Trial reportThe lancet. Diabetes & endocrinology2021
Cognitive performance declines in older adults with type 1 diabetes: results from 32 years of follow-up in the DCCT and EDIC Study.
Trial report in The lancet. Diabetes & endocrinology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 70 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
70 citing papers in PubMed, 1 synthesis or guideline pooled it, 124 citations in OpenAlex.
- The cross-sectional and longitudinal relationship of diabetic retinopathy to cognitive impairment: a systematic review and meta-analysis.Eye (London, England) · 2023Pooled it
- Automated Insulin Delivery in Older Adults with Type 1 Diabetes.NEJM evidence · 2025Trial
- Risk factors associated with cognitive performance and cognitive impairment in older adults with type 1 diabetes: Data from the Wireless Innovation for Seniors with Diabetes Mellitus (WISDM) study.Journal of diabetes and its complications · 2024Trial
- Patterns of Regional Brain Atrophy and Brain Aging in Middle- and Older-Aged Adults With Type 1 Diabetes.JAMA network open · 2023Trial
- A parallel randomised controlled trial of the Hypoglycaemia Awareness Restoration Programme for adults with type 1 diabetes and problematic hypoglycaemia despite optimised self-care (HARPdoc).Nature communications · 2022Trial
- Age of Type 1 Diabetes Onset and Dementia Risk: A Swedish Nationwide, Register-Based Cohort Study.Diabetes, obesity & metabolism · 2026Article
- Article
- Reduced cortical gyrification in type 1 diabetes is associated with white matter integrity loss and cognitive decline.Metabolic brain disease · 2026Article
- Quality of Life and Humanistic Burden of Adults with Type 1 Diabetes with Recurrent Severe Hypoglycemic Events and Impaired Awareness of Hypoglycemia Using a Continuous Glucose Monitor.Diabetes therapy : research, treatment and education of diabetes and related disorders · 2026Article
- Clinical and Metabolic Predictors of Cognitive Impairment in Type 1 Diabetes: The Role of Peripheral Neuropathy and Hypoglycaemia Unawareness. Findings From a HAD-1 Study.Diabetes/metabolism research and reviews · 2026Article
- Type 1 diabetes, ageing and frailty: an underexplored intersection.Diabetologia · 2026Review
- Preparing to Meet the Needs of a Growing Older Adult Population with Type 1 Diabetes: A Narrative Review.Journal of general internal medicine · 2026Review
- The virtual Morris water maze for cognitive function assessment in adolescents with type 1 diabetes.Diabetologia · 2026Article
- Sex Differences in the Association Between Body Composition and Cognitive Performance in Adolescents With Type 1 Diabetes.Diabetes/metabolism research and reviews · 2026Observational
- Independent and combined associations of diabetes and thyroid disorders with risks of incident dementia.Frontiers in endocrinology · 2026Article
- 13. Older Adults: Standards of Care in Diabetes-2026.Diabetes care · 2026Review
- 5. Facilitating Positive Health Behaviors and Well-being to Improve Health Outcomes: Standards of Care in Diabetes-2026.Diabetes care · 2026Review
- 4. Comprehensive Medical Evaluation and Assessment of Comorbidities: Standards of Care in Diabetes-2026.Diabetes care · 2026Review
- 6. Glycemic Goals, Hypoglycemia, and Hyperglycemic Crises: Standards of Care in Diabetes-2026.Diabetes care · 2026Review
- All-cause and cause-specific mortality in older people with and without diabetes in Norwegian home care services: a nationwide registry study.BMC geriatrics · 2025Article
10 more citing papers are in PubMed but not listed here.
Corrections and comments
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Authors and funding
13 authors at 8 institutions in 1 country.
Funding
Abstract
backgroundWith improved treatment, individuals with type 1 diabetes are living longer but there is limited information on the effects of type 1 diabetes on cognitive ability as they become older adults. We followed up individuals with type 1 diabetes to identify independent risk factors for cognitive decline as people age.
methods1051 participants with type 1 diabetes enrolled in the Diabetes Control and Complications Trial (DCCT) and its follow-up Epidemiology of Diabetes Interventions and Complications (EDIC) study. Participants completed cognitive assessments at baseline (median age 27 years) and 2, 5, 18, and 32 years later (median age 59). HbA
findingsOver 32 years of follow-up, we found substantive declines in memory and psychomotor and mental efficiency. Between 18 and 32 years of follow-up, the decline in psychomotor and mental efficiency was five times larger than the change from baseline to year 18. Independent of the other risk factors and comorbidities, exposure to higher HbA
interpretationCognitive function declines with ageing in type 1 diabetes. The association of glycaemia and blood pressure levels with cognitive decline suggests that better management might preserve cognitive function.
fundingUnited States National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Disease.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.