Prevalence and risk factors of metabolic syndrome in obese children and adolescents: the role of the severity of obesity |
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Authors: | Yasar Sen Nurgun Kandemir Ayfer Alikasifoglu Nazli Gonc Alev Ozon |
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Institution: | (1) Department of Pediatric Endocrinology, Faculty of Medicine, Ihsan Doğramacı Children’s Hospital, Hacettepe University, Altındag, 06100 Ankara, Turkey;(2) Present address: Section of Pediatric Endocrinology, Faculty of Medicine, Firat University, 23119 Elazig, Turkey |
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Abstract: | The present study was performed to determine the prevalence of metabolic syndrome (MS) and its risk factors in obese children
and adolescents. The study included 352 obese children and adolescents (body mass index BMI] ≥ 95th percentile) aged between
2 and 19 years. The diagnosis of MS was made according to the criteria adapted from the World Health Organization (WHO) and
the National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) guidelines. BMI z-scores were calculated to assess the degree of obesity. The prevalence of MS and risk factors were determined. Determinants
of MS were examined using regression analysis. The prevalence of MS was 41.8%. The age at onset of obesity, sedentary life-span,
fasting blood levels of glucose, insulin, triglyceride, very-low-density lipoprotein (VLDL) cholesterol, and alanine aminotransferase
(ALT) were higher, while levels of high-density lipoprotein (HDL) cholesterol and the number of actively spent hours were
lower in cases with MS (p < 0.05). The most important determinant of MS was BMI z-score (r = 0.31, p < 0.0001). A one-point increase in BMI z-score yielded a 2-fold increase in the prevalence of MS. The prevalence of MS increased from 27.6% to 60.7% when the BMI
z-score increased from 2.3 to 3.3. The risk of developing MS was 2.6-fold higher in cases with BMI z-score > 3 when compared to those with z-scores between 2 and 3. The results from this study indicate that, although the correlation between MS and the BMI z-score was weak, the BMI z-score may be an effective parameter in identifying obese children and adolescents at risk for MS. Screening the cases with
BMI z-scores ≥ 2 for MS is important for establishing an early diagnosis. |
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Keywords: | Childhood obesity BMI z-score Metabolic syndrome Type 2 diabetes mellitus Cardiovascular risk factors |
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