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dc.contributor.authorBraga, Alfésio L F
dc.contributor.authorZanobetti, Antonella
dc.contributor.authorSchwartz, Joel David
dc.date.accessioned2011-05-11T03:09:52Z
dc.date.issued2002
dc.identifier.citationBraga, Alfésio L. F., Antonella Zanobetti, and Joel Schwartz. 2002. The effect of weather on respiratory and cardiovascular deaths in 12 U.S. cities. Environmental Health Perspectives 110(9): 859-863.en_US
dc.identifier.issn0091-6765en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:4887125
dc.description.abstractWe carried out time-series analyses in 12 U.S. cities to estimate both the acute effects and the lagged influence of weather on respiratory and cardiovascular disease (CVD) deaths. We fit generalized additive Poisson regressions for each city using nonparametric smooth functions to control for long time trend, season, and barometric pressure. We also controlled for day of the week. We estimated the effect and the lag structure of both temperature and humidity based on a distributed lag model. In cold cities, both high and low temperatures were associated with increased CVD deaths. In general, the effect of cold temperatures persisted for days, whereas the effect of high temperatures was restricted to the day of the death or the day before. For myocardial infarctions (MI), the effect of hot days was twice as large as the cold-day effect, whereas for all CVD deaths the hot-day effect was five times smaller than the cold-day effect. The effect of hot days included some harvesting, because we observed a deficit of deaths a few days later, which we did not observe for the cold-day effect. In hot cities, neither hot nor cold temperatures had much effect on CVD or pneumonia deaths. However, for MI and chronic obstructive pulmonary disease deaths, we observed lagged effects of hot temperatures (lags 4-6 and lags 3 and 4, respectively). We saw no clear pattern for the effect of humidity. In hierarchical models, greater variance of summer and winter temperature was associated with larger effects for hot and cold days, respectively, on respiratory deaths.en_US
dc.language.isoen_USen_US
dc.publisherNational Institute of Environmental Health Sciencesen_US
dc.relation.isversionofhttp://ehpnet1.niehs.nih.gov/docs/2002/110p859-863braga/abstract.htmlen_US
dc.relation.hasversionhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC1240983/pdf/en_US
dash.licenseLAA
dc.subjectcardiovascular deathsen_US
dc.subjectnonparametric smoothingen_US
dc.subjectrespiratory deathsen_US
dc.subjecttemperatureen_US
dc.subjecttime seriesen_US
dc.subjectweatheren_US
dc.titleThe effect of weather on respiratory and cardiovascular deaths in 12 U.S. cities.en_US
dc.typeJournal Articleen_US
dc.description.versionVersion of Recorden_US
dc.relation.journalEnvironmental Health Perspectivesen_US
dash.depositing.authorZanobetti, Antonella
dc.date.available2011-05-11T03:09:52Z
dash.affiliation.otherSPH^Exposure Epidemiology and Risk Programen_US
dash.affiliation.otherHMS^Medicine-Brigham and Women's Hospitalen_US
dash.affiliation.otherSPH^Exposure Epidemiology and Risk Programen_US
dash.contributor.affiliatedSchwartz, Joel
dash.contributor.affiliatedZanobetti, Antonella


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