Other variables
The data on age, sex, race and household income were obtained during the
in-home interview. Race was categorized as white and others. Income was
dichotomized as < $20K/year and ≥ $20K/year. Smoking status
was obtained through the corresponding questionnaire and analyzed as a
2-level categorical variable (current and other). Body mass index (BMI)
was defined as the weight (kg) divided by height (m) squared. The
history of some diseases such as cancer and diabetes mellitus (DM) was
self-reported. Family history of CVD and the use of antihypertensive as
well as atrioventricular nodal drug including β-blocker or
dihydropyridine calcium blocker information were also obtained through
self-report. Blood pressure was the average of six measurements (three
in-home measurements and three mobile center measurements). Total serum
cholesterol and high-density lipoprotein cholesterol (HDL-c) levels were
measured enzymatically.