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Original Articles
Associations of fasting glucose and glycated hemoglobin with vitamin D levels according to diabetes mellitus status in Korean adults
Yerin Hwang, Jiyoung Jang, Myung-Hee Shin
Epidemiol Health. 2022;44:e2022025.   Published online February 21, 2022
DOI: https://doi.org/10.4178/epih.e2022025
  • 8,133 View
  • 347 Download
AbstractAbstract AbstractSummary PDFSupplementary Material
Abstract
OBJECTIVES
According to previous studies, vitamin D deficiency might increase the risk of type 2 diabetes mellitus (DM). However, few studies have examined whether vitamin D continues to affect glucose control after DM diagnosis. Therefore, we examined the association between vitamin D and glucose levels in individuals with and without DM.
METHODS
We analyzed data for 32,943 adults aged 19 years and older from the 2008 to 2014 Korea National Health and Nutrition Examination Survey. Patients were classified into 3 groups according to the 25-hydroxyvitamin D concentration. DM was defined as a fasting glucose level ≥126 mg/dL, current use of DM medications or insulin injections, or a self-reported diagnosis of DM by a doctor.
RESULTS
In male DM patients, the hemoglobin A1c (HbA1c) level increased significantly as vitamin D levels became severely deficient. In male and postmenopausal female with abnormal HbA1c, those with severe vitamin D deficiency had significantly higher HbA1c levels (p for trend=0.004 and 0.022 for male and postmenopausal female, respectively). Significant differences were found between participants with normal and abnormal HbA1c levels in both male and female. However, regardless of sex or menopausal status, there was no significant association between vitamin D and fasting glucose in any of the fasting glucose subgroups.
CONCLUSIONS
Male and female with abnormal HbA1c levels showed markedly elevated blood glucose when they also had vitamin D deficiency. A more distinct difference was observed in the HbA1c subgroups than in the fasting glucose subgroups.
Summary
Korean summary
당화혈색소 비정상군에서 비타민 D가 부족할수록 혈당의 상승을 보였다. 현재까지 비타민 D와 혈당 조절과 관련하여 한국인을 대상으로 한 연구는 매우 미비한 상황이며, 한국인을 대상으로 한 연구 결과를 반영한 당뇨병 환자들의 혈당 조절 관리 지침 마련이 필요하다.
Key Message
Guidelines are needed for managing glucose control in DM patients that reflect the results of this research performed among Koreans. Additional large-scale longitudinal studies should be conducted to clarify the causal relationships underlying this association.
Comparison of Prevalence of Metabolic Syndrome Between Korean Emigrants and Host Country Residents in Japan and China-The Korean Emigrant Study
Myung-Hee Shin, Mi Kyung Kim, Zhong Min Li, Hyun-Kyung Oh, Soo Ryang Kim, Miyuki Taniguchi, Jinnv Fang
Epidemiol Health. 2010;32:e2010005.   Published online May 7, 2010
DOI: https://doi.org/10.4178/epih/e2010005
  • 16,398 View
  • 116 Download
  • 4 Crossref
AbstractAbstract PDF
Abstract
<sec><title>OBJECTIVES</title><p>This study aims to compare the prevalence of metabolic syndrome between Korean emigrants (KEs) and their host country residents in Japan and China.</p></sec><sec><title>METHODS</title><p>The Korean Emigrant Study (KES) is a cohort study initiated in 2005 to elucidate the effect of genetic susceptibility and environmental change on hypertension, diabetes, and metabolic syndrome. Equal numbers of KEs and host country residents, aged 30 or over, were recruited from three regions; Kobe-Osaka in Japan (total number=965), Yanbian in China (n=1,019), and Changchun in China (n=949).</p></sec><sec><title>RESULTS</title><p>The age-adjusted prevalences of metabolic syndrome among KEs in Kobe-Osaka were significantly higher than those among Japanese (in men 24.0% vs. 15.6%, p=0.04, in women 8.4% vs. 2.7%, p=0.01), while the age-adjusted prevalences among KEs in Changchun were similar to those among Chinese (in men 11.7% vs. 16.1%, p=0.37, in women 28.3% vs. 30.1%, p=0.91). The age-adjusted prevalences were generally higher in Yanbian than other regions, and KEs had higher prevalence than Chinese in men but not in women (in men 37.9% vs. 28.3%, p=0.03, women 46.0% vs. 50.6%, p=0.44). The components with significant ethnic differences in prevalence were high blood pressure and abdominal obesity in Japan, and triglyceride in China. The most influential component in diagnosing metabolic syndrome was abdominal obesity in men and triglyceride in women.</p></sec><sec><title>CONCLUSION</title><p>The prevalence of metabolic syndrome was higher in KEs than in host country residents in Japan but not in China. Abdominal obesity and triglyceride are both discriminating and influential components in metabolic syndrome.</p></sec>
Summary

Citations

Citations to this article as recorded by  
  • New Common and Rare Variants Influencing Metabolic Syndrome and Its Individual Components in a Korean Population
    Ho-Sun Lee, Yongkang Kim, Taesung Park
    Scientific Reports.2018;[Epub]     CrossRef
  • Cohort Profile: The Korean Genome and Epidemiology Study (KoGES) Consortium
    Yeonjung Kim, Bok-Ghee Han
    International Journal of Epidemiology.2017; 46(2): e20.     CrossRef
  • Is There Disparity in Cardiovascular Health Between Migrant Workers and Native Workers?
    Hyeonkyeong Lee, Sunghye Cho, Yune Kyong Kim, Jung Hee Kim
    Workplace Health & Safety.2016; 64(8): 350.     CrossRef
  • Coffee Intake and Liver Enzyme Association in Korean Immigrants and Japanese: A Comprehensive Cross-Sectional Study
    Soo Ki Kim, Myung-Hee Shin, Kayo Sugimoto, Soo Ryang Kim, Susumu Imoto, Ke Ih Kim, Miyuki Taniguchi, Hyun-Kyung Oh, Yoshihiko Yano, Yoshitake Hayashi, Masatoshi Kudo
    Digestive Diseases.2016; 34(6): 665.     CrossRef
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