Risk factors for coronary heart disease: a case-control study

Area of Science:

• Cardiology
• Epidemiology
• Public Health

Background:

• Myocardial infarction (MI) and sudden cardiac death (SCD) are leading causes of mortality.
• Identifying modifiable risk factors is crucial for prevention strategies.

Purpose of the Study:

• To investigate the association between various risk factors and the incidence of MI and SCD in a Caucasian population.
• To quantify the population-attributable risk for identified factors.

Main Methods:

• A population-based case-control study was conducted using data from a coronary disease register and electoral roll.
• Cases included 625 MI and 185 SCD events; 1586 controls aged 35-64 years were included.
• Risk factors analyzed: hypertension treatment history, smoking, body mass index, serum cholesterol, and vasectomy history (men).

Main Results:

• Hypertension treatment history and cigarette smoking were independently associated with more than double the risk of MI and SCD in both sexes.
• Very high body mass index increased MI risk in men and women; high serum cholesterol increased MI risk in men.
• Hypertension and smoking were attributable to approximately 50% of MI events and over 50% of SCD events.

Conclusions:

• Hypertension and cigarette smoking are major modifiable risk factors for myocardial infarction and sudden cardiac death.
• Effective public health interventions targeting these risk factors could significantly reduce cardiovascular mortality.
• High body mass index and elevated serum cholesterol also contribute to MI risk, particularly in men.