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Associations of Inter- and Intraday Temperature Change With Mortality
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine. Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, University of Basel, Basel, Switzerland; .
Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine.
Barcelona, Spain.
Boston, Massachusetts.
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2016 (English)In: American Journal of Epidemiology, ISSN 0002-9262, E-ISSN 1476-6256, Vol. 183, no 4, 286-293 p.Article in journal (Refereed) Published
Abstract [en]

In this study we evaluated the association between temperature variation and mortality and compared it with the contribution due to mean daily temperature in 6 cities with different climates. Quasi-Poisson time series regression models were applied to estimate the associations (relative risk and 95% confidence interval) of mean daily temperature (99th and 1st percentiles, with temperature of minimum mortality as the reference category), interday temperature variation (difference between the mean temperatures of 2 neighboring days) and intraday temperature variation (diurnal temperature range (DTR)) (referred to as median variation) with mortality in 6 cities: London, United Kingdom; Madrid, Spain; Stockholm, Sweden; New York, New York; Miami, Florida; and Houston, Texas (date range, 1985-2010). All cities showed a substantial increase in mortality risk associated with mean daily temperature, with relative risks reaching 1.428 (95% confidence interval (CI): 1.329, 1.533) for heat in Madrid and 1.467 (95% CI: 1.385, 1.555) for cold in London. Inconsistent results for inter-/intraday change were obtained, except for some evidence of protective associations on hot and cold days (relative risk (RR) = 0.977 (95% CI: 0.955, 0.999) and RR = 0.981 (95% CI: 0.971, 0.991), respectively) in Madrid and on cold days in Stockholm (RR = 0.989, 95% CI: 0.980, 0.998). Our results indicate that the association between mortality and temperature variation is generally minimal compared with mean daily temperatures, although further research on intraday changes is needed.

Place, publisher, year, edition, pages
Oxford University Press, 2016. Vol. 183, no 4, 286-293 p.
Keyword [en]
ambient temperature; diurnal temperature range; mortality; temperature variation
National Category
Environmental Health and Occupational Health
URN: urn:nbn:se:umu:diva-114880DOI: 10.1093/aje/kwv205ISI: 000370971900005PubMedID: 26811244OAI: diva2:898692
Available from: 2016-01-29 Created: 2016-01-29 Last updated: 2016-04-15Bibliographically approved

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Vicedo-Cabrera, Ana MForsberg, BertilGasparrini, Antonio
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