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Assessing hypertension in the Canadian Study of Health and Aging

H S Davis1, H R Merry, C MacKnight

  • 1Division of Geriatric Medicine, Dalhousie University, Halifax, Nova Scotia, Canada.

International Psychogeriatrics
|March 15, 2002
PubMed

Insights

The Self-Administered Risk Factor (SARF) questionnaire better assesses hypertension risks than the CSHA screening questionnaire. SARF data indicates hypertension treatment impacts survival, even for those without diagnosed high blood pressure.

Area of Science:

  • Epidemiology and Public Health
  • Cardiovascular Disease Research

Background:

  • Accurate self-reporting of hypertension is crucial for epidemiological studies and risk assessment.
  • Existing questionnaires may vary in their ability to capture comprehensive hypertension data, including treatment status.

Purpose of the Study:

  • To compare the utility of the Canadian Study of Health and Aging (CSHA) screening questionnaire and the Self-Administered Risk Factor (SARF) questionnaire in assessing self-reported hypertension.
  • To evaluate the association of self-reported hypertension variables with other cardiovascular conditions and mortality.
  • To determine the impact of hypertension treatment on survival rates.

Main Methods:

  • Analysis of self-report hypertension data from the CSHA and SARF questionnaires.
  • Assessment of agreement between the two questionnaires using the phi coefficient.
  • Statistical analysis of associations between hypertension variables, heart disease, stroke, and subsequent mortality.
  • Survival analysis controlling for hypertension treatment effects.

Main Results:

  • High agreement (phi coefficient 0.83) was observed between the CSHA and SARF hypertension questions.
  • Both self-report measures were significantly associated with concurrent heart disease/stroke and subsequent mortality.
  • Survival was shortest for individuals with no reported hypertension but receiving antihypertensive medications for other conditions, compared to those with no hypertension and no treatment.

Conclusions:

  • The SARF questionnaire, by including questions on high blood pressure and treatment, is preferable for assessing hypertension-related risks.
  • Hypertension treatment status is an important factor influencing survival, even in individuals not explicitly reporting high blood pressure.
  • Accurate and comprehensive hypertension assessment is vital for understanding cardiovascular disease risks and outcomes.

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