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Relation between blood pressure and stroke mortality.

A J Palmer1, C J Bulpitt, A E Fletcher

  • 1Hammersmith Hospital, London, England.

Hypertension (Dallas, Tex. : 1979)
|November 1, 1992
PubMed
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High blood pressure significantly increases stroke mortality risk in hypertensive patients. Even small increases in systolic and diastolic blood pressure, both treated and untreated, are linked to higher stroke death rates.

Area of Science:

  • Cardiovascular Medicine
  • Epidemiology
  • Hypertension Research

Background:

  • Hypertension is a major risk factor for stroke mortality.
  • Understanding the precise relationship between blood pressure levels and stroke death is crucial for public health.
  • Longitudinal studies are essential to establish causal links and quantify risks.

Purpose of the Study:

  • To investigate the association between untreated and treated blood pressure levels and stroke mortality in a large cohort of hypertensive patients.
  • To quantify the increased risk of stroke death per unit increase in systolic and diastolic blood pressure.
  • To examine potential differences in this relationship based on age and sex.

Main Methods:

  • Analysis of data from 10,186 hypertensive patients followed for an average of 9 years.

Related Experiment Videos

  • Inclusion of both untreated and treated blood pressure measurements.
  • Age-adjusted statistical analysis to determine relative hazard rates for stroke mortality.

    • Main Results:

    • A 1 mm Hg increase in untreated systolic blood pressure correlated with a 1% increase in stroke mortality risk for both men and women.
    • Untreated diastolic blood pressure increases showed a ~3% risk increase in men and 1% in women per 1 mm Hg.
    • Treated systolic and diastolic blood pressure increases were associated with 2% and 3% higher stroke mortality, respectively, per 1 mm Hg.

    Conclusions:

    • Elevated blood pressure, whether treated or untreated, is a significant predictor of stroke mortality in hypertensive individuals.
    • The risk of stroke death increases consistently with higher blood pressure readings.
    • While age and treatment status modify the risk slightly, the overall association between blood pressure and stroke mortality remains robust.