Time course of temperature effects on cardiovascular mortality in Brisbane, Australia
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Author(s)
Yu, Weiwei
Hu, Wenbiao
Mengersen, Kerrie
Guo, Yuming
Pan, Xiaochuan
Connell, Des
Tong, Shilu
Griffith University Author(s)
Year published
2011
Metadata
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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 1àabove (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 ...
View more >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 1àabove (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 1àabove the threshold temperature of 24î 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 1àbelow the threshold temperature of 24î 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.
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View more >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 1àabove (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 1àabove the threshold temperature of 24î 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 1àbelow the threshold temperature of 24î 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.
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Journal Title
Heart
Volume
97
Issue
13
Copyright Statement
© The Author(s) 2011. The attached file is reproduced here in accordance with the copyright policy of the publisher. For information about this journal please refer to the journal’s website or contact the authors.
Subject
Cardiovascular medicine and haematology
Cardiovascular medicine and haematology not elsewhere classified
Clinical sciences