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Validation of a new continuous geographic isolation scale: A tool for rural health disparities research

Author

Listed:
  • Doogan, Nathan J.
  • Roberts, Megan E.
  • Wewers, Mary Ellen
  • Tanenbaum, Erin R.
  • Mumford, Elizabeth A.
  • Stillman, Frances A.

Abstract

The purpose of this study was to develop and test a new continuous measure for rural health disparities research that characterizes geographic areas according to a perspective of access to resources. We call the measure Isolation and anticipate it will be useful as an alternative to commonly used rural classification schemes (e.g., the Census Bureau's measure). Following the best known standards for measuring rurality, it captures the trade-off between access to resource-rich, high-population-density areas and the cost of travel to those areas; thus even intrinsically low-resource areas may have high access to nearby resources. Validity was tested with proxies such as distance to hospitals, physician availability, and access to high quality food. The Isolation scale demonstrated good construct validity (i.e., both convergent and criterion validity). Fit statistics indicated that, compared to other commonly-used urban/rural definitions, the Isolation scale was the best overall measure when predicting several proxies for rurality, even when categorized. We also show that the measure does a substantially better job at explaining national health outcome data at the state level. This new continuous Isolation scale shows considerable promise for improving our conceptualization, theorization, and measurement of the features of rurality that are pertinent to rural health disparities research, and can also be useful to policy makers who may find value in using isolation thresholds that are most relevant to their policy planning needs.

Suggested Citation

  • Doogan, Nathan J. & Roberts, Megan E. & Wewers, Mary Ellen & Tanenbaum, Erin R. & Mumford, Elizabeth A. & Stillman, Frances A., 2018. "Validation of a new continuous geographic isolation scale: A tool for rural health disparities research," Social Science & Medicine, Elsevier, vol. 215(C), pages 123-132.
    • Handle: RePEc:eee:socmed:v:215:y:2018:i:c:p:123-132
    DOI: 10.1016/j.socscimed.2018.09.005
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    References listed on IDEAS

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    1. Hartley, D., 2004. "Rural health disparities, population health, and rural culture," American Journal of Public Health, American Public Health Association, vol. 94(10), pages 1675-1678.
    2. Hart, L.G. & Larson, E.H. & Lishner, D.M., 2005. "Rural definitions for health policy and research," American Journal of Public Health, American Public Health Association, vol. 95(7), pages 1149-1155.
    3. Scheil-Adlung, Xenia., 2015. "Global evidence on inequities in rural health protection : new data on rural deficits in health coverage for 174 countries," ILO Working Papers 994876213402676, International Labour Organization.
    4. Cromartie, John & Bucholtz, Shawn, 2008. "Defining the "Rural" in Rural America," Amber Waves:The Economics of Food, Farming, Natural Resources, and Rural America, United States Department of Agriculture, Economic Research Service, pages 1-8, June.
    5. Caldwell, J.T. & Ford, C.L. & Wallace, S.P. & Wang, M.C. & Takahashi, L.M., 2016. "Intersection of living in a rural versus urban area and race/ethnicity in explaining access to health care in the United States," American Journal of Public Health, American Public Health Association, vol. 106(8), pages 1463-1469.
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