Prevalence of the hypertriglyceridemic waist phenotype in Iranian adolescents.
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.
Esmaillzadeh
Ahmad
A
Endocrine Research Center, Shaheed Beheshti University of Medical Sciences, Tehran, Iran.
Mirmiran
Parvin
P
Azadbakht
Leila
L
Azizi
Fereidoun
F
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