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. 2022 Mar 25:9:796663.
doi: 10.3389/fpubh.2021.796663. eCollection 2021.

Association Between Triglyceride-Glucose Index and the Risk of Type 2 Diabetes Mellitus in an Older Chinese Population Aged Over 75 Years

Xiaomin Fu  1 , Hongzhou Liu  1   2 , Jing Liu  3 , Nan Li  4 , Lele Li  5 , Dianshan Ke  6 , Minyan Liu  4 , Yanhui Lu  4 , Lihua Duan  7 , Linlin Ma  8 , Yanfei Huo  9 , Qinghua Lei  9 , Shuangtong Yan  4
Affiliations

Association Between Triglyceride-Glucose Index and the Risk of Type 2 Diabetes Mellitus in an Older Chinese Population Aged Over 75 Years

Xiaomin Fu et al. Front Public Health. .

Abstract

Background: The association between the triglyceride-glucose (TyG) index and type 2 diabetes mellitus (T2DM) in older adults has not been fully understood. This research aims to explore the association between the TyG index and the incidence of T2DM in an older Chinese population aged over 75 years.

Methods: This longitudinal analysis study was performed based on a database from a health check screening program in China. The participants were stratified based on the quintile ranges of the TyG index (Q1 to Q5 groups). T2DM was defined as fasting plasma glucose (FPG) ≥ 7.00 mmol/L and/or self-reported T2DM. The cumulative incidences of T2DM in various quintile groups were estimated by the Kaplan-Meier method. The Cox proportional hazard model was used to examine the independent impact of the TyG index on the risk of T2DM during the follow-up period. Subgroup analysis was performed by gender and BMI to further validate the credibility of the results.

Results: During the follow-up period, a total of 231 new-onset T2DM cases were recorded among the 2,571 individuals aged over 75 years. After adjusting confounding factors, elevated TyG index independently indicated a higher risk of T2DM (HR = 1.89; 95% CI, 1.47-2.44; p < 0.01). Higher TyG index quintile groups (Q3 to Q5) also presented with a higher risk of T2DM (hazard ratio (HR) = 1.36, 1.44, and 2.12, respectively) as compared with the lowest quintile group (Q1). Subgroup analysis showed that increased TyG index led to a higher risk of T2DM with HR = 2.35 (95% CI, 1.73-3.19), 1.90 (95% CI, 1.27-2.83), 2.95 (95% CI, 1.94-4.50), and 1.72 (95% CI, 1.25-2.35) in male subgroup, female subgroup, BMI < 24 kg/m2 subgroup, and BMI ≥ 24 kg/m2 subgroup, respectively.

Conclusions: Triglyceride-glucose index independently correlated with the risk of incident T2DM in Chinese adults aged over 75 years. The TyG index might be useful in monitoring T2DM in the older populations.

Keywords: body mass index; older adults; risk; triglyceride–glucose index; type 2 diabetes mellitus.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
The Kaplan–Meier curves depicting the cumulative incident type 2 diabetes mellitus (T2DM) in different quintile groups (Q1 to Q5) of triglyceride-glucose (TyG) index. Each color of lines indicates a quintile group. The color range indicates the 95% confidence internval (CI) range of cumulative incidence of T2DM at a different follow-up time.
See this image and copyright information in PMC

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