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Hypertension after Intersalt: prospects for prevention.

T C Beard1

  • 1Menzies Centre for Population Health Research, University of Tasmania, Australia.

Journal of Cardiovascular Pharmacology
|January 1, 1990
PubMed
Summary
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This study analyzed Intersalt data to assess sodium (Na) excretion and blood pressure (BP) prevalence. Lowering Na intake to under 40 mmol/day may prevent hypertension and age-related BP rise.

Area of Science:

  • Epidemiology
  • Public Health
  • Nutritional Science

Background:

  • Statistical analysis of Intersalt data improved population and age group comparisons.
  • Previous analyses focused on blood pressure (BP) distribution, not hypertension prevalence.
  • The relationship between mean BP changes and hypertension prevalence requires further illustration.

Purpose of the Study:

  • To re-evaluate the Intersalt data focusing on hypertension prevalence in relation to sodium (Na) excretion.
  • To determine optimal Na excretion levels for preventing hypertension and age-related BP increase.
  • To assess the protective effects of intermediate Na excretion ranges in conjunction with a healthy lifestyle.

Main Methods:

  • Utilized advanced statistical methods for analyzing Intersalt data.

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  • Focused on the relationship between Na excretion rates and BP prevalence.
  • Employed graphical analysis plotting prevalence against log Na excretion.

    • Main Results:

    • Na excretion rates exceeding 100 mmol/day are not recommended.
    • Na excretion below 40 mmol/day is suggested to prevent hypertension and mitigate age-related BP rise.
    • Intermediate Na excretion ranges (40-100 or 50-100 mmol/day) show protective potential with a healthy lifestyle and balanced Na/K ratio (≤1.0).

    Conclusions:

    • Sodium intake significantly impacts hypertension prevalence.
    • Public health targets for Na excretion should consider preventing hypertension and age-related BP increase.
    • A balanced Na/K ratio, alongside reduced Na intake, is crucial for cardiovascular health.