A prospective study of the Jenkins Activity Survey as a risk indicator for coronary heart disease in the Netherlands

Type A behavior was assessed in Rotterdam in 3171 males, aged 45-59 years, by the Jenkins Activity Survey (JAS) as part of the Kaunas-Rotterdam Intervention Study (KRIS). During a follow-up period of 9 1/2 years, 112 fatal and 157 non-fatal cases of myocardial infarction occurred. The JAS did not predict future cases of fatal or non-fatal myocardial infarction. Persons scoring highest on the hard-driving scale or the Dutch adaptation of the JAS tended to have higher incidences of angina pectoris. However, overall the validity of this test as a predictor of CHD was not substantiated in this population.