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Inter-area variations in age-adjusted health status.

M S Blumberg1

  • 1Kaiser Foundation Health Plan, Inc., Oakland, CA 94612.

Medical Care
|April 1, 1987
PubMed
Summary

Geographic location significantly impacts health status and hospital use, challenging the use of age alone for comparisons. Morbidity varies greatly by region and residence, affecting healthcare utilization.

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Area of Science:

  • Public Health
  • Health Services Research
  • Epidemiology

Background:

  • Morbidity data from the National Health Interview Survey (1980-1981) is analyzed.
  • Previous understanding of regional health status and hospital use is limited.
  • Small area variations in healthcare utilization are not well-documented.

Purpose of the Study:

  • To investigate geographic variations in morbidity and hospital use across the United States.
  • To assess the reliability of age as a proxy for health status in comparing populations.
  • To examine inter-city differences in health status and hospital utilization.

Main Methods:

  • Age standardization of morbidity data, focusing on bed-disability days.
  • Analysis indexed by U.S. region and metropolitan/nonmetropolitan residence.
  • Examination of hospital days as a percentage of bed-disability days.
  • Age- and morbidity-adjusted analysis for 31 largest Standard Metropolitan Statistical Areas (SMSAs).

Main Results:

  • Substantial differences in age-specific and age-adjusted morbidity were found based on place of residence.
  • Significant geographic variations existed in age-specific hospital days as a percent of bed-disability days.
  • Large variations in bed-disability days and in-hospital proportion of these days were observed across the 31 SMSAs.
  • Age-adjusted data revealed significant differences in health status and hospital use between different locales.

Conclusions:

  • Age is an unreliable proxy for health status when comparing hospital use across different geographic populations.
  • Place of residence is a significant factor influencing both morbidity and healthcare utilization.
  • Findings challenge assumptions about uniform healthcare needs and use based solely on age demographics.
  • Small area variations in health status and hospital use necessitate more nuanced analytical approaches.

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