Key result
Male sibling with premature CHD linked to ~350% higher CHD risk by age 65.
Why the study?
Familial aggregation and risk patterns of coronary heart disease in a high incidence area were assessed to understand hereditary risk factors.
Does a family history of premature coronary heart disease increase the risk of developing coronary heart disease in first-degree relatives?
Population
Families of 211 men under age 56 from East Finland including MI survivors, MI deaths, angina patients, and healthy references
Comparison
Families of men with coronary heart disease vs families of healthy reference men
Design
Case-control study
Authors
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Supports family history assessment in CHD risk evaluation; leaves open whether targeted interventions improve outcomes in high-risk relatives.
Case-Control (n=211)
Does a family history of premature coronary heart disease increase the risk of developing coronary heart disease in first-degree relatives?
Relative Risk: 4.5
There is strong familial aggregation of coronary heart disease, with first-degree relatives of men with premature disease facing a substantially elevated risk of developing CHD, often with similar clinical manifestations.
Aila Rissanen (1979) conducted a case-control in Coronary heart disease (n=211). Family history of premature coronary heart disease vs. Families of healthy reference men was evaluated on Cumulative risk of developing fatal or non-fatal coronary heart disease by age 65 in brothers (RR 4.5). Having a male sibling with premature coronary heart disease was associated with a 4.5-fold increased cumulative risk (70%) of developing fatal or non-fatal coronary heart disease by age 65.
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