Glycemic Outcomes of Use of CLC Versus PLGS in Type 1 Diabetes: A Randomized Controlled Trial

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Brown, Sue | Beck, Roy | Raghinaru, Dan | Buckingham, Bruce | Laffel, Lori | Wadwa, R Paul | Kudva, Yogish | Levy, Carol | Pinsker, Jordan | Dassau, Eyal | Doyle, Francis | Ambler-Osborn, Louise | Anderson, Stacey | Church, Mei Mei | Ekhlaspour, Laya | Forlenza, Gregory | Levister, Camilla | Simha, Vinaya | Breton, Marc | Kollman, Craig | Lum, John | Kovatchev, Boris | Wadwa, R. Paul | Emory, Emma | Voelmle, Mary | Conshafter, Katie | Morris, Kim | Oliveri, Mary | Gondor-Fredrick, Linda | Mitchell, Harry | Calvo, Kayla | Wakeman, Christian | Isganaitis, Elvira | Flint, Emily | Kim, Kenny | Roethke, Lindsay | Andre, Camille | Piper, Molly | Lam, David | O’malley, Grenye | Ogyaadu, Selassie | Lovett, Jessica | Dadlani, Vikash | Mccrady-Spitzer, Shelly | Reid, Corey | Kumari, Kanchan | Forlenza, Greg | Alonso, G. Todd | Slover, Robert | Jost, Emily | Messer, Laurel | Berget, Cari | Towers, Lindsey | Rossick-Solis, Alex | Jacobson, Tali | Town, Marissa | Tabatabai, Ideen | Keller, Jordan | Salas, Evalina | Passman, Samantha | Campos, Tiffany | Murphy, Carlos | Patibandla, Nandan | Borgman, Sarah | Arreza-Rubin, Guillermo | Eggerman, Thomas | Green, Neal | Doyle Iii, Francis | Renard, Eric | Cobelli, Claudio | Reznik, Yves | Janicek, Robert | Gabrielson, Deanna | Belle, Steven | Castle, Jessica | Green, Jennifer | Legault, Laurent | Willi, Steven | Wysham, Carol

Edité par CCSD ; American Diabetes Association -

International audience. OBJECTIVE Limited information is available about glycemic outcomes with a closed-loop control (CLC) system compared with a predictive low-glucose suspend (PLGS) system. RESEARCH DESIGN AND METHODS After 6 months of use of a CLC system in a randomized trial, 109 participants with type 1 diabetes (age range, 14–72 years; mean HbA1c, 7.1% [54 mmol/mol]) were randomly assigned to CLC (N = 54, Control-IQ) or PLGS (N = 55, Basal-IQ) groups for 3 months. The primary outcome was continuous glucose monitor (CGM)-measured time in range (TIR) for 70–180 mg/dL. Baseline CGM metrics were computed from the last 3 months of the preceding study. RESULTS All 109 participants completed the study. Mean ± SD TIR was 71.1 ± 11.2% at baseline and 67.6 ± 12.6% using intention-to-treat analysis (69.1 ± 12.2% using per-protocol analysis excluding periods of study-wide suspension of device use) over 13 weeks on CLC vs. 70.0 ± 13.6% and 60.4 ± 17.1% on PLGS (difference = 5.9%; 95% CI 3.6%, 8.3%; P < 0.001). Time >180 mg/dL was lower in the CLC group than PLGS group (difference = −6.0%; 95% CI −8.4%, −3.7%; P < 0.001) while time <54 mg/dL was similar (0.04%; 95% CI −0.05%, 0.13%; P = 0.41). HbA1c after 13 weeks was lower on CLC than PLGS (7.2% [55 mmol/mol] vs. 7.5% [56 mmol/mol], difference −0.34% [−3.7 mmol/mol]; 95% CI −0.57% [−6.2 mmol/mol], −0.11% [1.2 mmol/mol]; P = 0.0035). CONCLUSIONS Following 6 months of CLC, switching to PLGS reduced TIR and increased HbA1c toward their pre-CLC values, while hypoglycemia remained similarly reduced with both CLC and PLGS.

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