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The occurrence of new coronary heart disease (CHD) in the presence of below average serum levels of lipids and lipoproteins was studied during a 4 1/2-year period of observation of 2,998 normotensive men, aged 39 to 59 years at intake into a prospective, epidemiological investigation. It was found from this study that the normotensive, middle-aged man with thefully developedtype B behavior pattern was essentially immune to the development of clinical CHD if he exhibited a serum cholesterol level less than 226 mg/100 ml, a serum triglyceride level less than 126 mg/100 ml, or a serum β-/α-lipoprotein ratio less than 2.01, singly or in combination.
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Ray H. Rosenman (1966) studied this question.
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