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Humidity May Modify the Relationship between Temperature and Cardiovascular Mortality in Zhejiang Province, China

Author

Listed:
  • Jie Zeng

    (School of Public Health, Sun Yat-sen University, Guangzhou 510080, China
    Co-first authors.)

  • Xuehai Zhang

    (Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
    Co-first authors.)

  • Jun Yang

    (Institute for Environmental and Climate Research, Jinan University, Guangzhou 510632, China)

  • Junzhe Bao

    (School of Public Health, Sun Yat-sen University, Guangzhou 510080, China)

  • Hao Xiang

    (Department of Epidemiology and Biostatistics, School of Public Health, Wuhan University, Wuhan 430072, China)

  • Keith Dear

    (School of Public Health, University of Adelaide, Adelaide 5005, Australia)

  • Qiyong Liu

    (National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China)

  • Shao Lin

    (School of Public Health, University at Albany, State University of New York, Albany, NY 12222, USA)

  • Wayne R. Lawrence

    (School of Public Health, University at Albany, State University of New York, Albany, NY 12222, USA)

  • Aihua Lin

    (School of Public Health, Sun Yat-sen University, Guangzhou 510080, China)

  • Cunrui Huang

    (School of Public Health, Sun Yat-sen University, Guangzhou 510080, China)

Abstract

Background : The evidence of increased mortality attributable to extreme temperatures is widely characterized in climate-health studies. However, few of these studies have examined the role of humidity on temperature-mortality association. We investigated the joint effect between temperature and humidity on cardiovascular disease (CVD) mortality in Zhejiang Province, China. Methods : We collected data on daily meteorological and CVD mortality from 11 cities in Zhejiang Province during 2010–2013. We first applied time-series Poisson regression analysis within the framework of distributed lag non-linear models to estimate the city-specific effect of temperature and humidity on CVD mortality, after controlling for temporal trends and potential confounding variables. We then applied a multivariate meta-analytical model to pool the effect estimates in the 11 cities to generate an overall provincial estimate. The joint effects between them were calculated by the attributable fraction (AF). The analyses were further stratified by gender, age group, education level, and location of cities. Results : In total, 120,544 CVD deaths were recorded in this study. The mean values of temperature and humidity were 17.6 °C and 72.3%. The joint effect between low temperature and high humidity had the greatest impact on the CVD death burden over a lag of 0–21 days with a significant AF of 31.36% (95% eCI: 14.79–38.41%), while in a condition of low temperature and low humidity with a significant AF of 16.74% (95% eCI: 0.89, 24.44). The AFs were higher at low temperature and high humidity in different subgroups. When considering the levels of humidity, the AFs were significant at low temperature and high humidity for males, youth, those with a low level of education, and coastal area people. Conclusions : The combination of low temperature and high humidity had the greatest impact on the CVD death burden in Zhejiang Province. This evidence has important implications for developing CVD interventions.

Suggested Citation

  • Jie Zeng & Xuehai Zhang & Jun Yang & Junzhe Bao & Hao Xiang & Keith Dear & Qiyong Liu & Shao Lin & Wayne R. Lawrence & Aihua Lin & Cunrui Huang, 2017. "Humidity May Modify the Relationship between Temperature and Cardiovascular Mortality in Zhejiang Province, China," IJERPH, MDPI, vol. 14(11), pages 1-11, November.
    • Handle: RePEc:gam:jijerp:v:14:y:2017:i:11:p:1383-:d:118821
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    References listed on IDEAS

    as
    1. Barreca, Alan I., 2012. "Climate change, humidity, and mortality in the United States," Journal of Environmental Economics and Management, Elsevier, vol. 63(1), pages 19-34.
    2. Yongjun Cao & Xia Wang & Danni Zheng & Thompson Robinson & Daqing Hong & Sarah Richtering & Tzen Hugh Leong & Abdul Salam & Craig Anderson & Maree L. Hackett, 2016. "Air Pressure, Humidity and Stroke Occurrence: A Systematic Review and Meta-Analysis," IJERPH, MDPI, vol. 13(7), pages 1-10, July.
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    Cited by:

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    2. Iara da Silva & Caroline Fernanda Hei Wikuats & Elizabeth Mie Hashimoto & Leila Droprinchinski Martins, 2022. "Effects of Environmental and Socioeconomic Inequalities on Health Outcomes: A Multi-Region Time-Series Study," IJERPH, MDPI, vol. 19(24), pages 1-22, December.
    3. Qing Tian & Mei Li & Scott Montgomery & Bo Fang & Chunfang Wang & Tian Xia & Yang Cao, 2020. "Short-Term Associations of Fine Particulate Matter and Synoptic Weather Types with Cardiovascular Mortality: An Ecological Time-Series Study in Shanghai, China," IJERPH, MDPI, vol. 17(3), pages 1-12, February.
    4. Emily Ying Yang Chan & Tiffany Sze Tung Sham & Tayyab Salim Shahzada & Caroline Dubois & Zhe Huang & Sida Liu & Kevin K.C. Hung & Shelly L.A. Tse & Kin On Kwok & Pui-Hong Chung & Ryoma Kayano & Rajib , 2020. "Narrative Review on Health-EDRM Primary Prevention Measures for Vector-Borne Diseases," IJERPH, MDPI, vol. 17(16), pages 1-28, August.

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