Concerns about hypoglycaemia and weight gain are barriers to treatment adherence, and consequently glucose control, in type 1 diabetes (T1D). In adults inadequately controlled by insulin alone, DEPICT-1 and DEPICT-2 phase 3 trials showed statistically significant decreases in HbA1c, glycaemic variability and body weight for adjunct dapagliflozin (DAPA), along with moderate reduction in insulin requirements. As adherence to T1D treatment can be a daily challenge, understanding the implications of discontinuation is important. This study evaluated changes in HbA1c, weight and insulin dose following discontinuation of DAPA in the DEPICT trials. Data were analyzed from patients discontinuing DAPA (5 mg or 10 mg, added to insulin) at any point in DEPICT-1 or DEPICT-2 (unplanned or end of study). Annualized rates of change in HbA1c (%) and weight (kg) following discontinuation of DAPA were estimated via linear regression and trajectories derived from mean rates of change. Insulin doses were summarized before and after discontinuation and correlated to analyzes of weight and HbA1c. The main reasons for unplanned discontinuation of DAPA were adverse events and patient withdrawal of consent. Following DAPA discontinuation, annualized changes in HbA1c and weight were +0.99% (95% CI: 0.39, 1.59) and +3.75Kg (1.65, 5.86), respectively (N=91). Mean insulin dose two weeks post-discontinuation was higher than two weeks prior to discontinuation (5mg: +4.0 IU, 10mg: +4.4 IU). These estimates directly contrast to observed reductions in HbA1c, weight and insulin dose associated with DAPA treatment. Discontinuation of DAPA led to significant increases in HbA1c and weight, in addition to higher insulin doses soon after discontinuation. Enabling ongoing DAPA treatment may benefit patients due to the detrimental impact of poor glycaemic control and weight gain on retinopathy, nephropathy and cardiovascular disease shown in long-term T1D studies, such as DCCT and EDIC.
J. Gordon: Research Support; Self; AstraZeneca, Bristol-Myers Squibb Company, GlaxoSmithKline plc., Novartis AG, Novo Nordisk A/S, Pfizer Inc., Takeda Canada, Takeda Pharmaceutical Company Limited. T. Danne: Advisory Panel; Self; Abbott, AstraZeneca, Boehringer Ingelheim Pharmaceuticals, Inc., Lilly Diabetes, Medtronic, Novo Nordisk A/S, Roche Diabetes Care, Sanofi-Aventis. Speaker's Bureau; Self; Dexcom, Inc. L.M. Beresford-Hulme: None. H. Bennett: Consultant; Self; AstraZeneca. Employee; Self; Health Economics and Outcomes Research Ltd. A. Tank: Employee; Self; AstraZeneca. C. Edmonds: Employee; Self; AstraZeneca. F.A. Thoren: Employee; Self; AstraZeneca. M.F. Scheerer: Employee; Self; AstraZeneca. P. McEwan: Consultant; Self; AstraZeneca. Employee; Self; Health Economics and Outcomes Research Ltd.