Characteristics of participants according to CVD risk factors.*

CVD = cardiovascular disease; RMB = Ren Min Bi; NSAIDS = non-steroidal anti-inflammatory drugs; DASH = dietary approaches to stop hypertension.The categorical variables are presented as prevalence rate (95% confidence intervals), and all prevalence rates are adjusted for synthesized weights.*Household income is presented as the median (inter-quartile range) because of substantial skewness.†First-degree relatives suffered from hypertension, diabetes, stroke and/or coronary heart disease, and the onset was before the age of 55 for men or before the age of 65 for women.