Long-Term Mortality and SGLT2 Inhibitors in Type 2 Diabetes with and without Renal Impairment: An Observational
Abdullah Al-Muhaiteeb1, Barrak Alahmad2,3, Mohamed Abu-Farha4
1Division of Nephrology, Al Amiri Hospital, Kuwait City, Kuwait.
Aim:
Sodium-glucose co-transporter 2 (SGLT2) inhibitors have emerged as a vital part of management of type 2 diabetes, as they have been shown to have both cardiovascular and renal benefits along with an improved survival rate in several randomized clinical trials. We designed a retrospective cohort study to investigate the impact of SGLT2 inhibitors on mortality among type 2 diabetes patients.
Methods:
Patients with type 2 diabetes who presented to the Dasman Diabetes Institute in Kuwait were followed from January 1st, 2015, until January 20th, 2023. To control for non-random allocation of SGLT2 inhibitors and measured confounders, we performed one-to-one propensity score matching and evaluated outcomes in the matched cohorts using a Cox proportional hazards model. The primary treatment variable was SGLT2 inhibitor use; time to mortality from any cause was used as the outcome of interest.
Results:
1,551 patients were taking SGLT2 inhibitors, and 1,687 patients were not. After propensity score matching, 845 patients were on SGLT2 inhibitors, and 845 patients were not. In post-matching analysis, all-cause mortality was higher among patients who did not take SGLT2 inhibitors compared to patients taking SGLT2 inhibitors (5.2 vs. 2.1%, p = 0.0012). The hazard ratio of all-cause mortality in patients taking SGLT2 inhibitors was 0.42 (95% confidence interval [95% CI], 0.24-0.72). Additional adjustment of matching factors did not change the results.
Conclusion:
This observational study demonstrated substantial long-term reduction in mortality risk among patients with type 2 diabetes treated with SGLT2 inhibitors. This is irrespective of the stage of their renal diseases or GLP1 agonist.
Insights
Sodium-glucose co-transporter 2 (SGLT2) inhibitors significantly reduce mortality in type 2 diabetes patients. This study found SGLT2 inhibitors lowered the risk of death, regardless of kidney disease stage or other medications.
Area of Science:
- Endocrinology and Metabolism
- Cardiovascular Medicine
- Nephrology
Background:
- Sodium-glucose co-transporter 2 (SGLT2) inhibitors are increasingly used for type 2 diabetes management.
- Previous trials indicate cardiovascular and renal benefits, alongside improved survival rates.
Purpose of the Study:
- To investigate the impact of SGLT2 inhibitors on all-cause mortality in patients with type 2 diabetes.
- To assess the long-term reduction in mortality risk associated with SGLT2 inhibitor use.
Main Methods:
- Retrospective cohort study design.
- Propensity score matching (1:1) to control for confounders.
- Cox proportional hazards model to evaluate mortality outcomes.
Main Results:
- After matching, 845 patients were on SGLT2 inhibitors and 845 were not.
- All-cause mortality was significantly lower in the SGLT2 inhibitor group (2.1% vs. 5.2%).
- Hazard ratio for all-cause mortality with SGLT2 inhibitors was 0.42 (95% CI, 0.24-0.72).
Conclusions:
- SGLT2 inhibitors demonstrate a substantial long-term reduction in mortality risk for type 2 diabetes patients.
- The observed mortality benefit is independent of renal disease stage or concurrent GLP1 agonist use.
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Glucose Transporters
Facilitated diffusion-glucose transporters (GLUTs) are encoded by the solute-linked carrier (SLC) family 2, subfamily A gene family, or SLC2A. The 14 GLUT protein members are distributed into three classes:


