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Ambient temperature enhanced acute cardiovascular-respiratory mortality effects of PM2.5 in Beijing, China

International Journal of Biometeorology volume 59, pages 1761–1770 (2015)Cite this article

Abstract

Studies have shown that temperature could modify the effect of ambient fine particles on mortality risk. In assessing air pollution effects, temperature is usually considered as a confounder. However, ambient temperature can alter people’s physiological response to air pollution and might “modify” the impact of air pollution on health outcomes. This study investigated the interaction between daily PM2.5 and daily mean temperature in Beijing, China, using data for the period 2005–2009. Bivariate PM2.5–temperature response surfaces and temperature-stratified generalized additive model (GAM) were applied to study the effect of PM2.5 on cardiovascular, respiratory mortality, and total non-accidental mortality across different temperature levels. We found that low temperature could significantly enhance the effect of PM2.5 on cardiovascular mortality. For an increase of 10 μg/m3 in PM2.5 concentration in the lowest temperature range (−9.7∼2.6 °C), the relative risk (RR) of cardiovascular mortality increased 1.27 % (95 % CI 0.38∼2.17 %), which was higher than that of the whole temperature range (0.59 %, 95 % CI 0.22–1.16 %). The largest effect of PM2.5 on respiratory mortality appeared in the high temperature range. For an increase of 10 μg/m3 in PM2.5 concentration, RR of respiratory mortality increased 1.70 % (95 % CI 0.92∼3.33 %) in the highest level (23.50∼31.80 °C). For the total non-accidental mortality, significant associations appeared only in low temperature levels (−9.7∼2.6 °C): for an increase of 10 μg/m3 in current day PM2.5 concentration, RR increased 1.27 % (95 % CI 0.46∼2.00 %) in the lowest temperature level. No lag effect was observed. The results suggest that in air pollution mortality time series studies, the possibility of an interaction between air pollution and temperature should be considered.

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Acknowledgments

This research was supported by grants from National Key Project of Basic Research (2011CB403404), National Natural Science Foundation (nos. 21307158 and 41105092).

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Affiliations

  1. CMA Key Laboratory for Atmospheric Chemistry, Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing, China

    Yi Li

  2. Institute of Urban Meteorology, China Meteorological Administration, Beijing, China

    Zhiqiang Ma

  3. Chinese Center for Disease Control and Prevention, No.155, Changbai Road, Changping District, Beijing, China

    Canjun Zheng

  4. Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai, China

    Yu Shang

Authors
  1. Yi Li
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  2. Zhiqiang Ma
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  3. Canjun Zheng
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  4. Yu Shang
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Corresponding author

Correspondence to Canjun Zheng.

Additional information

Yi Li holds a PhD degree, Chinese Academy of Meteorological Sciences.

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Li, Y., Ma, Z., Zheng, C. et al. Ambient temperature enhanced acute cardiovascular-respiratory mortality effects of PM2.5 in Beijing, China. Int J Biometeorol 59, 1761–1770 (2015). https://doi.org/10.1007/s00484-015-0984-z

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  • DOI: https://doi.org/10.1007/s00484-015-0984-z

Keywords

  • Particulate matter
  • Interaction
  • Mortality
  • Temperature