The number of patients using open-source automated insulin delivery systems (OS-AID) is increasing. Although there is a lack of evidence, some people believe OS-AID provides better results than commercially available AID systems. We, therefore, compared an open-source AndroidAPS (AAPS) and commercially available Control-IQ (CIQ) in a prospective open-label single-arm clinical trial. Adults with T1D who had been using AAPS by their own decision were switched to the CIQ for 3 months. Results of this treatment were compared with those after 3-month phase on AAPS. The primary outcome was %TIR (70-180 mg/dL). Twenty-five patients participated in this study. CIQ was non-inferior to AAPS in achieving TIR (Figure). Similarly, there were no differences in %TAR (> 180 and > 250 mg/dL), in mean sensor glucose (130.3 ± 13.9 vs. 128.3 ± 16.9 mg/dL; p=0.21) and in A1C (6.3 ± 2.1% vs. 6.4 ± 3.1%; p=0.59). Importantly, %TBR (< 70 and < 54 mg/dL) were significantly lower when using CIQ than with AAPS. Even though participants were mostly satisfied with CIQ (63.6% mostly agree, 9.1% strongly agree) they do not plan to switch to CIQ. CIQ and AAPS were non-inferior in TIR. Hypoglycemia was significantly lower with CIQ. The CODIAC study is the first prospective study comparing OS-AID and commercially available AID system. These findings provide further guidance for clinicians and patients when discussing treatment options.


Q.Do: None. A.Hásková: None. L.Radovnická: None. J.Konecna: None. E.Horova: None. G.Grunberger: Advisory Panel; CeQur SA, Nevro Corp., LifeScan Diabetes Institute, Speaker's Bureau; Eli Lilly and Company, Novo Nordisk. C.Parkin: Consultant; Abbott Diabetes, Dexcom, Inc., CeQur SA, Tandem Diabetes Care, Inc., Roche Diabetes Care, Provention Bio, Inc., Lifecare, Inc., Insulet Corporation, Becton, Dickinson and Company. M.Prazny: Speaker's Bureau; Abbott, Boehringer Ingelheim Inc., AstraZeneca, Bayer Inc., Eli Lilly and Company, Merck Sharp & Dohme Corp., Novo Nordisk, Medtronic, Sanofi. J.Soupal: Speaker's Bureau; Dexcom, Inc.


Czech Ministry of Health (00064165); General University Hospital in Prague

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