Type 2 & other diabetes

Differences in Prevalence and Incidence of Electrocardiogram Abnormalities and Cardiovascular Autonomic Neuropathy Among Randomized Glucose-Lowering Treatments in Early Type 2 Diabetes: The Glycemia Reduction Approaches in Diabetes (GRADE) Cohort

Diabetes CarePublished Secondary analysis of the GRADE randomised trial

Authors' conclusion

ECG abnormalities, including those reflecting CAN, are common in individuals with T2D <10 years and more so in those with certain cardiovascular risk factors. The development of major ECG abnormalities may be lower with liraglutide.

Study context

Population
Adults with T2D <10 years taking metformin alone; mean age 57.2 ± 10.0 years, 36.3% women, mean diabetes duration 4.3 ± 2.8 years, mean HbA1c 7.5 ± 0.5%
Participants
4,769 adults
Comparison
Insulin glargine vs glimepiride vs liraglutide vs sitagliptin added to metformin
Primary endpoint
Prevalence and incidence of ECG abnormalities and ECG-derived CAN
Follow-up
Baseline, 2 and 4 years
Methodological detailslogistic repeated-measures models adjusted for baseline risk factors
  • Logistic repeated-measures models adjusted for baseline risk factors

Primary result

As reported in the abstract

Prevalence and incidence of ECG abnormalities and CAN

Electrocardiogram (ECG) abnormalities at baseline

57.1%

ECG-derived cardiovascular autonomic neuropathy (CAN) at baseline

52.8%

Further findings

OutcomeLiraglutideP value
Major ECG abnormalities · year 4Liraglutide vs Nonliraglutide · fewer with liraglutide9%P = 0.03
Heart rate variability (HRV): SD of normal-to-normal R-R intervals · year 2 · Liraglutide vs Nonliraglutide · higher with liraglutide
P = 0.02
  • Major ECG abnormalities: Nonliraglutide 13%

Characteristics of participants with baseline ECG abnormalities and CAN

Older and more severe cardiovascular risk factors

Original publication

Differences in Prevalence and Incidence of Electrocardiogram Abnormalities and Cardiovascular Autonomic Neuropathy Among Randomized Glucose-Lowering Treatments in Early Type 2 Diabetes: The Glycemia Reduction Approaches in Diabetes (GRADE) Cohort. Diabetes Care. Published 23 September 2025. doi:10.2337/dc25-1087

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