The effect of various temperature indicators on different mortality categories in a subtropical city of Brisbane, Australia

Weiwei Yu, Yuming Guo, Xiaofang Ye, Xiaoyu Wang, Cunrui Huang, Xiaochuan Pan, Shilu Tong

Research output: Contribution to journalArticleResearchpeer-review

19 Citations (Scopus)

Abstract

Background: The relationship between temperature and mortality has been explored for decades and many temperature indicators have been applied separately. However, few data are available to show how the effects of different temperature indicators on different mortality categories, particularly in a typical subtropical climate. Objective: To assess the associations between various temperature indicators and different mortality categories in Brisbane, Australia during 1996-2004. Methods: We applied two methods to assess the threshold and temperature indicator for each age and death groups: mean temperature and the threshold assessed from all cause mortality was used for all mortality categories; the specific temperature indicator and the threshold for each mortality category were identified separately according to the minimisation of AIC. We conducted polynomial distributed lag non-linear model to identify effect estimates in mortality with one degree of temperature increase (or decrease) above (or below) the threshold on current days and lagged effects using both methods. Results: Akaike's Information Criterion was minimized when mean temperature was used for all non-external deaths and deaths from 75 to 84. years; when minimum temperature was used for deaths from 0 to 64. years, 65-74. years, ≥ 85. years, and from the respiratory diseases; when maximum temperature was used for deaths from cardiovascular diseases. The effect estimates using certain temperature indicators were similar as mean temperature both for current day and lag effects. Conclusion: Different age groups and death categories were sensitive to different temperature indicators. However, the effect estimates from certain temperature indicators did not significantly differ from those of mean temperature.

Original languageEnglish
Pages (from-to)3431-3437
Number of pages7
JournalScience of the Total Environment
Volume409
Issue number18
DOIs
Publication statusPublished - 15 Aug 2011
Externally publishedYes

Keywords

  • Cardiovascular mortality
  • Lag effect
  • Respiratory mortality
  • Temperature
  • The elderly

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