We evaluated the association between age of onset of type 2 diabetes and the risk for major diabetes complications. We included 1.1 million people with type 2 diabetes from the Australian diabetes registry, followed from 2010-2019. We evaluated the incidence of hospitalization for, or death from, myocardial infarction (MI) , stroke, and heart failure (HF) , and hospitalization for lower extremity amputation (LEA) ; the incidence of end-stage kidney disease (ESKD; including kidney replacement therapy or death from ESKD) ; and all-cause mortality (ACM) . Poisson regression was used to model rates by age of diabetes onset, current age, and diabetes duration. During 6.9 million person-years of follow-up, 72338, 46533, 101023, 20024, 13331, and 203542 MI, stroke, HF, LEA, ESKD, and ACM events occurred, respectively. The risk for all outcomes increased exponentially with diabetes duration (Figure) . The effects of age and duration differed for each: age was the stronger risk factor for MI, stroke, HF, and ACM, while duration was the predominant determinant of ESKD and LEA risk. At a given age, a 10-year younger age of onset was associated with a 1.1-1.5-fold increased risk of stroke and ACM, a 1.5-2-fold increased risk of MI and HF, and a 2-4-fold increased risk of LEA and ESKD. Thus, the increase in prevalence of young-onset type 2 diabetes may shift the burden of diabetes complications in coming decades.
J.I.Morton: None. P.Lazzarini: None. K.Polkinghorne: None. D.J.Magliano: None. J.E.Shaw: Advisory Panel; Abbott Diagnostics, AstraZeneca, Eli Lilly and Company, Pfizer Inc., Roche Diagnostics, Research Support; AstraZeneca, Boehringer Ingelheim International GmbH, Speaker's Bureau; AstraZeneca, Eli Lilly and Company, Novo Nordisk, Sanofi.
JIM is supported by an Australian Government Research Training Program (RTP) Scholarship and Monash Graduate Excellence Scholarship. PAL is supported by a National Health and Medical Research Council Early Career Fellowship. DJM is supported by a National Health and Medical Research Council Senior Research Fellowship. JES is supported by a National Health and Medical Research Council Investigator Grant. This work is partially supported by the Victorian Government’s Operational Infrastructure Support Program.