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  • Title: The dose-response effect of insulin sensitivity on albuminuria in children according to diabetes type.
    Author: Mottl AK, Divers J, Dabelea D, Maahs DM, Dolan L, Pettitt D, Marcovina S, Imperatore G, Pihoker C, Mauer M, Mayer-Davis EJ, SEARCH for Diabetes in Youth Study.
    Journal: Pediatr Nephrol; 2016 Jun; 31(6):933-40. PubMed ID: 26754041.
    Abstract:
    BACKGROUND: Insulin resistance is associated with microalbuminuria among youth with diabetes mellitus. We sought to determine the dose-response effect of insulin sensitivity (IS) on the magnitude of albuminuria and whether there is a threshold below which urine albumin excretion increases. METHODS: These analyses included participants from the SEARCH for Diabetes in Youth Study with incident diabetes who completed a baseline study visit (n = 2988). We estimated IS using a validated equation incorporating waist circumference, HbA1C, and fasting serum triglycerides. Multivariate regression analyses were performed to assess the effect of IS on urine albumin creatinine ratio (UACR), stratified by diabetes type. The IS threshold was then determined using segmented regressions within each diabetes type and incorporated into the multivariate model. RESULTS: There was an association between IS and UACR in type 2 diabetes only (beta = -0.39; p < 0.001). There was strong statistical evidence for a threshold effect of IS score on UACR in the group of youth with type 2 (beta = 0.40; p < 0.001) but not type 1 diabetes (p = 0.3). CONCLUSIONS: In cross-sectional analyses, there is a negative association between IS and UACR in youth with type 2 but not type 1 diabetes, and this association likely includes a threshold effect of IS on UACR.
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