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County-level variation in healthcare coverage and ischemic heart disease mortality

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  • Ramzi Ibrahim
  • Adam Habib
  • Kristina Terrani
  • Soumiya Ravi
  • Chelsea Takamatsu
  • Mohammed Salih
  • João Paulo Ferreira

Abstract

Background: Healthcare coverage has been shown to have implications in the prevalence of coronary artery disease. We explore the impact of lack of healthcare coverage on ischemic heart disease (IHD) mortality in the US. Methods: We obtained county-level IHD mortality and healthcare coverage data from the CDC databases for a total of 3,119 US counties. The age-adjusted prevalence of current lack of health insurance among individuals aged 18 to 64 years were obtained for the years 2018 and 2019 and were placed into four quartiles. First (Q1) and fourth quartile (Q4) had the least and highest age-adjusted prevalence of adults without health insurance, respectively. IHD mortality rates, adjusted for age through the direct method, were obtained for the same years and compared among quartiles. Ordinary least squares (OLS) regression for each demographic variable was conducted with the quartiles as an ordinal predictor variable and the age-adjusted mortality rate as the outcome variable. Results: We identified a total of 172,942 deaths related to ischemic heart disease between 2018 and 2019. Overall AAMR was higher in Q4 (92.79 [95% CI, 92.35–93.23]) compared to Q1 (83.14 [95% CI, 82.74–83.54]), accounting for 9.65 excess deaths per 100,000 person-years (slope = 3.47, p = 0.09). Mortality rates in Q4 for males (126.20 [95% CI, 125.42–126.98] and females (65.57 [95% CI, 65.08–66.05]) were higher compared to Q1 (115.72 [95% CI, 114.99–116.44] and 57.48 [95% CI, 57.04–57.91], respectively), accounting for 10.48 and 8.09 excess deaths per 100,000 person-years for males and females, respectively. Similar trends were seen among Hispanic and non-Hispanic populations. Northeastern, Southern, and Western regions had higher AAMR within Q4 compared to Q1, with higher prevalence of current lack of health insurance accounting for 49.2, 8.15, and 29.04 excess deaths per 100,000 person-years, respectively. Conclusion: A higher prevalence of adults without healthcare coverage may be associated with increased IHD mortality rates. Our results serve as a hypothesis-generating platform for future research in this area.

Suggested Citation

  • Ramzi Ibrahim & Adam Habib & Kristina Terrani & Soumiya Ravi & Chelsea Takamatsu & Mohammed Salih & João Paulo Ferreira, 2024. "County-level variation in healthcare coverage and ischemic heart disease mortality," PLOS ONE, Public Library of Science, vol. 19(1), pages 1-11, January.
    • Handle: RePEc:plo:pone00:0292167
    DOI: 10.1371/journal.pone.0292167
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    References listed on IDEAS

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    1. Liying Song & Yan Wang & Baodong Chen & Tan Yang & Weiliang Zhang & Yafeng Wang, 2020. "The Association between Health Insurance and All-Cause, Cardiovascular Disease, Cancer and Cause-Specific Mortality: A Prospective Cohort Study," IJERPH, MDPI, vol. 17(5), pages 1-11, February.
    2. Heeju Sohn, 2017. "Racial and Ethnic Disparities in Health Insurance Coverage: Dynamics of Gaining and Losing Coverage Over the Life-Course," Population Research and Policy Review, Springer;Southern Demographic Association (SDA), vol. 36(2), pages 181-201, April.
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