Participants who had complete data on the MetS components ( waist circumference , blood pressure , triglycerides , glucose , high-density lipoprotein cholesterol ) at 15 ( n = 512 ) , 16 ( n = 485 ) , 17 ( n = 475 ) , 18 ( n = 459 ) , 19 ( n = 439 ) , and 20 ( n = 407 ) years of age were included in the study .