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Ambient Temperature and Stroke Occurrence: A Systematic Review and Meta-Analysis

Author

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  • Xia Wang

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia
    Sydney Medical School, the University of Sydney, Sydney, NSW 2006, Australia)

  • Yongjun Cao

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia
    Department of Neurology, the Second Affiliated Hospital of Soochow University, No. 1055, Sanxiang Rd., Suzhou 215004, China)

  • Daqing Hong

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia
    Division of Nephrology, Sichuan Academy of Medical Sciences & Sichuan Provincial People’s Hospital, Chengdu 610072, China)

  • Danni Zheng

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia
    Sydney Medical School, the University of Sydney, Sydney, NSW 2006, Australia)

  • Sarah Richtering

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia)

  • Else Charlotte Sandset

    (Department of Neurology, Oslo University Hospital, Oslo 0424, Norway)

  • Tzen Hugh Leong

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia)

  • Hisatomi Arima

    (Department of Preventive Medicine and Public Health, Faculty of Medicine, Fukuoka University, Fukuoka 814-0180, Japan)

  • Shariful Islam

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia)

  • Abdul Salam

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia)

  • Craig Anderson

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia
    Sydney Medical School, the University of Sydney, Sydney, NSW 2006, Australia)

  • Thompson Robinson

    (Department of Cardiovascular Sciences and NIHR Biomedical Research Unit for Cardiovascular Diseases, University of Leicester, Leicester LE1 7RH, UK)

  • Maree L. Hackett

    (The George Institute for Global Health and Royal Prince Alfred Hospital, the University of Sydney, P.O. Box M201, Missenden Road, Sydney, NSW 2050, Australia
    College of Health and Wellbeing, the University of Central Lancashire, Preston PR1 2HE, UK)

Abstract

Biologically plausible associations exist between climatic conditions and stroke risk, but study results are inconsistent. We aimed to summarize current evidence on ambient temperature and overall stroke occurrence, and by age, sex, and variation of temperature. We performed a systematic literature search across MEDLINE, Embase, PsycINFO, CINAHL, Web of Science, and GEOBASE, from inception to 16 October 2015 to identify all population-based observational studies. Where possible, data were pooled for meta-analysis with Odds ratios (OR) and corresponding 95% confidence intervals (CI) by means of the random effects meta-analysis. We included 21 studies with a total of 476,511 patients. The data were varied as indicated by significant heterogeneity across studies for both ischemic stroke (IS) and intracerebral hemorrhage (ICH). Pooled OR (95% CI) in every 1 degree Celsius increase in ambient temperature was significant for ICH 0.97 (0.94–1.00), but not for IS 1.00 (0.99–1.01) and subarachnoid hemorrhage (SAH) 1.00 (0.98–1.01). Meta-analysis was not possible for the pre-specified subgroup analyses by age, sex, and variation of temperature. Change in temperature over the previous 24 h appeared to be more important than absolute temperature in relation to the risk of stroke, especially in relation to the risk of ICH. Older age appeared to increase vulnerability to low temperature for both IS and ICH. To conclude, this review shows that lower mean ambient temperature is significantly associated with the risk of ICH, but not with IS and SAH. Larger temperature changes were associated with higher stroke rates in the elderly.

Suggested Citation

  • Xia Wang & Yongjun Cao & Daqing Hong & Danni Zheng & Sarah Richtering & Else Charlotte Sandset & Tzen Hugh Leong & Hisatomi Arima & Shariful Islam & Abdul Salam & Craig Anderson & Thompson Robinson & , 2016. "Ambient Temperature and Stroke Occurrence: A Systematic Review and Meta-Analysis," IJERPH, MDPI, vol. 13(7), pages 1-12, July.
    • Handle: RePEc:gam:jijerp:v:13:y:2016:i:7:p:698-:d:73750
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    References listed on IDEAS

    as
    1. Hui Lian & Yanping Ruan & Ruijuan Liang & Xiaole Liu & Zhongjie Fan, 2015. "Short-Term Effect of Ambient Temperature and the Risk of Stroke: A Systematic Review and Meta-Analysis," IJERPH, MDPI, vol. 12(8), pages 1-21, July.
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    Cited by:

    1. Germaine Cornelissen Guillaume & Denis Gubin & Larry A Beaty & Kuniaki Otsuka, 2020. "Some Near- and Far-Environmental Effects on Human Health and Disease with a Focus on the Cardiovascular System," IJERPH, MDPI, vol. 17(9), pages 1-16, April.
    2. Geraldine P. Y. Koo & Huili Zheng & Joel C. L. Aik & Benjamin Y. Q. Tan & Vijay K. Sharma & Ching Hui Sia & Marcus E. H. Ong & Andrew F. W. Ho, 2023. "Clustering of Environmental Parameters and the Risk of Acute Ischaemic Stroke," IJERPH, MDPI, vol. 20(6), pages 1-10, March.

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