![]() Where opinions differed, decision as to diagnosis rested with the senior investigator (O.P.), who undertook an additional interview and physical examination. The diagnosis of myocardial infarction was based on the clinical history plus characteristic electrocardiographic findings. ![]() The diagnosis of Heberden’s angina was based on published criteria, and required the concurrence of two or more internists in each case. Additional data on diet, personality, social status, and pulmonary function were obtained at the second, third, and fourth annual examinations. Men continuing in the study were re-examined and medical histories updated annually through 1969, primarily to detect incident cases of CHD. No prescriptive care was given, but results were sent to personal physicians with the participant’s consent. Initial examinations, conducted from October 1957 to December 1958, included a detailed family and medical history, complete physical examination, 12-lead plus V4R ECG, chest x-ray, urinalysis, and measurements of blood hemoglobin, serum total cholesterol, serum lipoprotein lipase (the measurements of which were subsequently determined to be invalid), height, weight, subscapular and triceps skinfold thicknesses, somatotype by Sheldon’s method, diet by Burke’s method, personality using the Minnesota Multiphasic Personality Inventory, physical activity on the job according to codes developed by the Company for each occupation, and physical activity away from work using a questionnaire method (subsequently deemed insufficiently reliable). About 75% were first- or second-generation Americans of German, Polish or Bohemian ancestry while most of the remaining participants were descendants of earlier immigrants from the British Isles. ![]() The group included white- and blue-collar occupations associated with the manufacture of telephonic equipment. Ī sample of 3,102 men was randomly selected from the population of men 40-55 years of age and employed for at least 2 years at the Hawthorne Works of the Western Electric Company near Chicago. The Chicago Western Electric Study was initiated in 1957 by Oglesby Paul to identify factors associated with risk of CHD. Diet-Heart: Hypothesis to Theory to Practice to Policy.Sir Ronald Fisher and his “Millionaire” Calculator.Early CVD Methods Conferences (AHA-NIH).CVD Epidemiology Leads the Way in Data Handling.
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