Comparación de los índices triglicéridosglucosa y McAuley en el síndrome metabólico en personas con riesgo para diabetes tipo 2 / Comparison of the triglyceride-glucose and McAuley indices in metabolic syndrome in people at risk for type 2 diabetes

Resumen La prevalencia de la glucosa elevada en ayunas y la diabetes tipo 2 (DT2) está aumentando en la Argentina. Interesa encontrar índices de insulinorresistencia accesibles al laboratorio clínico con bajo costo. En 74 varones y 142 mujeres con riesgo para DT2 se analizaron los índices de McAuley y triglicéridos-glucosa (T-G) para: a) determinar los valores del índice de McAuley y su correlación con el índice T-G; b) comparar ambos índices para la detección del síndrome metabólico (SM) y su concordancia; c) determinar la asociación con los componentes de SM. Para McAuley la mediana fue 6,68 y el rango intercuartílico (5,47-8,25) y para T-G fue 8,71 (8,35-9,05) respectivamente. La correlación entre ambos fue r=-0,802, p<0,001. Respecto del SM, las áreas bajo la curva ROC fueron: índice T-G=0,816±0,029 (IC95% 0,758-0,873), p<0,001 y para el 1/índice de McAuley=0,816±0,030 (IC95% 0,758-0,874) p<0,001. La concordancia Kappa entre ambos fue 0,630, p<0,001, Chi cuadrado 85,74 (p<0,001). Para T-G y McAuley la sensibilidad fue 80,7% y 80,7%, la especificidad 70,7% y 69,4%, PP+ 62,5% y 62%, PP- 83,9 y 85,3%, la razón de probabilidad positiva (RP+) fue 2,65 y 2,64 y la negativa (RP-) fue 0,30 y 0,27 respectivamente. Ambos se asociaron con triglicéridos ≥150 mg/dL y glucosa ≥100 mg/dL y ninguno con C-HDL bajo y presión arterial ≥130/85 mmHg o en tratamiento. McAuley mostró asociación con cintura ≥102/88 cm (p>0,001). Se concluye que T-G mostró una aceptable concordancia con McAuley y ambos una similar asociación con SM. T-G podría ser útil para estudios en poblaciones pero para su aplicación en la clínica se necesitan más estudios.

Abstract The prevalence of high fasting glucose and type 2 diabetes (T2D) is increasing in our country. It is interesting to find insulin resistance indices accessible to the clinical laboratory at low cost. In 74 men and 142 women at risk for T2D, the McAuley and triglyceride-glucose (T-G) indices were analised to: a) determine the McAuley index values and they correlation with the T-G index; b) compare both indices for the detection of metabolic syndrome (MS) and their concordance; c) determine the association with MS components. For McAuley the median was 6.68 and the interquartile range (5.47-8.25) and for T-G it was 8.71 (8.35-9.05) respectively. The correlation between both was r=-0.802, p<0.001. Regarding MS, the areas under the ROC curve were: TG index=0.816±0.029 (95%CI 0.758-0.873), p<0.001 and for the 1/McAuley index=0.816±0.030 (95%CI 0.758-0.874) p<0.001. The Kappa agreement between the two indices was 0.630, p<0.001, Chi square 85.74 (p<0.001). For TG and McAuley the sensitivities were 80.7% and 80.7%, the specificities 70.7% and 69.4%, PP+ 62.5% and 62%, PP- 83.9 and 85.3%, the ratios of positive probability (PR+) were 2.65 and 2.64 and negative probability (PR-) were 0.30 and 0.27 respectively. Both were associated with triglycerides≥150 mg/dL and glucose≥100 mg/dL and neither with low HDL-C and blood pressure≥130/85 mmHg or treated. McAuley showed an association with waist≥102/88 cm (p>0.001). It is concluded that T-G showed acceptable agreement with McAuley and both similar association with SM. T-G could be useful for population studies but further studies are needed for its clinical application.

Resumo A prevalência de glicose elevada em jejum e a diabetes tipo 2 (DM2) está aumentando na Argentina. Interessanos achar índices de resistência à insulina acessíveis ao laboratório clínico a baixo custo. Em 74 homens e 142 mulheres em risco de DT2, os índices de McAuley e triglicerídeos-glicose (T-G) foram analisados para: a) determinar os valores do índice de McAuley e sua correlação com o índice T-G; b) comparar os dois índices para detecção da síndrome metabólica (SM) e sua concordância; c) determinar a associação com componentes SM. Para McAuley a mediana foi de 6,68 e o intervalo interquartil (5,47-8,25) e para T-G foi de 8,71 (8,35-9,05), respectivamente. A correlação entre os dois foi r=-0,802, p<0,001. Em relação à SM, as áreas sob a curva ROC foram: índice T-G=0,816±0,029 (IC95% 0,758-0,873), p<0,001 e para o 1/índice de McAuley=0,816±0,030 (IC95% 0,758-0,874) p<0,001. A concordância Kappa entre os dois foi de 0,630, p<0,001, Qui quadrado 85,74 (p<0,001). Para T-G e McAuley a sensibilidade foi 80,7% e 80,7%, especificidade 70,7% e 69,4%, PP+ 62,5% e 62%, PP- 83,9 e 85,3%, a razão de probabilidade positiva (RP+) foi 2,65 e 2,64 e negativa (RP-) foi de 0,30 e 0,27, respectivamente. Os dois foram associados com triglicerídeos≥150 mg/dL e glicose≥100 mg/dL e nenhum com C-HDL baixo e pressão arterial≥130/85 mmHg ou tratamento. McAuley mostrou associação com cintura≥102/88 cm (p>0,001). Conclui-se que T-G apresentou concordância aceitável com McAuley e ambos os dois associação semelhante a SM. T-G poderia ser útil para estudos populacionais, mas mais estudos são necessários para sua aplicação clínica.

The Cut-off Values of Surrogate Measures for Insulin Sensitivity in a Healthy Population in Korea according to the Korean National Health and Nutrition Examination Survey (KNHANES) 2007–2010

BACKGROUND: This study aimed to identify the gender-specific characteristics of the surrogate measures of insulin resistance and to establish valid cut-off values for metabolic abnormalities in a representative sample in Korea. METHODS: Data were collected from the datasets of the Korean National Health and Nutrition Examination Survey between 2007 and 2010. The total number of eligible participants was 10,997. We used three measures of insulin resistance: the homeostasis model assessment-insulin resistance (HOMA-IR), McAuley index, and triglyceride and glucose (TyG) index. The estimated cut-off values were determined using the highest score of the Youden index. RESULTS: The area under the curve (AUC) of the HOMA-IR, McAuley index, and TyG index were 0.737 (95% confidence interval [CI], 0.725–0.750), 0.861 (95% CI, 0.853–0.870), and 0.877 (95% CI, 0.868–0.885), respectively. The cut-off values of the HOMA-IR were 2.20 in men, 2.55 in premenopausal women, and 2.03 in postmenopausal women, and those of the McAuley index were 6.4 in men and 6.6 in premenopausal and postmenopausal women. For the TyG index, the cut-off values were 4.76 in men and 4.71 in premenopausal and postmenopausal women. CONCLUSION: In conclusion, the present study provides the valid cut-off values of the indirect surrogate measures of insulin sensitivity. These values may be used as reference for insulin sensitivity in a clinical setting and may provide a simple and supplementary method for identifying populations at risk of insulin resistance.

Comparison of Surrogate Markers as Measures of Uncomplicated Insulin Resistance in Korean Adults / 가정의학회지

BACKGROUND: Metabolic syndrome (MS) is known to increase the risk of various cardiometabolic diseases and in-sulin resistance (IR) has known to have central role in the development of MS. Many surrogate indices of IR have been proposed and the detection of MS might be a suitable model for assessing the accuracy of surrogate indices. The aims of our study are to invest the most appropriate index by assessment of the diagnostic capacity of IR among each surrogate index and identifying cut-off values for discriminating uncomplicated MS in Korean adults. METHODS: A cross-sectional study was performed, assessing 294 Korean adults, 85 of whom were diagnosed with uncomplicated MS. The sensitivities and specificities of five surrogate IR indices were compared to discriminate MS from healthy subjects; these included fasting serum insulin, homeostasis model assessment-insulin resistance index, quantitative insulin sensitivity check index, McAuley index, and Disse index. Correlations between each index value were assessed using Pearson's and Spearman's correlation methods. RESULTS: The McAuley index showed the highest area under the curve (0.85), specificity (86.12%), accuracy (82.31%), positive predictive value (68.13%), and negative predictive value (88.67%) to distinguish MS, with a cut-off point of 5.3 defined. Correlation coefficients of the five indices showed that the McAuley index had the strongest correlation with IR. CONCLUSION: The McAuley index showed the best accuracy in the detection of MS as a surrogate marker of IR. To establish more effective and accurate standards of measuring IR, comprehensive and multi-scaled studies are required.

Blood pressure is associated with body fat and insulin resistance in non-hypertensive population / 中华内分泌代谢杂志

Relationship between blood pressure and insulin resistance was analyzed in 839 non hypertensive subjects (fasting plasma glucose