Covariates | Age 45 to <50; Age 50 to <55; Age 55 to <60; Age 60 to 64; Race: black; Race: white; Height <164 cm; Height 164 to <173 cm; Height >=173 cm; Systolic blood pressure <100 mmHg; Systolic blood pressure 100 to <120 mmHg; Systolic blood pressure 120 to <140 mmHg; Systolic blood pressure 140 to <160 mmHg; Systolic blood pressure >=160 mmHg; Hypertension medication use; Smoking status: never; Smoking status: former; Smoking status: current; Precordial murmur; Left atrial enlargement; Left ventricular hypertrophy, white race; Left ventricular hypertrophy, black race; Diabetes mellitus, age 45 to <50; Diabetes mellitus, age 50 to <55; Diabetes mellitus, age 55 to <60; Diabetes mellitus, age 60 to 64; Heart failure; Coronary heart disease, age 45 to <50; Coronary heart disease, age 50 to <55; Coronary heart disease, age 55 to <60; Coronary heart disease, age 60 to 64 |