Importance of Cardiorenal Complications for Prognosis in Persons with Type 1 Diabetes and Controls

Background: Historically, life expectancy in persons with type 1 diabetes (T1D) has been shorter than the general population, but earlier studies did not stratify patients according to cardiorenal complications. Methods: T1D persons were identified in the Swedish National Diabetes Registry (n=45,575) and compared with matched controls from the general population (n=220,141) . Mortality rates from 2002 to 20were estimated in persons with T1D overall and after stratification for prevalent cardiovascular and renal disease. Results: In persons with T1D, mean age was 32.4 years and 44.9% were women. Age- and sex- adjusted mortality rates decreased over time in both groups but remained significantly higher in those with T1D during 2017 to 2019. In T1D persons ≥45 years without previous renal or cardiovascular complications (approximately 50% of persons in this age group) similar standardized mortality rates were observed, over time compared with controls, with slightly lower mortality in T1D persons during the last period, 5.55 (95% CI 4.51-6.60) vs. 7. (95% CI 6.75-7.40) deaths per 1,000 person years (Figure) . Conclusion: Excess mortality persisted over time in persons with T1D, largely in patients with cardiorenal complications. Improved secondary prevention with a focus on differentiated treatment is needed to close the gap in mortality for persons with T1D. Disclosure S. Hallström: None. M.O. Wijkman: None. J. Ludvigsson: Advisory Panel; Dompé. Research Support; Diamyd Medical. M.A. Pfeffer: Consultant; AstraZeneca, Boehringer Ingelheim and Eli Lilly Alliance, Corvidia Therapeutics, GlaxoSmithKline plc., Lexicon Pharmaceuticals, Inc., Novartis Pharmaceuticals Corporation, Novo Nordisk, Peerbridge, Sanofi. Research Support; Novartis Pharmaceuticals Corporation. Other Relationship; DalCor Pharmaceuticals, National Heart, Lung, and Blood Institute. A. Rosengren: None. M. Lind: Consultant; AstraZeneca, Boehringer Ingelheim International GmbH, Eli Lilly and Company, Novo Nordisk. Research Support; Eli Lilly and Company, Novo Nordisk. Funding ALF [ALFGBG-717211] and [ALFGBG-966173], grants from the Novo Nordisk foundation, Swedish Heart and Lung Foundation [20180589], [20210679], Swedish Research Council [2018-02527] [VRREG 2019-00193], and the Gothenburg Society of Medicine.