RESUMOObjetivo: Apesar da importância da resistência à insulina (RI) no desenvolvimento de doenças crô-nicas, seu diagnóstico envolve demandas invasivas. Assim, faz-se necessário o desenvolvimento de métodos alternativos para predizer RI na prática clínica, sendo os indicadores antropométricos uma alternativa. Portanto, o objetivo deste estudo é avaliar o comportamento desses indicadores com relação ao HOMA-IR (Homeostasis Model Assessment of Insulin Resistance). Materiais e métodos: Coletaram-se peso, altura e circunferência da cintura de 148 adolescentes. A partir destes, calcularam-se índice de massa corporal (IMC), índice de massa corporal invertido (IMCi), relação cintura-estatura (RCE) e índice de conicidade (IC). Coletaram-se ainda dados de composição corporal (percentual de gordura corporal -%GC), por meio de bioimpedância elétrica, e dados bioquímicos (glicemia e insulinemia de jejum) empregados no cálculo do HOMA-IR. O ponto de corte para o HOMA-IR adotado foi de 2,39 ± 1,93. A análise estatística envolveu a correlação de Spearman, a construção de modelos de regressão linear múltiplos e curvas ROC (Receiver Operating Characteristic), com IC de 95%. Utilizou--se o pacote estatístico SPSS v.18.0, considerando p < 0,05 como nível de significância. Resultados: Todos os indicadores antropométricos estavam estatisticamente correlacionados de forma positiva ao HOMA-IR. A curva ROC mostrou que CC, RCE e IC, nesta ordem, apresentaram-se mais eficazes em predizer RI. Conclusão: Entre os indicadores estudados, aqueles relacionados ao acúmulo de gordura central parecem os mais indicados para predizer RI. Arq Bras Endocrinol Metab. 2014;58(8):838-43 Descritores Antropometria; resistência à insulina; adolescente; composição corporal ABSTRACT Objective: Despite the importance of insulin resistance (IR) on chronic diseases development, its diagnosis remains invasive. Thus, it's necessary to develop alternative methods to predict IR on clinical practice, and the anthropometric indices are a good alternative to it. Given that, this study's purpose is to evaluate these indices behavior in relation to HOMA-IR (Homeostasis Model Assessment of Insulin Resistance). Materials and methods: We collected weight, height and waist circumference from 148 adolescents. Through these indices, we calculated the body mass index (BMI), inverted body mass index (iBMI), waist-to-height ratio (WHtR) and conicity index (C index). We also collected data from body composition (body fat percentage -%BF), through electric impedance, and biochemical data (fasting glucose and insulin levels) employed on the HOMA-IR calculation. The HOMA-IR cutoff adopted was of 2.39 ± 1.93. The statistical analysis involved the Spearman correlation analysis, multiple linear regression models and ROC (Receiver Operating Characteristic) curves construction, using 95% CI. We used the statistic pack SPSS v.18, considering p < 0.05 as the significance level. Results: All anthropometric indices were statistically and positively correlated to HOMA-IR. The ROC curve showe...

The purpose of this study was to evaluate the pattern of intake of coffee and caffeine-containing food among students in a post-secondary institution in northeastern Brazil. We interviewed 498 students. Among these students, 72.3% (n = 360) reported to consume coffee, with a higher prevalence among women (68.3%) and students aged between 18 and 25 years (82.8%). The student's residence itself was the top location for taking coffee (90.6%) and the most widely used method of preparation was brewing coffee using a cloth filter (82.5%). The average intake of coffee was 199.0 ± 230.6 ml/day, with a frequency of 1.6 ± 1.4 times a day and concentration between 4%-12%. Coffee was the main source of caffeine and the average daily intake of 147.3 ± 141.2 mg of caffeine was low. The data showed that the intake of coffee and caffeine does not represent a risk factor for the population studied. On the other hand, the scarcity of national studies on the subject points to the need of similar research about customer profile and pattern of consumption of coffee and caffeine, especially regarding the preparation technique of coffee, featuring benefits or risks for the development of chronic diseases.