contributor.authorWong, PPY-
dc.contributor.authorLee, RSY-
dc.contributor.authorMason, TG-
dc.contributor.authorKramer, A-
dc.contributor.authorWong, CM-
dc.date.accessioned2018-09-03T03:59:26Z-
dc.date.available2018-09-03T03:59:26Z-
dc.date.issued2019-
dc.identifier.citationScience of the Total Environment, 2019, v. 646, p. 618-624-
dc.identifier.issn0048-9697-
dc.identifier.urihttp://hdl.handle.net/10722/258975-
dc.description.abstractBackground: City is becoming warmer, especially in the process of urbanization and climate change. However, it is largely unknown whether this warming urban climate may modify the short-term effects of air pollution. Objectives: To test whether warmer urban climates intensify the acute mortality effects of air pollution on pneumonia in Hong Kong. Methods: Participants who died of pneumonia from a prospective Chinese elderly cohort between 1998 and 2011 were selected as cases. Urban climatic (UC) classes of cases were determined by an established Urban Climatic Map according to their residential addresses. UC classes were first dichotomized into cool and warm climates and case-crossover analysis was used to estimate the short-term association of pneumonia mortality with air pollution. We further classified UC classes into climate quartiles and used case-only analysis to test the trend of urban climate modification on the short-term association of pneumonia mortality with air pollution. Results: Among 66,820 elders (≥65 years), 2208 pneumonia deaths (cases) were identified during the 11–14 years of follow-up. The effects of air pollution for cases residing in the warm climate were statistically significant (p < 0.05) higher than those living in the cool climate. There was an increasing linear trend of urban climate modification on the association of pneumonia mortality with NO2 (nitrogen dioxide) (p for trend = 0.035). Compared to climate Quartile 1 (the lowest), deaths resided in climate Quartile 2, 3, and 4 (the highest) were associated with an additional percent change of 9.07% (0.52%, 17.62%), 12.89% (4.34%, 21.43%), and 8.45% (−0.10%, 17.00%), respectively. Conclusions: Warmer urban climate worsened the acute mortality effects of pneumonia associated with air pollutants in Hong Kong. Our findings suggest that warmer urban climate introduced by climate change and urbanization may increase the risks of air pollution-related pneumonia.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/scitotenv-
dc.relation.ispartofScience of the Total Environment-
dc.subjectAir pollution-
dc.subjectPneumonia-
dc.subjectUrban climate map-
dc.subjectCase-only study-
dc.subjectCase-crossover study-
dc.subjectNested case-control study-
dc.titleUrban climate modified short-term association of air pollution with pneumonia mortality in Hong Kong-
dc.typeArticle-
dc.identifier.emailTian, L: linweit@hku.hk-
dc.identifier.emailCao, W: wncao@HKUCC-COM.hku.hk-
dc.identifier.emailLai, PC: pclai@hku.hk-
dc.identifier.authorityTian, L=rp01991-
dc.identifier.authorityLai, PC=rp00565-
dc.identifier.authorityWong, CM=rp00338-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.scitotenv.2018.07.311-
dc.identifier.pmid30059922-
dc.identifier.scopuseid_2-s2.0-85050469638-
dc.identifier.hkuros289139-
dc.identifier.volume646-
dc.identifier.spage618-
dc.identifier.epage624-
dc.identifier.isiWOS:000445164800060-
dc.publisher.placeNetherlands-

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