Time course of temperature effects on cardiovascular mortality in Brisbane, Australia

Yu, Weiwei, Hu, Wenbiao, Mengersen, Kerrie, Guo, Yuming, Pan, Xiaochuan, Connell, Des and Tong, Shilu (2011) Time course of temperature effects on cardiovascular mortality in Brisbane, Australia. Heart, 97 13: 1089-1093. doi:10.1136/hrt.2010.217166


Author Yu, Weiwei
Hu, Wenbiao
Mengersen, Kerrie
Guo, Yuming
Pan, Xiaochuan
Connell, Des
Tong, Shilu
Title Time course of temperature effects on cardiovascular mortality in Brisbane, Australia
Journal name Heart   Check publisher's open access policy
ISSN 1355-6037
1468-201X
Publication date 2011-07-01
Sub-type Article (original research)
DOI 10.1136/hrt.2010.217166
Volume 97
Issue 13
Start page 1089
End page 1093
Total pages 5
Place of publication London, United Kingdom
Publisher B M J Group
Collection year 2012
Language eng
Formatted abstract
Objective To quantify the lagged effects of mean temperature on deaths from cardiovascular diseases in Brisbane, Australia.

Design Polynomial distributed lag models were used to assess the percentage increase in mortality up to 30 days associated with an increase (or decrease) of 1°C above (or below) the threshold temperature.

Setting Brisbane, Australia.

Patients 22 805 cardiovascular deaths registered between 1996 and 2004.

Main outcome measures Deaths from cardiovascular diseases.

Results The results show a longer lagged effect in cold days and a shorter lagged effect in hot days. For the hot effect, a statistically significant association was observed only for lag 0-1 days. The percentage increase in mortality was found to be 3.7% (95% CI 0.4% to 7.1%) for people aged >65 years and 3.5% (95% CI 0.4% to 6.7%) for all ages associated with an increase of 1°C above the threshold temperature of 24°C. For the cold effect, a significant effect of temperature was found for 10-15 lag days. The percentage estimates for older people and all ages were 3.1% (95% CI 0.7% to 5.7%) and 2.8% (95% CI 0.5% to 5.1%), respectively, with a decrease of 1°C below the threshold temperature of 24°C.

Conclusions
The lagged effects lasted longer for cold temperatures but were apparently shorter for hot temperatures. There was no substantial difference in the lag effect of temperature on mortality between all ages and those aged >65 years in Brisbane, Australia.
Keyword Case-crossover analysis
15 European cities
Air-pollution
Ambient-temperature
Distributed lag
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Public Health Publications
 
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Created: Wed, 30 Nov 2011, 21:31:09 EST by Wenbiao Hu on behalf of School of Public Health