CONTEXT AND OBJECTIVE: The frequency of obesity at an early age may contribute to atherosclerosis and cardiovascular disease (CVD) in adults. This study measured the frequency of obesity and cardiovascular risk factors in children and adolescents aged 6 to 17 years. DESIGN AND SETTING: Cross-sectional study in a school located in a region of low income and socioeconomic status in Santa Rita do Sapucai, Minas Gerais, Brazil. METHODS: A total of 175 students were classified using body mass index (BMI) and their waist circumference, blood pressure, number of hours of sedentary behavior and school meals were evaluated. Serum concentrations of fasting blood glucose, total cholesterol (TC), triglycerides (TG), low-density lipoprotein (LDL-C) and high-density lipoprotein (HDL-C) were analyzed. RESULTS: 37.2% of the students had BMI above the 85 th percentile and had significantly lower age, higher prevalence of hypertension, higher serum TC, LDL-C and TG, and greater waist circumference than those with BMI below the 85 th percentile. Hypertension was observed in 2.9% of the students; 5.1% presented impaired glucose tolerance, 40% had two risk factors for atherosclerosis and 26.9% had three risk factors. A sedentary lifestyle was significantly less prevalent among subjects with BMI above the 85 th percentile and was significantly correlated with serum TC and LDL-C. The school meals were hypoglycemic, hyperproteic and hyperlipidemic. CONCLUSION: One third of the children and adolescents had weights greater than or equal to the ageadjusted weight, and this was associated with greater waist circumference, hypertension and prevalence of dyslipidemia. RESUMOCONTEXTO E OBJETIVO: A frequência de obesidade em idade precoce pode contribuir para a aterosclerose e doença cardiovascular (DCV) em adultos. Este estudo mediu a frequência de obesidade e fatores de risco cardiovascular em crianças e adolescentes com idades entre 6 e 17 anos. TIPO DE ESTUDO E LOCAL:Estudo transversal em escola localizada numa região de baixa renda e baixo nível socioeconômico em Santa Rita do Sapucaí, Minas Gerais, Brasil. MÉTODOS: Um total de 175 alunos foi classificado pelo índice de massa corporal (IMC) e foram aferidas circunferência da cintura, pressão arterial, horas de sedentarismo e alimentação escolar. Realizaram-se dosagens séricas de glicemia de jejum, colesterol total (CT), triglicerídeos (TG), lipoproteína de baixa densidade (LDL-C) e lipoproteína de alta densidade (HDL-C). RESULTADOS: 37,2% dos alunos tinham IMC acima do percentil 85 e apresentaram idade significativamente menor, prevalência mais alta de hipertensão, CT sérico, LDL-C e TG elevados e maior circunferência abdominal em comparação com aqueles com IMC abaixo do percentil 85. Observou-se hipertensão em 2,9% dos estudantes, 5,1% apresentavam tolerância à glicose diminuída, 40% tinham dois fatores de risco para aterosclerose, e 26,9% tinham três fatores de risco. O sedentarismo foi significativamente menor em indivíduos com IMC acima do percentil 85 e foi significativamente...
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