Evidence map›Paper›PMID 33402193›Full record

Observational studyAlzheimer's research & therapy2021

The insulin resistance by triglyceride glucose index and risk for dementia: population-based study.

Sangmo Hong, Kyungdo Han, Cheol-Young Park

Abstract readObservational Study
In one paragraph

Observational study in Alzheimer's research & therapy, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 75 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
75citing papers in PubMed, 6 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

75 citing papers in PubMed, 6 syntheses or guidelines pooled it.

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  16. Estimated glucose disposal rate is associated with brain aging and dementia among diabetes-free older adults.The journals of gerontology. Series A, Biological sciences and medical sciences · 2026
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15 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Sangmo HongDepartment of Internal Medicine, Hanyang University, College of Medicine, 222, Wangsimni-ro, Seongdong-gu, Seoul, Republic of Korea.
Kyungdo HanDepartment of Statistics and Actuarial Science, Soongsil University, 369, Sangdo-Ro, Dongjak-Gu, Seoul, Republic of Korea.
Cheol-Young ParkDivision of Endocrinology and Metabolism, Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, 29, Saemunan-ro, Jongno-gu, Seoul, 03181, Republic of Korea. cydoctor@chol.com.ORCID 0000-0002-9415-9965

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundInsulin resistance is suggested to have negative effects on cognition; however, results from large population studies are lacking. In this study, the potential relationships between the triglyceride glucose (TyG) index, a simple surrogate marker of insulin resistance, and dementia were evaluated using a large-scale population dataset.

methodsThis was a retrospective, observational, cohort study using data from the National Health Information Database from 2009 to 2015 and included 5,586,048 participants 40 years age or older. The TyG index was used as a measure of insulin resistance, and participants were divided into quartiles based on TyG index. The incidence of dementia was assessed using hazard ratios (HRs) estimated with Cox proportional hazard modeling.

resultsDuring a median follow-up of 7.21 years, dementia was diagnosed in 142,714 (2.55%) participants. Alzheimer's disease (AD) and vascular dementia (VD) were diagnosed in 74.3% and 12.5% of the participants. Multivariate-adjusted HRs for patients in the TyG index 4th quartile were higher for dementia (HRs = 1.14; 95% confidence interval [CI] 1.12-1.16), AD (HRs = 1.12; 95% CI 1.09-1.14), and VD (HRs = 1.18; 95% CI 1.12-1.23) compared with the 1st quartile of TyG index; however, this had a small effect size (Cohen's d = 0.10, 0.08, and 0.13, respectively). These effects were independent of age, sex, smoking status, physical activity, body mass index, systolic blood pressure, and total cholesterol.

conclusionIn this large population study, TyG index was associated with an increased risk of dementia, including AD and VD, that was independent of traditional cardiovascular risk factors, although the effect size of the TyG index was small.

Indexed as

DementiaInsulin ResistanceBiomarkersBlood GlucoseCohort StudiesGlucoseHumansTriglyceridesBiomarkersBlood GlucoseGlucoseTriglyceridesAlzheimer’s diseaseDementiaDementia, vascularInsulin resistanceTyG index

Identifiers

PMID33402193
PMCPMC7786939

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Registered trials

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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.