The Modification of Individual Factors on Association Between Serum 25(OH)D and Incident Type 2 Diabetes: Results from a Prospective Cohort Study

Overview

Journal Front Nutr

Specialty Nutritional Sciences

Date 2023 Jan 16

PMID 36643972

Authors

Zhiyong Hu

Xueyuan Zhi

Yiming Ma

Jiafu Li

Jinxiu Wang

Jianliang Zhu

Bingyan Li

Zengli Zhang

Affiliations

Soon will be listed here.

Abstract

Several epidemiological studies have suggested an association between low vitamin D status and increased risk for type 2 diabetes (T2D). This study aimed to explore the dose-response relationship of serum 25-hydroxyvitamin D [25(OH)D] concentrations with incident T2D and the interaction between serum 25(OH)D with individual factors on T2D risk. A total of 1,926 adults without diabetes (mean age: 52.08 ± 13.82 years; 42% men) were prospectively followed for 36 months. Cox proportional hazards model and restricted cubic spline analysis were performed to assess the association and dose-response relationship between serum 25(OH)D and T2D incidence. Both additive and multiplicative interactions were calculated between serum 25(OH)D and individual factors. The net reclassification index (NRI) was used to evaluate the improvement of risk prediction of T2D by adding serum 25(OH)D to traditional risk factors. There were 114 new T2D cases over a mean follow-up of 36 months. Serum 25(OH)D was not associated with T2D incidence, and no significant dose-response relationship was found in the total population. However, stratified analyses suggested a non-linear inverse relationship among individuals with baseline fasting plasma glucose (FPG) <5.6 mmol/L ( = 0.061, = 0.048). And a significant multiplicative interaction was observed between serum 25(OH)D and FPG on T2D risk ( = 0.005). In addition, we found a significant additive interaction of low serum 25(OH)D with older age (RERI = 0.897, 95% CI: 0.080-1.714; AP = 0.468, 95% CI: 0.054-0.881), male (AP = 0.441, 95% CI: 0.010-0.871), and insufficient physical activity (RERI = 0.875, 95% CI: 0.204-1.545; AP = 0.575, 95% CI: 0.039-1.111) on T2D risk. Significant additive interactions were also observed between vitamin D deficiency/insufficiency with male, overweight/obesity, and insufficient physical activity on T2D risk. Moreover, adding low serum 25(OH)D to a model containing established risk factors yielded significant improvements in the risk reclassification of T2D (NRI = 0.205, 95% CI: 0.019-0.391). Our results indicated a non-linear relationship of serum 25(OH)D concentrations with T2D risk among individuals with normal FPG and additive interactions of serum 25(OH)D with gender, overweight/obesity, and physical activity on T2D risk, suggesting the importance of outdoor exercise.

Citing Articles

Vitamin D and suicidality: a Chinese early adolescent cohort and Mendelian randomization study.

Yuan M, Li Y, Chang J, Zhang X, Wang S, Cao L Epidemiol Psychiatr Sci. 2023; 32:e52.

PMID: 37553982 PMC: 10465318. DOI: 10.1017/S2045796023000665.

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