Cited by 333Retinal Diseases and TreatmentsDiabetes Management and ResearchDiabetes Treatment and Management

Effect of intensive diabetes therapy on the progression of diabetic retinopathy in patients with type 1 diabetes: 18 years of follow-up in the DCCT/EDIC

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The Diabetes Control and Complications Trial (DCCT)/Epidemiology of Diabetes Interventions and Complications (EDIC) Research Group·2015·Diabetes

Abstract

The Diabetes Control and Complications Trial (DCCT) demonstrated that a mean of 6.5 years of intensive therapy aimed at near-normal glucose levels reduced the risk of development and progression of retinopathy by as much as 76% compared with conventional therapy. The Epidemiology of Diabetes Interventions and Complications study (EDIC) observational follow-up showed that the risk of further progression of retinopathy 4 years after the DCCT ended was also greatly reduced in the former intensive group, despite nearly equivalent levels of HbA1c, a phenomenon termed metabolic memory. Metabolic memory was shown to persist through 10 years of follow-up. We now describe the risk of further progression of retinopathy, progression to proliferative diabetic retinopathy, clinically significant macular edema, and the need for intervention (photocoagulation or anti-VEGF) over 18 years of follow-up in EDIC. The cumulative incidence of each retinal outcome continues to be lower in the former intensive group. However, the year-to-year incidence of these outcomes is now similar, owing in large part to a reduction in risk in the former conventional treatment group.

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  • Both DCCT/EDIC and UKPDS suggested that there is metabolic memory, or a legacy effect, in which a finite period of intensive glucose lowering yielded benefits that extended for decades after that period ended.

    “Both DCCT/EDIC and UKPDS suggested that there is metabolic memory, or a legacy effect, in which a finite period of intensive glucose lowering yielded benefits that extended for decades after that period ended (44-48).”

    From 6. Glycemic Goals, Hypoglycemia, and Hyperglycemic Crises: Standards of Care in Diabetes-2026. (2026) · cites this paper as [45]

    The Discussion reports that 6.5 years of intensive therapy during DCCT produced a sustained reduction in cumulative retinopathy progression through up to 18 years of EDIC follow-up, consistent with metabolic memory. It does not establish benefits lasting for multiple decades after treatment ended; it also says the risk reduction diminished during years 10–18. (LLM, conf=0.83)

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  • Follow-up of the DCCT cohorts in the Epidemiology of Diabetes Interventions and Complications (EDIC) study demonstrated persistence of microvascular benefits over two decades despite the fact that the glycemic separation between the treatment groups diminished and disappeared during follow-up.

    “Follow-up of the DCCT cohorts in the Epidemiology of Diabetes Interventions and Complications (EDIC) study (44,45) demonstrated persistence of these microvascular benefits over two decades despite the fact that the glycemic separation between the treatment groups diminished and disappeared during follow-up.”
  • Follow-up of the DCCT cohorts in the Epidemiology of Diabetes Interventions and Complications (EDIC) study demonstrated persistence of these microvascular benefits over two decades despite the fact that the glycemic separation between the treatment groups diminished and disappeared during follow-up.

    “Follow-up of the DCCT cohorts in the Epidemiology of Diabetes Interventions and Complications (EDIC) study (42,43) demonstrated persistence of these microvascular benefits over two decades despite the fact that the glycemic separation between the treatment groups diminished and disappeared during follow-up.”

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Authors
The Diabetes Control and Complications Trial (DCCT)/Epidemiology of Diabetes Interventions and Complications (EDIC) Research Group
Corresponding author
The Diabetes Control and Complications Trial (DCCT)/Epidemiology of Diabetes Interventions and Complications (EDIC) Research Group
Venue
Diabetes
Published
2014-09-09
Volume
64
Issue
2
Pages
631-642
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2173163930
Cited by
333
References
21
Citations by year
2026: 19 · 2025: 23 · 2024: 23 · 2023: 26 · 2022: 36 · 2021: 34 · 2020: 32 · 2019: 29 · 2018: 25 · 2017: 36 · 2016: 23 · 2015: 27
FWCI
26.81
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (UL1TR000142)
  • National Institute of Diabetes and Digestive and Kidney Diseases (U01DK094176, P30DK092950)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
diabetic retinopathy, type 1 diabetes, tight glycemic control, metabolic memory, retinopathy progression, proliferative diabetic retinopathy, clinically significant macular edema, photocoagulation, anti-VEGF therapy, long-term follow-up, DCCT/EDIC
MeSH terms
Adolescent, Adult, Aging, Diabetes Mellitus, Type 1, Diabetic Retinopathy, Drug Administration Schedule, Female, Glycated Hemoglobin, Humans, Insulin, Male, Middle Aged, Risk Factors, Young Adult

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