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Factors associated with A1C reduction with GLP-1 agonist or SGLT-2 inhibitor use.

Family Practice 2021 March 24
BACKGROUND: While use of glucagon-like peptide-1 (GLP-1) agonists and sodium-glucose cotransporter-2 (SGLT-2) inhibitors reduces the risk of atherosclerotic cardiovascular disease outcomes and lowers glycosylated haemoglobin (A1C), evidence on patient characteristics associated with clinically relevant A1C reduction is lacking.

OBJECTIVE: The objective of this retrospective cohort study was to identify patient characteristics associated with A1C reduction with initial GLP-1 or SGLT-2 use.

METHODS: Patients with type 2 diabetes and a baseline A1C ≥7% who were dispensed a GLP-1 or SGLT-2 between 01/01/10 and 12/31/17 were included. Patients were categorized as having a ≥1% or <1% A1C reduction during the 90-365 days after GLP-1/SGLT-2 initiation. Patient characteristics were collected during the 180 days prior to initiation. Multivariable logistic and linear regression modelling was performed to identify characteristics associated with a ≥1% A1C reduction and absolute change in A1C, respectively.

RESULTS: Five hundred and seventy-two patients were included with 261 (46%) and 311 (54%) having and not having an ≥1% A1C reduction. Patients were primarily middle-aged, female, white, non-Hispanic and had a high burden of chronic disease. Characteristics associated with a ≥1% A1C reduction included: GLP-1/SGLT-2 persistence, congestive heart failure comorbidity, phentermine dispensing, care management team (CMT) enrollee and higher baseline A1C. Characteristics associated with absolute A1C reduction included: age, baseline A1C, CMT enrollee, GLP-1/SGLT-2 persistence and a phentermine dispensing.

CONCLUSIONS: The results of this study provide practitioners with guidance on the patients who are most likely to have a clinically relevant A1C reduction with GLP-1 or SGLT-2 use.

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