Table 2. Prevalence of Metabolic Syndrome among Korean Children and Adolescents during 1998 to 2012.

Survey year	Sample	Age distribution, yr	Definition of MetS	Prevalence of MetS, %
				Boy	Girl
1998	Nationwide	10–18	Having three or more of the following criteria: waist circumference ≥ 90th percentile for age and sex; systolic or diastolic BP ≥ 90th percentile for age, sex, and height; fasting glucose level ≥100 mg/dL; triglyceride level ≥110 mg/dL; HDL-C level ≤40 mg/dL	6.7	8.4
2001				12.9	6.4
2005				13.4	8.1
2008				6.9	6.5
2008–2010	Nationwide	10–18	Having three or more of the following criteria: waist circumference ≥ 90th percentile for age and sex; systolic or diastolic BP ≥ 90th percentile for age, sex, and height; fasting glucose level ≥100 mg/dL; triglyceride level ≥110 mg/dL; HDL-C level ≤40 mg/dL	6.0	4.2
2010–2012	Nationwide	12–19	Three or more of the following criteria: waist circumference ≥ 90th percentile for age and sex; systolic or diastolic BP ≥ 90th percentile for age, sex, and height and/or using antihypertensive medication; fasting glucose level ≥100 mg/dL and/or using hypoglycemic agents; triglyceride level ≥110 mg/dL and/or using the dyslipidemia medication; HDL-C level ≤40 mg/dL	5.4	3.1

MetS, metabolic syndrome; BP, blood pressure; HDL-C, high density lipoprotein cholesterol.