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Income, race, and mortality

T Sterling1, W Rosenbaum, J Weinkam

  • 1School of Computing Science, Faculty of Applied Sciences, Simon Fraser University, Burnaby, BC, Canada.

Journal of the National Medical Association
|December 1, 1993
PubMed
Summary
This summary is machine-generated.

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Poverty significantly increases disease-specific mortality across all causes, including cancer and heart disease. Racial disparities in mortality largely disappear when income levels are considered, suggesting poverty is a key driver.

Area of Science:

  • Public Health
  • Epidemiology
  • Socioeconomic Determinants of Health

Background:

  • Poverty and race are known social determinants of health.
  • Existing research suggests a link between socioeconomic status and disease-specific mortality.

Purpose of the Study:

  • To investigate the relationship between poverty, race, and disease-specific mortality.
  • To determine if racial differences in mortality are explained by income disparities.

Main Methods:

  • Utilized data from the 1987 National Health Interview Survey and 1986 National Mortality Followback Survey.
  • Calculated standardized mortality ratios (SMRs) for various causes of death based on income levels.
  • Compared SMRs between racial groups, adjusting for factors like alcohol, occupation, and smoking.

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Main Results:

  • Substantially elevated SMRs were observed for individuals below the poverty line across all studied mortality categories.
  • Adjustments for alcohol, occupation, or smoking did not significantly alter the elevated SMRs associated with poverty.
  • Sex-specific mortality for Black individuals relative to White individuals was elevated, particularly for males, except for ischemic heart disease.
  • When adjusted for family per capita income, Black mortality did not significantly exceed White mortality.

Conclusions:

  • Mortality differences between Black and White populations are strongly linked to income disparities and associated socioeconomic factors.
  • Poverty is a significant predictor of elevated disease-specific mortality.
  • The specific mechanisms linking poverty to increased cancer relative risk remain unclear.