THE H.I.P. STUDY OF INCIDENCE AND PROGNOSIS OF CORONARY HEART DISEASE; PRELIMINARY FINDINGS ON INCIDENCE OF MYOCARDIAL INFARCTION AND ANGINA.

Abstract

Abstract Preliminary findings in the H.I.P. study of incidence and prognosis of CHD have been presented. The data shown are restricted to incidence of MI and angina as related to age and sex, smoking practices, and physical activities on the job and off the job. Comparisons are made between the results of the H.I.P. study and those of other studies, principally the Framingham and Albany studies, when data are available. Age-sex differentials in MI rates obtained in the H.I.P. study are similar to those observed in other studies except for a comparatively small increase between ages 45–54 and 55–64 years in the MI rates for men. Age-sex rates for angina are lower in the H.I.P. study than in the other investigations. The association between cigarette smoking and MI among men reported by the Framingham and Albany investigators was observed in the current study. A similar association was detected for women. The H.I.P. study also found an association among men between cigarette smoking and angina. In the other studies no such association was detected. Physical activities off the job and on the job have been combined to form a three class gradient of ‘light’, ‘intermediate’ and ‘heavy’ activities. Men with ‘light’ physical Activities have an elevated risk for MI; men with ‘heavy’ physical activities seem to have a comparatively high risk for angina. No directly comparable data are available from other studies.