Sixty male survivors of acute myocardial infarction in the week after the Chicago blizzard of Jan 15, 1979, were matched by hospital and sex with 60 myocardial infarction survivors from a week without snowfall to determine whether a history of previous heart disease or of cardiac risk factors increased the risk of a postblizzard myocardial infarction. Cases did not differ significantly from control subjects with respect to age, percentage working full time, or percentage with a history of heart disease, hypertension, smoking, diabetes mellitus, obesity, or gout. Hypercholesterolemia was four times as common among cases as among controls.
Glass RI, Wiesenthal AM, Zack MM, Preston M. Risk Factors for Myocardial Infarction Associated With the Chicago Snowstorm of Jan 13-15, 1979. JAMA. 1981;245(2):164–165. doi:10.1001/jama.1981.03310270044023
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