Occupation, education, and coronary heart disease. Risk is influenced more by education and background than by occupational experiences, in the Bell System.
D000328:Adult; D000704:Analysis of Variance; D000787:Angina Pectoris / Q000453:epidemiology; D003142:Communication; D003327:Coronary Disease / Q000453:epidemiology* / Q000401:mortality; D004522:Educational Status; D006306:Health Surveys; D006331:Heart Diseases / Q000453:epidemiology; D006801:Humans; D008875:Middle Aged; D009017:Morbidity; D009203:Myocardial Infarction / Q000453:epidemiology; D009790:Occupations; D011446:Prospective Studies; D011676:Punched-Card Systems; D012937:Social Mobility