Examinando por Autor "Pantoja Torres, Betzi"
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- PublicaciónSólo datosAssociation between vitamin D deficiency and insulin resistance markers in euthyroid non-diabetic individuals(Insulin Resistance and Metabolic Syndrome Research Group, 2019) Urrunaga Pastor, Diego; Guarnizo Poma, Mirella; Macollunco Flores, Pilar; Lazaro Alcantara, Herbert; Paico Palacios, Socorro; Pantoja Torres, Betzi; Benites Zapata, Vicente A.Aim: To evaluate the association between vitamin D deficiency and insulin resistance (IR) or hyperinsulinemia after oral glucose tolerance test (OGTT) in euthyroid non-diabetic individuals. Materials and methods: We carried out an analytical cross-sectional study in euthyroid non-diabetic adults of both sexes, who attended the outpatient service of a private clinic in Lima-Peru during the 2012e2016 period. Participants were categorized in two groups according to their serum vitamin D levels: normal vitamin D levels (serum vitamin D values 20 ng/dL) and vitamin D deficiency (serum vitamin D values < 20 ng/dL). IR was defined as a Homeostasis Model Assessment (HOMA-IR) value 3.8 and hyperinsulinemia after OGTT was defined as a serum insulin value 80mU/mL after 120min of 75-g glucose intake. We elaborated crude and adjusted Poisson regression models to assess the association between serum vitamin D levels and IR or hyperinsulinemia after OGTT. The reported association measure was the prevalence ratio (PR) with their respective 95% confidence intervals (95%CI). Results: We analyzed 204 participants, the average age was 38.5 ± 10.6 (SD) years, 40 (19.6%) were males and the vitamin D median was 25.0 (IQR: 19.0e33.3) ng/dL. The prevalence of vitamin D deficiency, IR and hyperinsulinemia after OGTT was 29.4% (n ¼ 60), 29.9% (n ¼ 61) and 25.0% (n ¼ 51). In the adjusted Poisson regression models, the prevalence of hyperinsulinemia after OGTT was higher among the vitamin D deficient group (aPR¼1.75; 95%CI: 1.06e2.90); however, we did not find statistically significant association between vitamin D deficiency and IR (aPR¼0.99; 95%CI: 0.61e1.63). Conclusions: We found an association between vitamin D deficiency and hyperinsulinemia after OGTT in euthyroid people with no T2DM.Our findings are consistent with previous reports; providing evidence that serum vitamin D deficiency could be an IR marker.
- PublicaciónSólo datosTriglycerides and glucose index as an insulin resistance marker in a sample of healthy adults(Elsevier B.V., 2019-02) Toro Huamanchumo, Carlos J.; Urrunaga Pastor, Diego; Guarnizo Poma, Mirella; Lázaro Alcántara, Herbert; Paico Palacios, Socorro; Pantoja Torres, Betzi; Ranilla-Seguin, Vitalia Del Carmen; Benites Zapata, Vicente A.Aim: To assess the association between elevated triglycerides/glucose index (TGI) and insulin resistance (IR) or hyperinsulinemia after oral glucose tolerance test (OGTT) in a sample of healthy adults. Methods: We conducted an analytical cross-sectional study in euthyroid non-diabetic adults, who attended the outpatient service of a private clinic in Lima-Peru during the 2012–2016 period. Participants were categorized in two groups according to the presence or absence of elevated TGI, IR or hyperinsulinemia after OGTT. A TGI value ≥ 8.65 was considered as elevated. We defined IR as a Homeostasis Model Assessment (HOMA-IR) value ≥ 2.28 and hyperinsulinemia after OGTT as a serum insulin value ≥ 80μU/mL after 120 min of 75-g glucose intake. We elaborated crude and adjusted Poisson regression models to assess the association between elevated TGI and IR or hyperinsulinemia after OGTT. The reported association measure was the prevalence ratio (PR) with their respective 95% confidence intervals (95%CI). Results: We analyzed 118 individuals, the average age was 37.5 ± 11.3 years, 21 (17.8%) were males and the median BMI was 22.7 ± 1.6 kg/m2. The prevalence of elevated TGI was 25.4% (n=30) while the prevalence of IR and hyperinsulinemia after OGTT was 24.6% (n=29) and 17.0% (n=20) respectively. In the adjusted model, elevated TGI was associated with both IR (aPR=6.36; 95%CI: 3.41–11.86) and hyperinsulinemia after OGTT (aPR=4.19; 95%CI: 1.81–9.70). Conclusions: We found that elevated TGI was associated with both IR markers in a sample of euthyroid adults without T2DM and with a normal BMI. The simplicity of the TGI calculation makes it the first-choice alternative when the hyperinsulinemic-euglycemic clamp or HOMA-IR are not available. © 2018 Diabetes India