Type A Behavior and Survival after Acute Myocardial Infarction

To ascertain the influence of personality factors on the course of coronary artery disease, we measured Type A behavior in 516 patients within two weeks after an acute myocardial infarction, using the Jenkins Activity Survey questionnaire. Over a follow-up period of one to three years, there was no relation between the Type A score and total mortality, cardiac mortality, time to death for nonsurvivors, left ventricular ejection fraction, or duration of the stay in the coronary care unit. These negative findings were not changed by restricting the analyses to men below 61 years of age or by comparing extreme score categories. The contributions of behavioral, demographic, and cardiac physiologic factors to postinfarction mortality were also evaluated by multivariate survivorship analyses. The physiologic factors were the only ones that contributed a significant and independent mortality risk; the Type A score did not enter the survivorship model (relative risk, 0.8; 95 per cent confidence interval, 0.5 to 1.5). Thus, we found no relation between Type A behavior and the long-term outcome of acute myocardial infarction.