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Tuberculosis among institutionalized elderly in Alberta, Canada.

C Macarthur1, D A Enarson, E A Fanning

  • 1Department of Medicine, University of Alberta, Edmonton, Canada.

International Journal of Epidemiology
|December 1, 1992
PubMed
Summary
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Elderly residents in Alberta nursing homes did not show an increased risk of tuberculosis compared to those living in the community. This study found no significant difference in tuberculosis incidence rates between these two groups.

Area of Science:

  • Public Health
  • Epidemiology
  • Infectious Disease

Background:

  • Previous US studies indicated a higher tuberculosis risk for elderly nursing home residents.
  • Data on tuberculosis incidence in Canadian nursing home populations remained limited.

Purpose of the Study:

  • To compare tuberculosis incidence rates between elderly individuals residing in nursing homes and those in community dwellings in Alberta, Canada.
  • To assess the risk of tuberculosis infection in a specific Canadian elderly demographic.

Main Methods:

  • A registry-based study design was employed, analyzing data from 1979 to 1983.
  • Tuberculosis incidence rates were calculated and compared using rate ratios (RR).
  • Adjustments were made for age, sex, and ethnicity to control for confounding variables.

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Main Results:

  • The adjusted rate ratio for tuberculosis in nursing home elderly compared to community elderly was 1.09 (95% CI: 0.38-1.80).
  • No statistically significant increased risk of tuberculosis was observed for elderly individuals in Alberta nursing homes.
  • This finding applied to both all notified cases and culture-positive cases.

Conclusions:

  • Contrary to some previous findings, elderly residents of Alberta nursing homes did not exhibit an elevated risk of tuberculosis.
  • The study suggests that factors contributing to increased tuberculosis risk in nursing homes may vary geographically or be specific to certain populations.