Aim To investigate the association between high density lipoprotein(HDL) subclasses and IL-6 concentration in patients with metabolic syndrome(MS). Methods The MS subjects(n = 135) and healthy controls(n= 77) were selected. The levels of IL-6 were determined by enzyme-linked immunosorbent assay(ELISA) kits. According to the levels of plasma IL-6,the MS subjects were divided into three groups: low IL-6 group(IL-6≤66.76 ng/L),middle IL-6 group(66.76 ng/L < IL-6 < 113. 84 ng/L),and high IL-6 group(IL-6 ≥ 113. ...