Comparison of metabolic syndrome prevalence using six different definitions in overweight pre-pubertal children enrolled in a weight management study

• Published in: International Journal of Obesity Vol. 30; no. 5; pp. 853 - 860
• Main Authors: GOLLEY, R. K, MAGAREY, A. M, STEINBECK, K. S, BAUR, L. A, DANIELS, L. A
• Format: Journal Article
• Language: English
• Published: Basingstoke Nature Publishing 01.05.2006; Nature Publishing Group
• Subjects: Adolescents; Age Factors; Anthropometry; Australia - epidemiology; Biological and medical sciences; Blood Glucose - analysis; Blood Pressure; Body Mass Index; Child; Children; Cholesterol; Cholesterol - blood; Classification; Cross-Sectional Studies; Female; Humans; Insulin; Insulin - blood; Male; Medical sciences; Metabolic diseases; Metabolic disorders; Metabolic Syndrome - classification; Metabolic Syndrome - epidemiology; Miscellaneous; Obesity; Overweight; Prevalence; Public health. Hygiene; Public health. Hygiene-occupational medicine; Sensitivity and Specificity; Endocrinopathy; Pancreatic hormone; Prevalence; Body weight; Cardiovascular disease; Lipids; Epidemiology; Overweight; Body mass index; X Syndrome; Arterial pressure; Blood pressure; Waist hip ratio; Child; Nutritional status; Human; Obesity; Puberty; childhood; waist circumference; Nutrition disorder; Weight loss; Definition; Metabolic diseases; Insulin; Adolescent; Hemodynamics; Comparative study
• ISSN: 0307-0565; 1476-5497
• DOI: 10.1038/sj.ijo.0803195

To assess the implications of variation in Metabolic Syndrome (MS) definition (biochemical and anthropometric indicators) on MS prevalence estimates in a population of overweight and mildly obese children. Cross-sectional study. Ninety-nine (64 girls) overweight or mildly obese, but otherwise healthy, pre-pubertal 6-9-year olds recruited for a randomized controlled trial of weight management. Height, weight and waist circumference were measured with BMI and waist z-scores calculated. Fasting cholesterol and fractions, glucose and insulin were measured, together with systolic and diastolic blood pressure (BP). Anthropometric and metabolic indicators were classified as normal or elevated using adult- or child-specific cut points with clustering of MS indicators also assessed using two adult and three child-specific definitions. A total of 0-4% of subjects were classified with MS when adult definitions were applied. This increased to between 39 and 60% using child-specific definitions, varying according to whether hyperinsulinaemia was central to the MS classification. Systolic BP, triglycerides, total cholesterol, high-density lipoprotein cholesterol and waist z-score increased across insulin quartiles (P<0.05). The use of body mass index and waist circumference in the MS definition classified the same subjects. The classification of MS in children depends strongly on the definition chosen, with MS prevalence estimates higher if insulin is part of the definition and child-specific cut points for metabolic indicators are used. Hyperinsulinaemia and MS are common consequences of childhood obesity but they are not commonly part of the assessment or management plan for weight management in children. There is a need for the establishment of normal insulin ranges and consistent definition of MS in childhood and adolescence.