Urban heat island impacts on heat-related cardiovascular morbidity: A time series analysis of older adults in US metropolitan areas

被引:23
作者
Cleland, Stephanie E. [1 ,2 ]
Steinhardt, William [2 ]
Neas, Lucas M.
West, J. Jason [1 ]
Rappold, Ana G. [3 ,4 ]
机构
[1] Univ N Carolina, Gillings Sch Global Publ Hlth, Dept Environm Sci & Engn, Chapel Hill, NC USA
[2] US EPA, Oak Ridge Inst Sci & Educ, Ctr Publ Hlth & Environm Assessment, Off Res & Dev, Res Triangle Pk, NC USA
[3] US EPA, Ctr Publ Hlth & Environm Assessment, Off Res & Dev, Res Triangle Pk, NC USA
[4] US EPA, Human Studies Facil, 104 Mason Farm Rd, Chapel Hill, NC 27514 USA
关键词
Urban heat island; Extreme heat; Cardiovascular disease; Hospitalization; United States; Medicare; AMBIENT-TEMPERATURE; HOSPITAL ADMISSIONS; UNITED-STATES; MYOCARDIAL-INFARCTION; AIR-TEMPERATURE; CLIMATE-CHANGE; EXTREME HEAT; MORTALITY; VULNERABILITY; POPULATION;
D O I
10.1016/j.envint.2023.108005
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Many United States (US) cities are experiencing urban heat islands (UHIs) and climate change-driven temperature increases. Extreme heat increases cardiovascular disease (CVD) risk, yet little is known about how this association varies with UHI intensity (UHII) within and between cities. We aimed to identify the urban populations most at-risk of and burdened by heat-related CVD morbidity in UHI-affected areas compared to unaffected areas. ZIP code-level daily counts of CVD hospitalizations among Medicare enrollees, aged 65-114, were obtained for 120 US metropolitan statistical areas (MSAs) between 2000 and 2017. Mean ambient temperature exposure was estimated by interpolating daily weather station observations. ZIP codes were classified as low and high UHII using the first and fourth quartiles of an existing surface UHII metric, weighted to each have 25% of all CVD hospitalizations. MSA-specific associations between ambient temperature and CVD hospitalization were estimated using quasi-Poisson regression with distributed lag non-linear models and pooled via multivariate meta-analyses. Across the US, extreme heat (MSA-specific 99th percentile, on average 28.6 degrees C) increased the risk of CVD hospitalization by 1.5% (95% CI: 0.4%, 2.6%), with considerable variation among MSAs. Extreme heatrelated CVD hospitalization risk in high UHII areas (2.4% [95% CI: 0.4%, 4.3%]) exceeded that in low UHII areas (1.0% [95% CI: -0.8%, 2.8%]), with upwards of a 10% difference in some MSAs. During the 18-year study period, there were an estimated 37,028 (95% CI: 35,741, 37,988) heat-attributable CVD admissions. High UHII areas accounted for 35% of the total heat-related CVD burden, while low UHII areas accounted for 4%. High UHII disproportionately impacted already heat-vulnerable populations; females, individuals aged 75-114, and those with chronic conditions living in high UHII areas experienced the largest heat-related CVD impacts. Overall, extreme heat increased cardiovascular morbidity risk and burden in older urban populations, with UHIs exacerbating these impacts among those with existing vulnerabilities.
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页数:13
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