Journal of Preventive Medicine and Public Health

Original Article

Abdominal Obesity in Relation to the Incidence of Type 2 Diabetes Mellitus and Impaired Fasting Glucose among some Korean Adults: A Retrospective Cohort Study.: Seung Ho Ryu, Sung Ho Beck, Yoo Soo Chang, Dong Il Kim, Byung Seong Suh, Woon Sool Kim, Ki Chul Sung; J Prev Med Public Health. 2004;37(4):359-365. Published online November 30, 2004

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Abstract PDF: OBJECTIVES
This study was performed to determine whether an increase in abdominal obesity is an independent risk factor for impaired fasting glucose and type 2 DM. METHODS: Among 24, 212 adults over 30 years who undertook comprehensive medical screening examinations from Jan to Dec 1999, in a university hospital in Seoul, a total of 11, 183 subjects were selected who had no DM at baseline and who were followed up more than once by Dec 2002. The average follow up period was 2.4 (+/-0.5) years. DM was defined as having a fasting glucose level > or = 126mg/dl, and impaired fasting glucose as showing a fasting glucose level between 110 and 125 mg/dl. Body weight, height and waist circumference (WC) were simultaneously measured with blood sampling. The relative risks (RRs) for DM and impaired fasting glucose by WC were calculated using Cox proportional hazard model. Ageadjusted rates were estimated by direct standardization using a reference population of 2000 from 30 to 80 years. RESULTS: The average age of the subjects was 41.7 (+/- 7.0) years; males 41.2 (+/-6.5) and females 45.6 (+/-9.2). RRs for type 2 DM by WC with the reference group of WC < 80cm were as follows: 2.66 (95%, CI 0.55~12.8) for WC of 80~89cm in men, 5.92 (95%, CI 1.08~32.3) for WC > or = 90 cm in men, and 2.64 (95%, CI 0.23~29.8) for WC of 80~89cm in females. RRs for impaired fasting glucose by WC were 3.03 (95%, CI 2.18~4.22) for WC 80~89cm in men, 6.10 (95%, CI 4.25~8.75) for WC > or = 90cm in men, and 1.56 (95%, CI 0.43~5.67) for WC 80~89cm in women, and 8.08 (95%, CI 2.22~29.4) for WC > or = 90cm in females. These results remained significant after adjustment for age, BMI and fasting glucose concentrations at baseline in both sexes. Annual increment of more than 1 cm in WC was associated with the development of DM and impaired fasting glucose independently of age, sex, BMI, or presence of abdominal obesity. CONCLUSION: In Korean adults, abdominal obesity increased the risk for the development of type 2 diabetes and impaired fasting glucose. This result supports many other prospective studies suggesting abdominal obesity as a risk factor for type 2 diabetes.; Summary

English Abstracts

Associated Factors of Impaired Fasting Glucose in Some Korean Rural Adults.: Hye Eun Yun, Mi Ah Han, Ki Soon Kim, Jong Park, Myeng Guen Kang, So Yeon Ryu; J Prev Med Public Health. 2010;43(4):309-318.; DOI: https://doi.org/10.3961/jpmph.2010.43.4.309

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OBJECTIVES
This study was performed to investigate the prevalence of impaired fasting glucose (IFG) and its related characteristics among healthy adults in some Korean rural areas. METHODS: We conducted a cross-sectional study using the data from 1352 adults who were over the age 40 and under the age 70 and who were free of diabetes mellitus (DM), cardiovascular diseases and other diseases and who participated in a survey conducted as part of the Korean Rural Genomic Cohort Study. IFG was defined as a serum fasting glucose level between 100 and 125 mg/dL. RESULTS: The prevalence of IFG was 20.4% in men, 15.5% in women and 12.7% overall. Multivariate logistic regression analysis demonstrated that the independent risk factors for IFG were male gender, having a family history of DM, the quartiles of gamma glutamyltransferase and high sensitive C-reactive protein and the waist circumference. The homeostatis model assessment for insulin resistance was very strongly associated with IFG. The prevalence of metabolic syndrome (MS) and MS components was higher in the subjects with IFG then in those with normal fasting glucose (NFG). CONCLUSIONS: The result of study could supply evidence to find the high risk population and to determine a strategy for treating IFG. Further research is needed to explain the causal relationship and mechanisms of IFG.

Summary

Citations

Citations to this article as recorded by

Classification of Type 2 Diabetes Incidence Risk and the Health Behavior of the 30–50-Year-Old Korean Adults: Latent Class Analysis
Roma Seol, Jin-Ho Chun
International Journal of Environmental Research and Public Health.2022; 19(24): 16600. CrossRef

Serum Gamma-glutamyltransferase Levels and the Risks of Impaired Fasting Glucose in Healthy Men: A 2-year Follow-up.: Joo Youn Shin, Jong Han Lim, Dai Ha Koh, Keun Sang Kwon, Yong Kyu Kim, Hwan Chul Kim, Yeui Cheol Lee, Ju Hyoung Lee, Moon Suk Nam, Sung Bin Hong, Shin Goo Park; J Prev Med Public Health. 2006;39(4):353-358.

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Abstract PDF: OBJECTIVES
An increase in the serum gammaglutamyltransferase (GGT) concentration has been regarded as a marker of alcohol drinking or liver disease. Some reports, however, have suggested that the serum GGT may be a sensitive and early biomarker for the development of prediabetes and diabetes. In this study we investigated whether serum GGT is a reliable predictor of the incident impaired fasting glucose (IFG), including diabetes. METHODS: We performed a prospective study for two years (2002-2004). We analyzed the periodic health examination data from a total of 4,711 men. The examinations were done in the years 2002 and 2004. The analyzed data included a self-questionnaire, a physical examination and the laboratory results. Both IFG and diabetes were defined as a serum fasting glucose concentration of more than 100 mg/dL and 126 mg/dL, respectively. RESULTS: A total of 738 cases (15.7%) of incident IFG and 13 cases (0.3%) of diabetes occurred. The mean serum GGT concentrations were quite different between the normal (38.0 IU) and incident IFG groups (50.3 IU), and the incident diabetes group (66.0 IU) (p <0.001). After multivariable adjustment, the relative risks for incident IFG or diabetes across the baseline GGT categories (<10th, 10th-20th, 30th-40th, 50th-60th, 70th-80th and >90th percentile) were 1.0, 1.172 (0.769-1.785), 1.107 (0.725- 1.689), 1.444 (0.934-2.232), 2.061 (1.401-3.031) and 2.545 (1.784-3.631) (p-value for trend: <0.001). The risks significantly increased with increasing levels of GGT for 2 years; when comparing the increased groups (<10%, 10- 20%, >20%) versus the decreased over 20% group of GGT, the risks for IFG or diabetes were 1.334 (1.002-1.776), 1.613 (1.183-2.199) and 1.399 (1.092-1.794). CONCLUSIONS: Our findings suggest that serum GGT concentrations within its normal range may be an early predictor of the development of IFG and diabetes. As serum GGT is a relatively inexpensive test and a reliable marker, it might have important implications in public health promotion.; Summary

What will be the Proper Criteria for Impaired Fasting Glucose for Korean Men?: Based on Medical Screening Data from a General Hospital.: Seungho Ryu, Yoo Soo Chang, Dong Il Kim, Byung Seong Suh, Woon Sool Kim; J Prev Med Public Health. 2005;38(2):203-207.

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Abstract PDF: OBJECTIVES
Recently, the American Diabetes Association (ADA) redefined the criteria of prediabetes, which has lowered the diagnostic level of fasting plasma glucose (FPG) from 110 to 125 mg/dl, down to levels between 100 to 125mg/dl. The purpose of this study was to determine the predictive cutoff level of FPG as a risk for the development of diabetes mellitus in Korean men. METHODS: A retrospective cohort study was conducted on 11, 423 (64.5%) out of 17, 696 males < or =30 years of age, and who met the FPG of < or =125 mg/dl and hemoglobin A1c of < or = 6.4% criteria, without a history of diabetes, and who were enrolled at the screening center of a certain university hospital between January and December 1999. The subjects were followed from January 1999 to December 2002 (mean follow-up duration; 2.3 (+/-0.7) years). They were classified as normal (FPG < 100mg/dl), high glucose (FPG > or =100mg/dl and < 110mg/dl) and impaired fasting glucose (FPG > or =110mg/dl and < or =125mg/dl) on the basis of their fasting plasma glucose level measured in 1999. We compared the incidence of diabetes between the 3 groups by performing Cox proportional hazards model and used receiver operating characteristic analyses of the FPG level, in order to estimate the optimal cut-off values as predictors of incident diabetes. RESULTS: At the baseline, most of the study subjects were in age in their 30s to 40s (mean age, 41.8 (+/-7.1) year). The incidence of diabetes mellitus in this study was 1.19 per 1, 000 person-years (95% CI=0.68-1.79), which was much lower than the results of a community-based study that was 5.01 per 1, 000 person-years. The relative risks of incident diabetes in the high glucose and impaired fasting glucose groups, compared with the normal glucose group, were 10.3 (95% CI=2.58-41.2) and 95.2 (95% CI= 29.3-309.1), respectively. After adjustment for age, body mass index, and log triglyceride, a FPG greater than 100mg/dl remained significant predictors of incident diabetes. Using the receiver operating characteristic (ROC) curve, the optimal cutoff level of FPG as a predictor of incident diabetes was 97.5 mg/dl, with a sensitivity and a specificity of 81.0% and 86.0%, respectively. CONCLUSION: These results suggest that lowering the criteria of impaired fasting glucose is needed in Korean male adults. Future studies on community-based populations, including women, will be required to determine the optimal cutoff level of FPG as a predictor of incident diabetes.; Summary

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