Risk factors in middle age that predict early and late onset of coronary heart disease

R J Benfante1, D M Reed, C J MacLean

  • 1Honolulu Heart Program, Kuakini Medical Center, HI 96817.

Insights

Serum triglyceride uniquely predicts early coronary heart disease (CHD) onset. While smoking impacts both early and late CHD, other factors like blood pressure and cholesterol affect both similarly, highlighting varied risk factor influences.

Area of Science:

  • Cardiovascular Medicine
  • Epidemiology
  • Preventive Cardiology

Background:

  • Coronary heart disease (CHD) risk factors are well-established, but their differential impact on early versus late onset remains less understood.
  • Understanding distinct predictors for premature versus later-life CHD is crucial for targeted prevention strategies.
  • Previous research shows inconsistencies regarding the role of certain risk factors, such as serum triglyceride levels, in CHD development.

Purpose of the Study:

  • To investigate differences in the predictive power of biological and lifestyle characteristics for early-onset versus late-onset coronary heart disease (CHD).
  • To identify specific risk factors associated with premature CHD (under age 60) compared to later-life CHD (age 60 and over).
  • To clarify the role of serum triglyceride as an independent predictor of CHD onset timing.

Main Methods:

  • Analysis of twelve biological and lifestyle characteristics in 5919 middle-aged men initially free of CHD, stroke, and cancer.
  • A 12-year follow-up period to track the incidence of definite CHD (non-fatal myocardial infarction and fatal CHD).
  • Statistical analysis to compare the predictive value of risk factors for early (under 60) and late (60 and over) CHD onset groups.

Main Results:

  • Serum triglyceride was the sole independent predictor for early-onset CHD, not associated with late-onset disease.
  • Cigarette smoking predicted both early and late CHD, with a greater effect on earlier onset.
  • Systolic blood pressure, alcohol intake, serum cholesterol, and serum glucose independently predicted both onset groups similarly.

Conclusions:

  • Specific risk factors, notably serum triglyceride, can influence the timing of coronary heart disease (CHD) onset differently.
  • Findings suggest serum triglyceride's role in early CHD may explain previous inconsistencies in its classification as an independent risk factor.
  • Most studied characteristics remain important for preventing both premature and late-onset CHD, emphasizing comprehensive risk factor management.

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