Improved Time in Range Over 1 Year Is Associated With Reduced Albuminuria in Individuals With Sensor-Augmented Insulin Pump-Treated Type 1 Diabetes.

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To investigate the association between treatment-induced change in continuous glucose monitoring (CGM) time in range (TIR) and albuminuria in persons with type 1 diabetes (T1D) treated with sensor-augmented insulin pumps (SAP).Twenty-six out of 55 participants with albuminuria and multiple daily injection therapy (25% females; 51 [46-63] years of age; glycated hemoglobin A1c (HbA1c) 75 [68-88] mmol/mol [9.0% (8.4-10.4%)]; and urinary albumin-to-creatinine ratio (UACR) 89 [37-250] mg/g) were in a randomized controlled trial assigned to SAP therapy for 1 year. Anthropometrics, CGM data, and blood and urine samples were collected every 3 months.Mean change (95% CI) in percentage of TIR (%TIR) was 13.2% (6.2; 20.2), HbA1c was -14.4 (-17.4; -10.5) mmol/mol (-1.3% [-1.6; -1.0]), and UACR was -15% (-38; 17) (all P < 0.05). UACR decreased by 19% (10; 28) per 10% increase in %TIR (P = 0.04), 18% (1; 30) per 10 mmol/mol decrease in HbA1c (P = 0.07), and 31% per 10-mmHg decrease in mean arterial pressure (P < 0.001).In this longitudinal study, treatment-induced increase in %TIR was significantly associated with decrease in albuminuria in T1D.


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