Plasma Insulin as Coronary Heart Disease Risk Factor: Relationship to other Risk Factors and Predictive Value during 9½‐year Follow‐up of the Helsinki Policemen Study Population

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Abstract
In the Helsinki Policemen Study based on a cohort of 982 men aged 35—64 years and free of coronary heart disease (CHD) at entry plasma insulin level (fasting, 1‐hour and 2‐hour plasma insulin after oral glucose load) showed during a 9½‐year follow‐up a nonlinear association to the incidence of »hard criteria» CHD events (CHD death or non‐fatal myocardial infarction) with highest incidence in the top decile of plasma insulin. Plasma insulin levels showed positive correlations, besides to blood glucose levels, to body mass index, plasma triglyceride level and blood pressure and inverse correlations to leisure time physical activity and objectively measured physical fitness. In multivariate analyses the predictive value of high plasma insulin with respect to CHD risk was found to be independent of other risk factors, including blood glucose levels.