title: Prevalence of the hypertriglyceridemic waist phenotype in Iranian adolescents.
abstract: BACKGROUND
  No evidence exists regarding the prevalence of the hypertriglyceridemic waist phenotype in adolescents. We aimed to evaluate the prevalence of this phenotype in a representative sample of Tehranian adolescents.
  
  
  METHODS
  Anthropometry and serum triglyceride concentration were assessed in a population-based cross-sectional study of 3036 Tehranian adolescents (1413 male and 1623 female) aged 10 to 19 years in 1998. Hypertriglyceridemic waist phenotype was defined as concurrently having serum triglyceride concentration>or=110 mg/dL and waist circumference equal to or greater than the 90th percentile for age and gender. Overweight (>or=95th percentile) and at risk for overweight (>or=85th to <95th percentile) was defined based on the standardized percentile curves of body mass index suggested for Iranian adolescents.
  
  
  RESULTS
  The prevalence of the hypertriglyceridemic waist phenotype was 6.4% (95% confidence interval [CI]=5.5-7.2) among Tehranian adolescents (males 7.3%, CI=5.9-8.7; females 5.6%, CI=4.4-6.7). When examined by body mass index category, 38.7% of overweight adolescents had a hypertriglyceridemic waist compared to 7.7% of adolescents at risk for overweight and 0.7% of adolescents at normal weight (p=0.001).
  
  
  CONCLUSIONS
  This study provides evidence showing that the hypertriglyceridemic waist phenotype is prevalent among 6.5% of Tehranian adolescents, and particularly among overweight adolescents.
authors.affiliation: Endocrine Research Center, Shaheed Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Esmaillzadeh
authors.forename: Parvin
authors.initials: P
authors.lastname: Mirmiran
authors.forename: Leila
authors.initials: L
authors.lastname: Azadbakht
authors.forename: Fereidoun
authors.initials: F
authors.lastname: Azizi
mesh_terms: D000293:Adolescent; D017677:Age Distribution; D000886:Anthropometry; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D003920:Diabetes Mellitus / Q000453:epidemiology / Q000235:genetics; D005192:Family Health; D005260:Female; D006801:Humans; D006953:Hyperlipoproteinemia Type IV / Q000453:epidemiology* / Q000235:genetics*; D007492:Iran / Q000453:epidemiology; D016014:Linear Models; D008297:Male; D024821:Metabolic Syndrome / Q000453:epidemiology / Q000235:genetics; D050177:Overweight / Q000235:genetics*; D010641:Phenotype; D015995:Prevalence; D017678:Sex Distribution; D014481:United States / Q000453:epidemiology; D049629:Waist-Hip Ratio