Compared with class 1, participants in the other classes had fewer current smokers and drinkers, higher BMI, SBP and DBP, a higher prevalence of hypertension, diabetes, dyslipidemia and heart disease, and had higher FBG, TC, TG, LDL, HbA1 levels and lower HDL levels (Table 1). The gene discussed is HBA1; the disease is metabolic syndrome.