Cited by 4,762Diabetes Treatment and ManagementDiabetes Management and ResearchDiabetes, Cardiovascular Risks, and Lipoproteins

Glucose control and vascular complications in veterans with type 2 diabetes

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Duckworth, William, Abraira, Carlos, Moritz, Thomas, Reda, Domenic, Emanuele, Nicholas, Reaven, Peter D., Zieve, Franklin J., Marks, Jennifer +8 more·2009·New England Journal of Medicine

Abstract

BACKGROUND: The effects of intensive glucose control on cardiovascular events in patients with long-standing type 2 diabetes mellitus remain uncertain. METHODS: We randomly assigned 1791 military veterans (mean age, 60.4 years) who had a suboptimal response to therapy for type 2 diabetes to receive either intensive or standard glucose control. Other cardiovascular risk factors were treated uniformly. The mean number of years since the diagnosis of diabetes was 11.5, and 40% of the patients had already had a cardiovascular event. The goal in the intensive-therapy group was an absolute reduction of 1.5 percentage points in the glycated hemoglobin level, as compared with the standard-therapy group. The primary outcome was the time from randomization to the first occurrence of a major cardiovascular event, a composite of myocardial infarction, stroke, death from cardiovascular causes, congestive heart failure, surgery for vascular disease, inoperable coronary disease, and amputation for ischemic gangrene. RESULTS: The median follow-up was 5.6 years. Median glycated hemoglobin levels were 8.4% in the standard-therapy group and 6.9% in the intensive-therapy group. The primary outcome occurred in 264 patients in the standard-therapy group and 235 patients in the intensive-therapy group (hazard ratio in the intensive-therapy group, 0.88; 95% confidence interval [CI], 0.74 to 1.05; P=0.14). There was no significant difference between the two groups in any component of the primary outcome or in the rate of death from any cause (hazard ratio, 1.07; 95% CI, 0.81 to 1.42; P=0.62). No differences between the two groups were observed for microvascular complications. The rates of adverse events, predominantly hypoglycemia, were 17.6% in the standard-therapy group and 24.1% in the intensive-therapy group. CONCLUSIONS: Intensive glucose control in patients with poorly controlled type 2 diabetes had no significant effect on the rates of major cardiovascular events, death, or microvascular complications with the exception of progression of albuminuria (P = 0.01) [added]. (ClinicalTrials.gov number, NCT00032487.)

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Crossref · 10.1056/nejmoa0808431

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  • Glucose and BP optimization are proven for primary prevention and slowing of nonproliferative retinopathy.

    “Optimization of glucose and BP are the proven strategies for primary prevention of diabetic retinopathy and for slowing the progression of preexisting nonproliferative retinopathy.78,185,186,193,522,523”

    From American Association of Clinical Endocrinology Clinical Practice Guideline: Developing a Diabetes Mellitus Comprehensive Care Plan-2022 Update. (2022) · cites this paper as [78]

    The Microvascular Results (page not available in our copy) report no significant difference in new-onset retinopathy or progression to proliferative retinopathy between intensive and standard glucose-control groups; the trend in retinopathy severity was also nonsignificant. This trial therefore does not establish the claimed prevention or slowing of retinopathy through glucose optimization. It did not test blood-pressure optimization as a retinopathy intervention. (LLM, conf=0.86)

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  • The Look AHEAD randomized clinical trial reported that a long-term behavioral weight loss intervention compared with diabetes self-management education and support resulted in no difference between groups for the primary cardiovascular outcome over a median of 9.6 years of follow-up.

    “The Action for Health in Diabetes (Look AHEAD) randomized clinical trial (including 5145 overweight persons with type 2 diabetes) reported that a long-term behavioral weight loss intervention including a goal of at least 175 minutes per week of moderate-intensity physical activity, compared with diabetes self-management education and support, resulted in no difference between groups for the”

    From Diagnosis and Treatment of Type 2 Diabetes in Adults (2025) · cites this paper as [35]

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  • Glycaemic control alone does not fully explain the reduction in cardiovascular mortality associated with GLP-1RAs.

    “Whilst indirect effects such as improved glycaemic control are likely to be important, glycaemic control alone does not fully explain the reduction in cardiovascular mortality associated with GLP-1RAs. 75”

    From <scp>Glucagon‐like peptide‐1 receptor agonists</scp> improve biomarkers of inflammation and oxidative stress: A systematic review and meta‐analysis of randomised controlled trials (2021) · cites this paper as [75]

    The Discussion says intensive glucose control did not reduce cardiovascular events in patients with previously diagnosed type 2 diabetes, supporting the general point that glucose control alone may not account for cardiovascular benefit. The paper does not assess GLP-1RAs or explain any reduction in cardiovascular mortality associated with them. Page numbers are not available in our copy. (LLM, conf=0.85)

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  • The risks of intensive glycemic control may be avoided by using agents not associated with hypoglycemia, especially in people with frequent severe hypoglycemia, hypoglycemia unawareness, long diabetes duration, advanced atherosclerosis, advanced age, or terminal illness.

    “The potential risks of intensive glycemic control may be obviated by incorporating agents that are not associated with hypoglycemia, especially in persons with frequent severe hypoglycemia, hypoglycemia unawareness, or a very long duration of DM, and particularly in the presence of established and advanced atherosclerosis, advanced age, and terminal illness.69,70,76–81”

    From American Association of Clinical Endocrinology Clinical Practice Guideline: Developing a Diabetes Mellitus Comprehensive Care Plan-2022 Update. (2022) · cites this paper as [78]

    The Results report more hypoglycemic episodes and serious adverse events with intensive therapy, and the Discussion suggests that avoiding severe hypoglycemia may matter when intensifying control earlier in diabetes. The paper does not establish that agents without hypoglycemia risk would avert those harms, or make that recommendation for the listed groups, including people with hypoglycemia unawareness, advanced atherosclerosis, advanced age, or terminal illness. The indexed passages provide no page numbers. (LLM, conf=0.86)

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  • Intensive glucose control (A1C <7% in T2D, <7.5% in T1D) lowers risk of incident albuminuria and DKD onset.

    “Intensive glucose control (A1C levels <7% in T2D and <7.5% in T1D) in several clinical trials was found to reduce the risk of incident albuminuria (A2) and DKD onset.70,78,90,406–410”

    From American Association of Clinical Endocrinology Clinical Practice Guideline: Developing a Diabetes Mellitus Comprehensive Care Plan-2022 Update. (2022) · cites this paper as [78]

    Table 3 (Discussion; page not provided) reports fewer transitions from normal albumin excretion to micro- or macroalbuminuria with intensive treatment in veterans with type 2 diabetes (10.0% versus 14.7%, P=0.03), and the intensive group's median A1C was 6.9%. The study did not include people with type 1 diabetes, and it found no significant reduction in severe nephropathy; it therefore does not establish the claim about T1D or DKD onset broadly. (LLM, conf=0.89)

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Authors
Duckworth, W., Abraira, C., Moritz, T., Reda, D., Emanuele, N., Reaven, P. D., Zieve, F. J., Marks, J., Davis, S. N., Hayward, R., Warren, S. R., Goldman, S., McCarren, M., Vitek, M. E., Henderson, W. G., & Huang, G. D.
Affiliations
  • Phoenix VA Health Care System (US)
  • Miami VA Healthcare System (US)
  • Edward Hines, Jr. VA Hospital (US)
  • Hunter Holmes McGuire VA Medical Center (US)
  • VA Tennessee Valley Healthcare System (US)
  • VA Ann Arbor Healthcare System (US)
  • Southern Arizona VA Health Care System (US)
  • VA Office of Research and Development (US)
Venue
New England Journal of Medicine
Published
2009-01-08
Volume
360
Issue
2
Pages
129-139
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2158666727
Cited by
4,762
References
27
Citations by year
2026: 75 · 2025: 90 · 2024: 150 · 2023: 164 · 2022: 168 · 2021: 244 · 2020: 268 · 2019: 265 · 2018: 279 · 2017: 325 · 2016: 320 · 2015: 317 · 2014: 381 · 2013: 349 · 2012: 364
FWCI
239.94
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Diabetes Association
  • U.S. Department of Veterans Affairs
  • Eli Lilly and Company
  • Pfizer
  • Amylin Pharmaceuticals
  • GlaxoSmithKline
  • Sanofi
  • Office of Research and Development
  • MannKind Corporation
  • Novo Nordisk
  • National Eye Institute
  • National Institute of Diabetes and Digestive and Kidney Diseases (P30DK079637)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
type 2 diabetes, tight glycemic control, glycemic control, veterans, cardiovascular events, HbA1c, microvascular complications, albuminuria, hypoglycemia, cardiovascular mortality, long-standing diabetes
MeSH terms
Rosiglitazone, Blood Glucose, Cardiovascular Diseases, Diabetes Mellitus, Type 2, Diabetic Angiopathies, Diabetic Neuropathies, Drug Therapy, Combination, Female, Follow-Up Studies, Glycated Hemoglobin, Humans, Hypoglycemic Agents, Insulin, Male, Metformin, Middle Aged, Sulfonylurea Compounds, United States, Veterans, Thiazolidinediones, Kaplan-Meier Estimate

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