Abstract 14262: Cancer - A Driver of Heart Failure in People With Diabetes

Abstract

Introduction: Despite the risk of heart failure (HF) in the survivorship phase of some cancers, the risk is not high enough to justify HF screening. However, people with diabetes mellitus (DM) have an increased risk of both HF and cancer. Examining this at-risk population may allow for better understanding of the effect cancer has on the development of HF. Hypothesis: Among people with DM, HF is more common in those with than without prior cancer. Methods: Data from the Australian National Diabetes Services Scheme (NDSS; 1,114,356 DM, types 1 and 2) from 2010 to 2019, was linked with public hospital data, the National Death Index and national Pharmaceutical Benefits Scheme (PBS) database. People with cancer were identified by the prescription of chemotherapy agents on the PBS dataset or a hospital admission with cancer. Incident HF was detected via first hospitalisation with HF as the primary diagnosis or death due to HF. The model was adjusted for age and sex. Results: Of the total cohort (1,114,356 people with DM), 48,014 experienced HF during 6,663,046 person-years of follow up from 2010-2019. Specifically, of 175,656 people with DM and cancer, 8,464 experienced HF during 644,620 person-years of follow up. The HF incidence rate ratio (IRR) of people with DM and cancer was 1.63 (95%CI: 1.59-1.67), compared to people with DM but no cancer. Cancer admission alone had an IRR of 1.97 (1.90-2.05), with an IRR of 1.50 (1.46-1.54) in DM treated with chemotherapy with or without admission. Conclusion: Cancer diagnosis is associated with an increased incidence of HF among people with DM. The higher IRR of people with cancer admission alone supports the association of cancer with HF irrespective of chemotherapy. Further studies controlling for confounders of cardiovascular risk and refinements by age are required to justify grounds for HF screening.