Cited by 521Dementia and Cognitive Impairment ResearchCancer-related cognitive impairment studiesMenopause: Health Impacts and Treatments

Is Diabetes Associated With Cognitive Impairment and Cognitive Decline Among Older Women?

Gregg, Edward W.·2000·Archives of Internal Medicine

Abstract

BACKGROUND: The long-term effect of type 2 diabetes on cognitive function is uncertain. OBJECTIVE: To determine whether older women with diabetes have an increased risk of cognitive impairment and cognitive decline. DESIGN: Prospective cohort study. SETTING: Four research centers in the United States (Baltimore, Md; Portland, Ore; Minneapolis, Minn; and the Monongahela Valley, Pennsylvania). PARTICIPANTS: Community-dwelling white women 65 years and older (n = 9679). MEASUREMENTS: Physician-diagnosed diabetes and other aspects of health history were assessed by interview. Three tests of cognitive function, the Digit Symbol test, the Trails B test, and a modified version of the Mini-Mental State Examination (m-MMSE), were administered at baseline and 3 to 6 years later. Change in cognitive function was defined by the change in the score for each test. Major cognitive decline was defined as the worst 10th percentile change in the score for each test. RESULTS: Women with diabetes (n = 682 [7.0%]) had lower baseline scores than those without diabetes on all 3 tests of cognitive function (Digit Symbol and Trials B tests, P<.01; m-MMSE, P = .03) and experienced an accelerated cognitive decline as measured by the Digit Symbol test (P<.01) and m-MMSE (P = .03). Diabetes was also associated with increased odds of major cognitive decline as determined by scores on the Digit Symbol (odds ratio = 1.63; 95% confidence interval, 1.20-2.23) and Trails B (odds ratio, 1.74; 95% confidence interval, 1.27-2.39) tests when controlled for age, education, depression, stroke, visual impairment, heart disease, hypertension, physical activity, estrogen use, and smoking. Women who had diabetes for more than 15 years had a 57% to 114% greater risk of major cognitive decline than women without diabetes. CONCLUSION: Diabetes is associated with lower levels of cognitive function and greater cognitive decline among older women.

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Crossref · 10.1001/archinte.160.2.174

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  • Six studies reported time-related changes as a continuous variable using either the MMSE or 3MS score in individuals with and without a history of diabetes.

    “Table 2 lists the six studies that reported time-related changes as a continuous variable using either the MMSE or 3MS score in individuals with and without a history of diabetes [49, 51, 52, 54, 65, 69].”
  • At least one included study reported an association between diabetes and cognitive decline even after adjustment for depression.

    “However, at least one of the studies [54] reported an association between diabetes and cognitive decline even after adjustment for depression.”
  • Prospective epidemiological studies show a relationship between cognitive decline and clinical markers associated with hyperglycaemia (e.g., use of glucose-lowering medication, diabetes duration, diabetes complications).

    “Finally, prospective epidemiological studies also show a relationship between cognitive decline and clinical markers associated with hyperglycaemia, e.g. use of glucose-lowering medication, diabetes duration and diabetes complications [46, 48, 49, 54, 56, 64].”

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Authors
Gregg, E. W.
Affiliations
Centers for Disease Control and Prevention (US)
Corresponding author
Gregg, Edward W.
Venue
Archives of Internal Medicine
Published
2000-01-24
Volume
160
Issue
2
Pages
174
ISSN
0003-9926 (ISSN-L)
OpenAlex
W2014788105
Cited by
521
References
43
Citations by year
2026: 2 · 2025: 6 · 2024: 8 · 2023: 7 · 2022: 10 · 2021: 9 · 2020: 17 · 2019: 19 · 2018: 18 · 2017: 16 · 2016: 27 · 2015: 23 · 2014: 33 · 2013: 20 · 2012: 28
FWCI
11.86
Type
journal article
Language
en
Open access
closed
Locations
  • Archives of Internal Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (AM35584)
  • National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR35583, AR 35582, R01AR035582, R01AR035583)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Cancer-related cognitive impairment studies
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Menopause: Health Impacts and Treatments
Keywords
type 2 diabetes, cognitive impairment, cognitive decline, older women, cognitive function, diabetes duration, executive function, Trail Making Test, digit symbol test, Mini-Mental State Examination
MeSH terms
Aged, Aged, 80 and over, Cognition Disorders, Diabetes Mellitus, Type 2, Female, Humans, Longitudinal Studies, Prospective Studies, Risk Factors, Severity of Illness Index, United States, Cohort Studies

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