Correlação dos indicadores antropométricos em identificar a sensibilidade e resistência insulínicas
Palavras-chave:
Resistência à insulina, Estado pré-diabético, Hiperglicemia, Índice de massa corporal, Circunferência da cintura, AntropometriaResumo
CONTEXTO E OBJETIVOS: A detecção precoce da redução na sensibilidade à insulina (SI) e resistência insulínica (RI) é desejável. O objetivo foi avaliar a correlação dos indicadores antropométricos em identificar a SI e RI, determinando os pontos de corte dos mais eficazes. TIPO DE ESTUDO E LOCAL: Estudo transversal na cidade de São Paulo. MÉTODOS: Analisou-se 61 indivíduos com glicemia de jejum normal (GJN) e 43 mulheres com sobrepeso. Determinou-se: índice de massa corporal (IMC), circunferência abdominal (CA), relação cintura quadril, relação cintura estatura (RCE), índice de conicidade e os índices HOMA-IS e HOMA-IR. As correlações entre os indicadores antropométricos e SI e RI foram determinadas. Análise ROC foi empregada com determinação das áreas abaixo da curva (AUC) e pontos de corte. RESULTADOS: No grupo de indivíduos com GJN, demonstraram correlação com o HOMA-IS (homeostasis model assessment of insulin sensitivity), o IMC (r = -0,50; P = 0,002) e RCE (= -0,45; P = 0,007). A curva ROC demonstrou significância estatística para IMC (AUC = 0,769; P = 0,005), RCE (AUC = 0,764; P = 0,01) e CA (AUC = 0,702; P = 0,04); os melhores pontos de corte foram 33,3 kg/m2 , 0,67 e 100 cm, respectivamente. Entre mulheres com sobrepeso, as melhores correlações com o HOMA-IR foram demonstradas pela RCE (r = 0,37; P = 0,01), e o melhor ponto de corte foi 0,70 (AUC = 0,61; P = 0,25). CONCLUSÃO: Os indicadores mais promissores para indicar SI em indivíduos com GJN foram IMC, RCE e CA. Entre mulheres com sobrepeso, RCE demonstrou maior correlação com a RI.
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