Prevalence and Trends of a Metabolic Syndrome Phenotype Among U.S. Adolescents, 1999–2000

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Abstract
OBJECTIVE—To determine the prevalence of a metabolic syndrome phenotype among U.S. adolescents using the most recent national data and to examine trends in metabolic syndrome prevalence. RESEARCH DESIGN AND METHODS—Analysis of data on 991 adolescents (aged 12–19 years) who had fasted for at least 6 h, from the National Health and Nutrition Examination Survey (NHANES 1999–2000). The metabolic syndrome was determined using the National Cholesterol Education Program (Adult Treatment Panel III) definition modified for age. RESULTS—The overall prevalence of a metabolic syndrome phenotype among U.S. adolescents increased from 4.2% in NHANES III (1988–1992) to 6.4% in NHANES 1999–2000 (P < 0.001). The syndrome was more prevalent (P < 0.01) in male than female adolescents (9.1 vs. 3.7%) and was found in 32.1% of overweight adolescents (BMI ≥95th percentile for age and sex), compared with 7.1% of adolescents at risk for overweight (BMI between 85th and 95th percentiles) (P < 0.001). Based on population-weighted estimates, >2 million U.S. adolescents currently have a metabolic syndrome phenotype. CONCLUSIONS—The prevalence of a metabolic syndrome phenotype has increased significantly over the past decade among U.S. adolescents and is particularly prevalent (>30%) in overweight adolescents. These findings have important implications for public health because of the well-known health risks associated with the metabolic syndrome in adults.

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