LAUSR

Closed Loop Control (CLC) has the ability to reduce both hypoglycemia and hyperglycemia. We conducted a post-hoc analysis of data from the iDCL DCLP3 randomized trial comparing CLC with Control-IQ versus sensor augmented pump therapy (SAP) for 6 months in participants who had baseline CGM below 70mg/dL ≥4.0% of the time (N= 41 CLC, 14 SAP, mean±SD age of 33±16yrs, 49% female). CLC use led to a greater reduction in time below 70mg/dL (least square mean change from baseline of -4.6% in CLC vs. -3.1% in SAP, mean-adjusted treatment difference -1.5% or 22 min/d, 95% CI -2.2% to -0.9%, P Disclosure C.J. Levy: Consultant; Self; Dexcom, Inc. Employee; Spouse/Partner; Allergan plc. Research Support; Self; Abbott, Dexcom, Inc., Insulet Corporation. G. O’Malley: Research Support; Self; Abbott, Dexcom, Inc. S.A. Brown: Research Support; Self; Dexcom, Inc., Insulet Corporation, Roche Diabetes Care, Tandem Diabetes Care, Tolerion, Inc. G.P. Forlenza: Advisory Panel; Self; Medtronic. Consultant; Self; Dexcom, Inc., Insulet Corporation, Tandem Diabetes Care. Research Support; Self; Abbott, Dexcom, Inc., Insulet Corporation, Medtronic, Tandem Diabetes Care. Y.C. Kudva: Research Support; Self; Dexcom, Inc., Roche Diabetes Care. Other Relationship; Self; Abbott. R. Beck: None. C. Kollman: Other Relationship; Self; Dexcom, Inc., Tandem Diabetes Care. J. Lum: None. D. Raghinaru: None. B. Kovatchev: Advisory Panel; Self; Dexcom, Inc. Research Support; Self; Dexcom, Inc., Tandem Diabetes Care. Speaker’s Bureau; Self; Dexcom, Inc., Sanofi, Tandem Diabetes Care. Other Relationship; Self; Dexcom, Inc., Johnson & Johnson, Sanofi. Funding National Institute of Diabetes and Digestive and Kidney Diseases (UC4108483); University of Virginia Strategic Investment Fund (Project 88); Tandem Diabetes Care