Under this contract, NHLBI received summary tabulations of: population demographics and vital statistics including the numbers of total deaths and of cardiovascular, coronary heart disease and stroke deaths among residents of each Reporting Unit; fatal and non-fatal coronary and stroke events; ECG abnormalities, chest pain symptoms, and cardiac enzyme measurements; population survey prevalence rates and distributions of risk factors including but not limited to blood pressure, total cholesterol, other lipids and lipoproteins, height, weight, and cigarette consumption; hospitalizations and medical care for cardiovascular conditions; case fatality rates within 28 days of onset of a heart attack, stroke, or other cardiovascular event. The NHLBI also received reports on the quality of the data and performance at each site based on the circulation and evaluation of test case histories.