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Border crossing for hospital care and its implications for the use of statewide data

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  • Yip, Winnie
  • Luft, Harold S.

Abstract

A major concern of researchers using state data sets for population-based analyses and market share studies in the health care sector is the potential bias caused by 'border crossing'--patients receiving care out of state. By using the Health Care Financing Administration (HCFA) discharge abstract files for 1987 and 1988, we found that 'border crossing' is not a serious problem for the two large states we examined. Only 4.4% of New York patients and 2.15% of California patients received care out of state. At the county and zip code level, 'border crossing' is more frequent but tends to be concentrated in areas adjacent to other states. Even excluding all zips with more than 10% of patients crossing the 'border' results in a small loss of patients (2.2% for New York and 1.0% for California).

Suggested Citation

  • Yip, Winnie & Luft, Harold S., 1993. "Border crossing for hospital care and its implications for the use of statewide data," Social Science & Medicine, Elsevier, vol. 36(11), pages 1455-1465, June.
    • Handle: RePEc:eee:socmed:v:36:y:1993:i:11:p:1455-1465
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    Cited by:

    1. Dunn, Abe & Knepper, Matthew & Dauda, Seidu, 2021. "Insurance expansions and hospital utilization: Relabeling and reabling?," Journal of Health Economics, Elsevier, vol. 78(C).

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