Abstract
BACKGROUND: Sodium-glucose cotransporter-2 inhibitors (SGLT2i) and glucagon-like peptide-1 receptor agonists (GLP-1 RAs) are treatments for type 2 diabetes (T2D). Beyond glucose-lowering and cardiorenal protection, these drugs may protect against pneumonia and sepsis. AIMS: This study assesses the impact of SGLT2i and GLP-1 RAs on the risk of incident pneumonia and severe sepsis. METHODS: A retrospective cohort study was conducted using anonymised electronic medical records from TriNetX, a global federated database. Two intention-to-treat analyses were performed, each with two cohorts of adult T2D patients. The first analysis compared individuals prescribed SGLT2i, and the second individuals prescribed GLP-1 RAs, with those prescribed dipeptidyl peptidase-4 inhibitors (DPP-4i). An active comparator new user design was used, with outcomes defined as time-to-incident pneumonia and severe sepsis. Propensity score matching (1:1) was applied to control for potential confounders, and patients were followed for 12 months. Secondary analyses compared SGLT2i and GLP-1 RAs against other glucose-lowering therapies. RESULTS: After propensity score matching, 352 687 patients were included in the SGLT2i versus DPP-4i comparison. SGLT2i treatment was associated with a risk reduction in incident pneumonia (HR 0.75 (95% CI 0.73, 0.78)) and severe sepsis (0.75 (0.73, 0.77)). In the GLP-1 RA versus DPP-4i comparison, 331 863 patients were included. GLP-1 RA treatment was associated with a risk reduction in incident pneumonia (0.60 (0.58, 0.62)) and severe sepsis (0.61 (0.59, 0.63)). CONCLUSION: SGLT2i and GLP-1 RAs are associated with a reduced risk of incident pneumonia and severe sepsis in patients with T2D. Further research and focused randomised controlled trials are warranted to explore the broader clinical implications of these treatments.