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Serum lipoproteins as risk factors: recent epidemiologic studies in individuals with and without prevalent

H A Tyroler1

  • 1Department of Epidemiology, University of North Carolina, Chapel Hill 27599.

European Heart Journal
|December 1, 1990
PubMed

Insights

High-density lipoprotein (HDL)-cholesterol

Area of Science:

  • Cardiovascular Epidemiology
  • Lipid Metabolism
  • Preventive Cardiology

Background:

  • Previous studies yielded conflicting results on HDL-cholesterol's role in coronary heart disease (CHD) risk.
  • The British Regional Heart Study (BRHS) initially found no significant independent predictive value of HDL-cholesterol for CHD.
  • This prompted a re-evaluation of existing data to reconcile findings.

Purpose of the Study:

  • To systematically re-examine data from four major studies to compare with BRHS findings.
  • To clarify the independent predictive role of HDL-cholesterol for coronary heart disease (CHD).
  • To investigate discrepancies in HDL-cholesterol and CHD mortality rates between different populations.

Main Methods:

  • Comparative analysis of prospective epidemiologic studies: Framingham Heart Study, Lipid Research Clinics (LRC) Prevalence Mortality Follow-up Study, LRC Coronary Primary Prevention Trial, and Multiple Risk Factor Intervention Trial.
  • Analysis of data from the BRHS with extended follow-up.
  • Examination of USSR LRC Follow-up Study data.

Main Results:

  • Three US-based studies and BRHS (with longer follow-up) generally showed higher CHD incidence with low HDL-cholesterol and lower incidence with high HDL-cholesterol.
  • A later BRHS report, without controlling for non-HDL-cholesterol, found a significant, albeit modest, independent predictive role for HDL-cholesterol in CHD.
  • The USSR LRC study showed high CHD mortality despite higher HDL-cholesterol levels compared to US LRC data.

Conclusions:

  • HDL-cholesterol levels are generally inversely associated with coronary heart disease (CHD) risk across multiple studies.
  • The predictive value of HDL-cholesterol for CHD may be influenced by other lipid factors and population-specific characteristics.
  • Further research is needed to understand the complex interplay of HDL-cholesterol, non-HDL-cholesterol, and CHD risk across diverse populations.

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