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County-Level Life Expectancy Change: A Novel Metric for Monitoring Public Health

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  • Aruna Chandran

    (Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
    Current address: 615 N. Wolfe Street, W6501, Baltimore, MD 21205, USA.)

  • Ritika Purbey

    (Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA)

  • Kathryn M. Leifheit

    (Department of Health Policy and Management, UCLA Fielding School of Public Health, Los Angeles, CA 90095, USA)

  • Kirsten McGhie Evans

    (Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA)

  • Jocelyn Velasquez Baez

    (Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA)

  • Keri N. Althoff

    (Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA)

Abstract

Life expectancy (LE) is a core measure of population health. Studies have confirmed the predictive importance of modifiable determinants on LE, but less is known about their association with LE change over time at the US county level. In addition, we explore the predictive association of LE change with COVID-19 mortality. We used a linear regression model to calculate county-level annual LE change from 2011 to 2016, and categorized LE change (≤−0.1 years change per year as decreasing, ≥0.1 years as increasing, otherwise no change). A multinomial regression model was used to determine the association between modifiable determinants of health indicators from the County Health Rankings and LE change. A Poisson regression model was used to evaluate the relationship between change in life expectancy and COVID-19 mortality through September 2021. Among 2943 counties, several modifiable determinants of health were significantly associated with odds of being in increasing LE or decreasing LE counties, including adult smoking, obesity, unemployment, and proportion of children in poverty. The presence of an increasing LE in 2011–2016, as compared to no change, was significantly associated with a 5% decrease in COVID-19 mortality between 2019 and 2021 (β = 0.953, 95% CI: 0.943, 0.963). We demonstrated that change in LE at the county level is a useful metric for tracking public health progress, measuring the impact of public health initiatives, and gauging preparedness and vulnerability for future public health emergencies.

Suggested Citation

  • Aruna Chandran & Ritika Purbey & Kathryn M. Leifheit & Kirsten McGhie Evans & Jocelyn Velasquez Baez & Keri N. Althoff, 2022. "County-Level Life Expectancy Change: A Novel Metric for Monitoring Public Health," IJERPH, MDPI, vol. 19(17), pages 1-9, August.
  • Handle: RePEc:gam:jijerp:v:19:y:2022:i:17:p:10672-:d:899117
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    References listed on IDEAS

    as
    1. Dobis, Elizabeth A. & Stephens, Heather M. & Skidmore, Mark & Goetz, Stephan J., 2020. "Explaining the spatial variation in American life expectancy," Social Science & Medicine, Elsevier, vol. 246(C).
    2. Anne Case & Angua Deaton, 2015. "Rising morbidity and mortality in midlife among white non-Hispanic Americans in the 21st century," Working Papers 15078.full.pdf, Princeton University, Woodrow Wilson School of Public and International Affairs, Research Program in Development Studies..
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