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Serum cholesterol, other risk factors, and cardiovascular disease in a Japanese cohort
Insights
Serum cholesterol and blood pressure strongly predict coronary heart disease (CHD) incidence, with both short-term and long-term effects observed. Other risk factors played a lesser role in this Hiroshima and Nagasaki cohort study.
Area of Science:
- Epidemiology
- Cardiovascular Disease Research
- Public Health
Background:
- Cardiovascular disease (CVD) remains a leading cause of mortality worldwide.
- Understanding the interplay of risk factors like serum cholesterol and blood pressure is crucial for prevention strategies.
- Longitudinal cohort studies provide valuable insights into disease pathogenesis and risk prediction.
Purpose of the Study:
- To investigate the long-term relationship between serum cholesterol, blood pressure, and other risk factors with cardiovascular disease incidence.
- To examine both short-term and long-term effects of serum cholesterol on coronary heart disease (CHD).
- To analyze the association of these risk factors with specific cardiovascular events: CHD, cerebral infarction (CI), and cerebral hemorrhage (CH).
Main Methods:
- A 16-year cohort study involving 16,711 residents of Hiroshima and Nagasaki.
- Analysis of baseline and biennially collected risk factor data, including serum cholesterol, systolic and diastolic blood pressure.
- Multivariate analyses incorporating additional risk factors such as smoking, diabetes, left ventricular hypertrophy, body weight, hematocrit, and proteinuria.
Main Results:
- Serum cholesterol and blood pressure demonstrated strong associations with CHD incidence, affecting both short-term and long-term outcomes independently.
- Blood pressure was a strong correlate for cerebral infarction (CI) and cerebral hemorrhage (CH), while serum cholesterol showed weak or no association.
- A potential statistical interaction between blood pressure and serum cholesterol was observed for CI.
Conclusions:
- Serum cholesterol and blood pressure are significant predictors of CHD, with distinct short-term and long-term impacts.
- Blood pressure is a more critical risk factor for cerebrovascular events (CI, CH) than serum cholesterol in this population.
- Findings have implications for refining disease pathogenesis theories and informing public health interventions for cardiovascular disease prevention.
Abstract:
The relationship of serum cholesterol and other risk factors to cardiovascular disease was investigated in a 16-year cohort of 16,711 residents of Hiroshima and Nagasaki. Examined in detail were the relationship of serum cholesterol, and the joint relationships of serum cholesterol, systolic blood pressure, diastolic blood pressure, and other risk factors to coronary heart disease (CHD), cerebral infarction (CI), and cerebral hemorrhage (CH). Baseline and biennially collected risk factor data were analyzed. The latter type of measurement permitted separate investigation of both the short-term and long-term effects of cholesterol measurements. In both types of analyses, both serum cholesterol and blood pressure showed strong associations with CHD incidence. In particular, there were strong associations with short-term and delayed CHD incidence. Furthermore, the association of cholesterol with short-term CHD incidence could not be explained by its association with delayed CHD incidence, or vice versa. Multivariate analyses that also included several other risk factors (smoking habits, clinical diagnosis of diabetes mellitus, left ventricular hypertrophy or strain on electrocardiogram, relative body weight, hematocrit, and proteinuria) for which data were available showed such risk factors to be of lesser, but generally non-negligible, importance in this population. In the case of CH and CI, serum cholesterol was found to be weakly or not at all related to incidence of either disease while blood pressure remained a strong correlate. For CI some suggestion of a statistical interaction between blood pressure and serum cholesterol was found. Discussed are implications for theories of disease pathogenesis for CHD, CI and CH.