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Published on: February 28, 2013
Glucose-Lowering Medication Classes and Cardiovascular Outcomes in Patients With Type 2 Diabetes
Romain Neugebauer1, Jaejin An2, Sarah Krahe Dombrowski3
1Division of Research, Kaiser Permanente Northern California, Pleasanton.
Insights
Major adverse cardiovascular events (MACEs) risk is lowest with glucagon-like peptide-1 receptor agonists (GLP-1RAs) and sodium-glucose cotransporter-2 inhibitors (SGLT2is) in type 2 diabetes (T2D) patients. Benefits vary by patient characteristics, informing personalized treatment strategies.
Area of Science:
- Cardiology
- Endocrinology
- Pharmacology
Background:
- Major adverse cardiovascular events (MACEs) are a leading cause of death in type 2 diabetes (T2D).
- Limited head-to-head trials and inadequate bias adjustment in observational studies hinder comparative effectiveness research of glucose-lowering medications on MACEs.
Purpose of the Study:
- To compare the effectiveness of four glucose-lowering medication classes—sulfonylureas, dipeptidyl peptidase-4 inhibitors (DPP4is), sodium-glucose cotransporter-2 inhibitors (SGLT2is), and glucagon-like peptide-1 receptor agonists (GLP-1RAs)—on MACEs in US adults with T2D.
- To utilize modern causal inference methods and machine learning for robust bias adjustment in this comparative effectiveness study.
Main Methods:
- A comparative effectiveness study involving 241,981 adults with T2D initiated on one of four medication classes (sulfonylureas, DPP4is, SGLT2is, GLP-1RAs) between 2014-2021.
- Employed targeted learning within a trial emulation framework to analyze MACEs (nonfatal myocardial infarction, nonfatal stroke, cardiovascular death).
- Assessed heterogeneity of treatment effects across prespecified subgroups.
Main Results:
- Sustained exposure to GLP-1RAs was associated with the lowest 2.5-year MACE risk, followed by SGLT2is, sulfonylureas, and DPP4is.
- The cumulative risk difference between SGLT2is and GLP-1RAs was 1.5% (95% CI, 1.1%-1.9%).
- Benefits of GLP-1RAs over SGLT2is were most pronounced in patients with baseline atherosclerotic cardiovascular disease (ASCVD), heart failure (HF), older age (≥65 years), or moderate kidney impairment.
Conclusions:
- Medication class significantly impacts MACE risk in T2D patients, with GLP-1RAs and SGLT2is offering the most protection.
- The comparative benefit of GLP-1RAs versus SGLT2is is influenced by patient factors like age, ASCVD, HF, and kidney function.
- These findings, alongside cost and clinical considerations, can guide personalized treatment decisions for T2D management.
Importance:
Major adverse cardiovascular events (MACEs) are primary causes of morbidity and mortality in adults with type 2 diabetes (T2D), yet few head-to-head randomized trials have compared the effects of glucose-lowering medications on MACEs, and most observational analyses are limited by inadequate bias adjustment methods.
Objective:
To compare the effectiveness of sustained exposure to 4 classes of glucose-lowering medications (sulfonylureas, dipeptidyl peptidase-4 inhibitors [DPP4is], sodium-glucose cotransporter-2 inhibitors [SGLT2is], and glucagon-like peptide-1 receptor agonists [GLP-1RAs]) on MACEs in US adults with T2D using modern causal methods combined with machine learning.
Design, Setting, And Participants:
This comparative effectiveness study included adults with T2D who were members of 6 large US health care delivery systems and initiated treatment with 1 of 4 medication classes (sulfonylureas, DPP4is, SGLT2is, and GLP-1RAs) between January 1, 2014, and December 31, 2021. Data analysis was conducted from May 1 to December 31, 2024.
Exposure:
New use of a sulfonylurea, DPP4i, SGLT2i, or GLP-1RA based on filled prescriptions.
Main Outcomes And Measures:
The primary outcome was MACEs defined as nonfatal myocardial infarction, nonfatal stroke, or cardiovascular death. Analyses were conducted using targeted learning within a trial emulation framework. Heterogeneity of treatment effects was assessed for prespecified subgroups.
Results:
This study included 296 676 adults. The cohort for emulating a 4-arm trial included a subset of 241 981 adults (mean [SD] age, 57.2 [12.9] years; 54.3% male) with T2D. In adjusted analyses, 2.5-year MACE risk was lowest in patients with sustained exposure to GLP-1RAs, followed by SGLT2is , sulfonylureas, and DPP4is. Comparing DPP4is with sulfonylureas and SGLT2is with GLP-1RAs, the 2.5-year cumulative risk difference was 1.9% (95% CI, 1.1%-2.7%) and 1.5% (1.1%-1.9%), respectively. Risk differences in patients with vs without atherosclerotic cardiovascular disease (ASCVD) were similar in direction but typically much smaller for patients without ASCVD. Evidence of a benefit of GLP-1RAs over SGLT2is was most pronounced in patients with baseline ASCVD or heart failure (HF), age 65 years or older, or low to moderate kidney impairment but was not found in patients younger than 50 years.
Conclusions And Relevance:
In this study, MACE risk varied significantly by medication class, with most protection achieved with sustained treatment with GLP-1RAs followed by SGLT2is, sulfonylureas, and DPP4is. The magnitude of benefit of GLP-1RAs over SGLT2is depended on baseline age, ASCVD, HF, and kidney impairment. These results, along with consideration of cost, availability, and collateral clinical benefits, may inform treatment decisions for adults with T2D.
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