Incidence and independent risk factors for heart failure in a population-based cohort of 19,892 individuals with newly diagnosed diabetes.

aims/hypothesisHeart failure (HF) is a common complication of diabetes, associated with a high mortality rate and a substantial healthcare burden. Residual HF risk persists despite achieving current treatment targets, suggesting a role for additional mechanisms beyond conventional risk factors. We sought to prospectively assess HF incidence and independent risk factors in individuals with new-onset diabetes.

methodsWe used a prospective inception cohort (ANDIS, n=19,892) that included all individuals with newly diagnosed diabetes from southern Sweden between 2008 and 2021. Baseline clinical, biochemical and questionnaire data were linked to the Region Scania Care Database to obtain data on cardiovascular events and to the National Diabetes Registry to gather further data on cardiovascular risk factors that were not collected in the ANDIS study protocol. All-cause HF included all cases of HF regardless of underlying aetiology, whereas non-ischaemic HF was defined as HF occurring in individuals without prior acute myocardial infarction at baseline or during follow-up before the HF diagnosis. Cardiovascular disease incidence was estimated using the Kaplan-Meier method, and the associations with risk factors and incident HF were assessed using Cox proportional hazards regression.

resultsThe median age of the overall population was 62.5 years (IQR 52.6-70.3), while the median age among individuals who developed incident all-cause HF was 69.8 years (IQR 62.7-76.7). A total of 819 individuals (4.1%) with prevalent HF were excluded. During up to 14 years of follow-up (median 5.0), the cumulative incidence of HF was 4.8%, exceeding that of myocardial infarction (3.0%). No individuals with type 1 diabetes developed HF, but the incidence was similar across those with type 2 diabetes, latent autoimmune diabetes in adults, and secondary diabetes. A lower eGFR and higher HOMA2-IR, were associated with increased risk of all-cause and non-ischaemic HF, independently of the presence of conventional risk factors. Insulin resistance predicted all-cause HF independently of the established SCORE2-Diabetes risk score. The hazard ratio (HR) per 1 SD increase in HOMA2-IR was highest in the low-risk group (HR 1.89; 95% CI 1.02, 3.48; p=4.3 × 10 CONCLUSIONS/

interpretationThe HF incidence was high, with approximately 1 in 20 individuals developing HF within 5 years after diagnosis of diabetes other than type 1, highlighting a notably high risk of developing HF soon after diabetes diagnosis. Beyond conventional risk factors, higher HOMA2-IR and lower renal function, but not hyperglycaemia or autoantibodies, were independent risk factors for HF. Measuring HOMA2-IR also provided prognostic information in addition to that provided by the SCORE2-Diabetes risk score, supporting its value in HF risk stratification.