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Effects of extreme temperatures on years of life lost for cardiovascular deaths : a time series study in Brisbane, Australia

Huang, Cunrui, Barnett, Adrian G., Wang, Xiaoming, & Tong, Shilu (2012) Effects of extreme temperatures on years of life lost for cardiovascular deaths : a time series study in Brisbane, Australia. Circulation: Cardiovascular Quality and Outcomes, 5(5), pp. 609-614.

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Abstract

Background: Extreme temperatures are associated with cardiovascular disease (CVD) deaths. Previous studies have investigated the relative CVD mortality risk of temperature, but this risk is heavily influenced by deaths in frail elderly persons. To better estimate the burden of extreme temperatures we estimated their effects on years of life lost due to CVD.

Methods and Results: The data were daily observations on weather and CVD mortality for Brisbane, Australia between 1996 and 2004. We estimated the association between daily mean temperature and years of life lost due to CVD, after adjusting for trend, season, day of the week, and humidity. To examine the non-linear and delayed effects of temperature, a distributed lag non-linear model was used. The model’s residuals were examined to investigate if there were any added effects due to cold spells and heat waves. The exposure-response curve between temperature and years of life lost was U-shaped, with the lowest years of life lost at 24 °C. The curve had a sharper rise at extremes of heat than of cold. The effect of cold peaked two days after exposure, whereas the greatest effect of heat occurred on the day of exposure. There were significantly added effects of heat waves on years of life lost.

Conclusions: Increased years of life lost due to CVD are associated with both cold and hot temperatures. Research on specific interventions is needed to reduce temperature-related years of life lost from CVD deaths.

Impact and interest:

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10 citations in Web of Science®

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ID Code: 53881
Item Type: Journal Article
Additional URLs:
Keywords: cardiovascular disease, heat wave, mortality, temperature, years of life lost
DOI: 10.1161/CIRCOUTCOMES.112.965707
ISSN: 1941-7705 (online) 1941-7713 (print)
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CARDIOVASCULAR MEDICINE AND HAEMATOLOGY (110200)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700)
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Public Health & Social Work
Deposited On: 28 Sep 2012 12:19
Last Modified: 13 Jun 2013 01:11

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