Diabetes & Metabolism Journal

Original Articles

Long Menstrual Cycle Is Associated with Type 2 Diabetes Mellitus in Korean Women: Unjin Shim, Jee-Young Oh, Hye Jin Lee, Young Sun Hong, Yeon-Ah Sung; Diabetes Metab J. 2011;35(4):384-389. Published online August 31, 2011; DOI: https://doi.org/10.4093/dmj.2011.35.4.384

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Background

Long menstrual cycle is a risk factor for developing type 2 diabetes and cardiovascular disease in women. We aimed to evaluate the association between existing type 2 diabetes and oligomenorrhea before diagnosis of diabetes, and to observe the differences in this association among obese and non-obese Korean women.

Methods

Patients with type 2 diabetes (n=118) and without any clinical evidence of abnormal glucose regulation (n=258) who attended the outpatient clinic of a university hospital and were over age 30. Patients self-reporting a menstrual cycle over 40 days during their 20s were defined as oligomenorrhea before diagnosis of diabetes. Obesity was defined as having a body mass index (BMI) over 25 kg/m².

Results

The frequency of oligomenorrhea before diagnosis of diabetes was almost two-fold higher in women with type 2 diabetes than in the control group (16.1% vs. 8.5%, P=0.03). Oligomenorrhea was associated with type 2 diabetes after adjusting for age, BMI, systolic blood pressure, triglycerides, and high density lipoprotein cholesterol (odds ratio, 3.89; 95% confidence interval, 1.37 to 11.04). Among women with oligomenorrhea before diagnosis of diabetes, the frequency of type 2 diabetes was significantly higher in obese subjects than in their non-obese counterparts (90.9% vs. 30.0%, P=0.03).

Conclusion

Having a long menstrual cycle could be a risk factor for the development of type 2 diabetes, especially in obese women.

Citations

Citations to this article as recorded by

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Effects of the Glycemic Index of Dietary Carbohydrates on Insulin Requirement in Type 1 Diabetics on Continuous Subcutaneous Insulin Infusion.: Hye Jin Lee, Kwon Beom Kim, Kyung Ah Han, Kyung Wan Min, Eung Jin Kim, Ki Nam Kim; Korean Diabetes J. 2005;29(1):72-77. Published online January 1, 2005

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Abstract PDF: BACKGROUND
For ideal glycemic control, the pump user should have a meal planning approach that is as precise and flexible as the pump. Counting carbohydrate is simple and works, but is not a perfect system. Many researches indicate that not all carbohydrates create an equal response when it comes to their effect on blood glucose levels. For a better match between the glucose and insulin profiles, the glycemic index as along with counting carbohydrate might be considered. Therefore, we investigated whether the same amount of carbohydrates with different glycemic indices might require different insulin doses. METHODS: Five type 1 diabetics, using portable external pumps, whose basal rates were correctly set to maintain their blood glucose levels with in the target range under 12 hours fasting conditions, were enrolled. 50 grams of 4 carbohydrate containing foods, with different glycemic indices, were administered for 4 consecutive days to diabetic patients in an overnight fasting state. The test foods were rice, apple, milk and orange juice, for which the glycemic indices were 83, 54, 39 and 97, respectively. The insulin requirement for each food was determined so that the blood glucose level reached the target range four hours after eating. RESULTS: The glycemic indices for each food/rice ratio were significantly correlated with the insulin requirement (r = 0.586, P < 0.01). CONCLUSION: The meal-related insulin dose should be changed according to the glycemic index of the meal. Therefore both amount and source of carbohydrate determine the glucose and insulin responses of type 1 diabetic subjects

Insulin Requirement for Korean Type 1 Diabetics using Continuous Insulin Infusion with Portable External Pumps.: Hye Jin Lee, Kwon Beom Kim, Kyung Ah Han, Kyung Wan Min, Eung Jin Kim; Korean Diabetes J. 2004;28(6):538-546. Published online December 1, 2004

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Abstract PDF: BACKGROUND
Insulin pumps can be extremely effective in achieving a normal or near-normal blood glucose level in type 1 diabetic patients. For designing a pump program in western countries, it has been recommended that approximately half of the daily insulin dose should given in the basal infusion, and the other half make up the meal-related bolus dose. However, peoples' diet composition is quite different among the many countries. The carbohydrate composition in the Korean diet is higher (60~65%) than that in the western diet (45~50%). Carbohydrate is much more glycemic than protein or fat. Therefore, we evaluated the basal and meal-related insulin requirements for Korean type 1 diabetics by using continuous insulin infusion with portable external pumps. METHODS: Twenty three type 1 diabetic patients were admitted for continuous subcutaneous insulin infusion (CSII), and they were given a calculated diet (60% carbohydrate, 20% protein, and 20% fat). The Basal rates were set for the blood glucose levels to remain in the target range during 12 hour fasting state. The meal related bolus dose was set to remain in the target range at the premeal state. RESULTS: The daily total insulin requirement was 99.7 +/-0.3% of prepump insulin dose, and 0.57 +/-0.21 unit per kilogram of body weight. The basal and mealrelated insulin dose among the daily total insulin requirements were 33.7 +/-8.6 and 66.3 +/-8.6%, respectively. The daily total, basal and meal-related insulin requirements were not significantly related with body weight, but the glucose disposal rate per 1unit of insulin was significantly related with body weight (r=-0.424, P <0.05). CONCLUSION: Although the daily total insulin requirement per kilogram of body weight in Korean type 1 diabetics was similar to that in western diabetics, the basal insulin requirements were less and the meal-related insulin requirements were more than that in western diabetics.

Insulin Resistance in Normal Weight Women with Polycystic Ovary Syndrome.: Eun Kyung Byun, Hye Jin Lee, Jee Young Oh, Young Sun Hong, Hye Won Chung, Yeon Ah Sung; Korean Diabetes J. 2004;28(4):315-323. Published online August 1, 2004

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Abstract PDF: BACKGROUND
Insulin resistance is considered a regular component of polycystic ovary syndrome (PCOS). However, several studies have failed to confirm insulin resistance in non-obese women with PCOS. The aim of the study was to identify whether insulin resistance is present in normal weight women with PCOS and the factors associated with insulin sensitivity. METHODS: Twenty-two normal weight (body mass index, BMI < 25 kg/m2) women with PCOS, and 16 age and BMI comparable control women with regular menstrual cycles were examined during their early follicular phase. The levels of serum hormones and lipids were measured. The visceral fat area was assessed by computed tomography at umbilical level. The standard 75g oral glucose tolerance test was performed to determine the glucose tolerance status. The insulin sensitivity was measured using the euglycemic hyperinsulinemic clamp technique (target glucose 90 mg/dL, insulin~1 mu/kg/min). RESULTS: The levels of free testosterone (1.9+/-0.6 pg/mL vs. 0.8+/-0.3 pg/mL, p<0.001), androstenedione (14.5+/-3.7 nmol/L vs. 8.8+/-1.3 nmol/L, p<0.001), LH (10.7+/-4.5 IU/L vs 4.6+/-4.8 IU/L, p<0.001) and FSH (5.8+/-1.7 IU/L vs. 4.2+/-2.4 IU/L, p<0.05) of the women with PCOS were significantly higher than those of the control subjects. The fasting plasma glucose (4.92+/-0.31 mmol/L vs. 4.42+/-0.61 mmol/L, p<0.01) and post glucose load plasma insulin (233.2+/-119.5pmol/L vs. 109.0+/-46.4 pmol/L, p<001) levels of women with PCOS were significantly higher than those of the control subjects. The glucose disposal rate (M value) was significantly lower in women with PCOS compared to the controls (5.3+/-1.2 mg/kg min vs. 6.7+/-1.6 mg/kg min, p<0.05), even after adjusting for age and BMI. There was no significant correlation of the M value with the anthropometric and a metabolic indices, and a multiple regression analysis of the M value showed no significant variables. CONCLUSION: Our non-obese women with PCOS showed significant insulin resistance compared to their age and BMI comparable control subjects, and-their insulin resistance may be an intrinsic defect not associated with other features, such as hyperandrogenemia or body fat distribution patterns.

Association of High Intracellular Calcium Levels with Insulin Resistance in Women with Polycystic Ovary Syndrome.: Jee Young Oh, Hye Jin Lee, Young Sun Hong, Hye Won Chung, Yeon Ah Sung; Korean Diabetes J. 2004;28(2):101-110. Published online April 1, 2004

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Abstract PDF: BACKGROUND
Insulin resistance is an intrinsic defect of polycystic ovary syndrome (PCOS), and elevated levels of cytosolic free calcium in insulin target cells may cause insulin resistance. To our knowledge, the relationship between intracellular calcium and insulin resistance in PCOS has not been investigated. The purpose of this study was to determine whether the levels of intracelluar calcium are changed and if they have any association with insulin resistance in women with PCOS. METHODS: The intracellular calcium levels in the platelets and the insulin sensitivity were measured by fluorescent spectrophotometry and the euglycemic hyperinsulinemic clamp technique, respectively, in 16 women with PCOS and 6 normal cycling women. A 2h, 75 g oral glucose tolerance test was performed to determine the glucose tolerance. RESULTS: The insulin sensitivity measured by the glucose disposal rate(the M-value), was significantly lower in women with PCOS(4.6+/-1.5mg/kg/min vs. 7.0+/-1.3mg/kg/min, p<0.01), but the intracellular calcium levels were significantly higher in women with PCOS compared to the controls(122.7+/-36.7 vs 59.1+/-29.3mmol/L, p<0.01). When the women with PCOS were divided into the overweight or obese(n=9, BMI ?23kg/m2) and lean(n=7, BMI<23kg/m2) groups, both groups had significantly lower M values compared to the control subjects(3.9+/-1.3, 5.5+/-1.2 vs. 7.0+/-1.3mumg/kg/min, p<0.001), and these levels between the overweight/obese and lean PCOS groups showed a significant difference(p<0.001). The overweight/ obese and lean women with PCOS had significantly higher levels of intracellular calcium compared to the control subjects(131.3+/-39.6, 111.7+/-31.8 vs. 59.1+/-29.3nmol/L, p<0.01), but these levels did not differ significantly between the overweight/obese and lean women with PCOS. The intracellular calcium levels showed a significant positive correlation with age, and a negative correlation with the M value(r=-0.55, p<0.05). The BMI-adjusted partial correlation showed marginal significance between elevated levels of intracellular calcium and insulin sensitivity (r=-0.47, p=0.07). CONCLUSION: Women with PCOS showed both insulin resistance and increased levels of intracellular calcium compared to the control subjects. Increased levels of intracellular calcium were associated with insulin resistance in women with PCOS.

The Prevalence and Incidence of Diabetes in Mokdong, Seoul.: Jee Young Oh, Hye Jin Lee, Eun Soon Hong, Young Sun Hong, Yeon Ah Sung, Sun Hee Lee; Korean Diabetes J. 2003;27(1):73-83. Published online February 1, 2003

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Abstract PDF: BACKGROUND
Diabetes has recently become a major public health problem due to the socioeconomic changes in Korea. Epidemiological data for diabetes are needed to establish disease control and health improvement programs in the community. Considering the tendency for larger concentrations of the population in the urban areas of Korea, epidemiological studies in these areas are essential. This this was performed to determine the epidemiologic characteristics, prevalence, and incidence of diabetes in Korean urban communities. METHODS: The target cohort of this study was randomly selected from 20,222 residents living in the Mokdong apartment areas one, two, five and six, Yangcheon-Gu, Seoul. Of the 20,222 residents, 1,011 were residents, of which 766 (male 264, female 502) subjects participated and 372 subjects without diabetes at baseline examination followed up for 2 years. At the baseline and follow-up examination, all subjects underwent a 75g oral glucose tolerance test (OGTT) and anthropometric measurements (height, weight, waist to hip ratio, pulse rate, blood pressure, and subcutaneous skin fold thickness) were performed. RESULTS: There was an 8.5% prevalence of diabetes and 7.8% with impaired glucose regulation (IGR), including impaired glucose tolerance (IGT) and impaired fasting glucose (IFG). The age-adjusted prevalence of diabetes IGR were 8.4% and 7.1%, respectively. The prevalence of diabetes or IGR increased with increasing age. The prevalence of diabetes was associated with aging, family history of diabetes, and high levels of waist to hip ratio. The age-adjusted annual incidence rate of diabetes for subjects over 40 years of age at the baseline was 1.3%. The risk factors for the development of incident diabetes, from a multiple logistic regression analysis, were the waist to hip ratio and the 2-hour postload serum glucose concentrations. CONCLUSION: The prevalence of diabetes in the Mokdong apartment area was slightly higher than in Yonchon, Jungup, or Beijing. The annual incidence of diabetes was lower than that found in the studies in Yonchon or in Pima Indian, but higher than those of Caucasians or American Hispanics.

Sex Hormone Binding Globulin, Body Fat Distribution and Insulin Resistance in Premenopausal Women.: Young Sook Lee, Hye Jin Lee, Jee Young Oh, Young Sun Hong, Yeon Ah Sung; Korean Diabetes J. 2003;27(1):63-72. Published online February 1, 2003

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Abstract PDF: BACKGROUND
Low levels of sex-hormone binding globulin (SHBG), an indirect index of androgenicity, have been reported to be associated with obesity, especially central obesity. In women, increased androgenicity is related to hyperinsulinemia, impaired glucose tolerance and the development of type 2 diabetes mellitus. Recent studies have suggested that the relationship between SHBG and insulin resistance was mediated by the change in total or visceral adiposity, and that ethnical differences in the relationship between sex hormone and body fat distribution might exist. METHODS: We examined the associations of SHBG to the body fat distribution and insulin resistance in Korean premenopausal women. The fasting serum level of SHBG was measured by RIA, and the insulin sensitivity by the minimal model derived sensitivity index (SI), using the insulin modified intravenous glucose tolerance test. The amount of body fat, and its distribution, were assessed by anthropometric measurement, bioelectric impedance analyses, and computed tomography at the level of the umbilicus. RESULTS: 1. SHBG was significantly inversely correlated with the body mass index (BMI), waist circumference, visceral fat area, and fasting insulin levels, and was significantly positively correlated to the SI. 2. SHBG was significantly lower in premenopausal women with an impaired glucose tolerance, compared to those with a normal glucose tolerance, and significantly lower in those with hypertension (systolic BP> or =140 mmHg or diastolic BP> or =90 mmHg), compared to those with normal blood pressure. SHBG was also significantly lower in persons with central obesity(waist circumference > or = 80 cm) compared to those without. 3. In a multiple linear regression analysis, the SI was significantly associated with SHBG, after adjustment for age, BMI, systolic blood pressure, triglycerides, HDL- cholesterol, and percentage body fat, but this association disappeared after additional adjustment for visceral fat area. 4. In a multiple linear regression analysis, the fasting plasma insulin, BMI and percentage body fat were significant independent factors associated with SHBG. CONCLUSION: Increased androgenicity as assessed by decreased serum SHBG concentrations, is strongly associated with an unfavorable body fat distribution, hypertension, glucose intolerance, hyperinsulinemia, and insulin resistance.

Pospartum Assessment of Insulin Secretion and Sensitivity in Women with Gestational Diabetes Mellitus (GDM).: Eun Soon Hong, Hye Jin Lee, Young Sun Hong, Eon Ah Sung, Yeon Jin Jang; Korean Diabetes J. 2002;26(5):319-327. Published online October 1, 2002

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Abstract PDF: BACKGROUND
Gestational diabetes mellitus (GDM) affects 2~4% of all pregnant women. Women with a history of GDM are at high risk of developing type 2 DM, in the future; with a cumulative incidence is 40~60%. Therefore, the assessment of insulin secretion and sensitivity in women with a history of GDM should help in the elucidation of some of the underlying defects of insulin secretion or action in the evolution of type 2 DM. This study was performed to evaluate the characteristics of insulin secretory capacity and sensitivity in women with gestational diabetes following child birth. METHODS: Oral glucose tolerance tests were carried out at 6~8 weeks postpartum in 22 women with a history of GDM, and 20 age and weight matched non- pregnant controls. Frequently sampled intravenous glucose tolerance test (FSIGT) were done at 10~14 weeks postpartm, and insulin secretion was measured as the acute insulin response to glucose (AIRg) and insulin sensitivity as minimal model derived sensitivity index (SI). AIRg*SI was used as an index for beta-cell function because AIRg can be modulated by SI. RESULTS: According to the results of OGTT, the subjects with a history of GDM were classified into 2 groups, one of normal glucose tolerance (postpartum-NGT) (n=11) and the other of an impaired glucose tolerance (postpartum-IGT)(n=11). There were no significant differences in WHR (waist to hip ratio), blood pressure, and serum lipid concentrations among the controls, postpartum-NGT and postpartum-IGT group. The fasting glucose level was significantly higher in the postpartum-IGT group compared to the postpartum-NGT and control groups (p<0.05). The fasting serum insulin level was significantly lower in the postpartum-NGT and -IGT groups than in the control group (p<0.05). The AIRg and AIRg*SI were significantly lower in the postpartum-NGT and -IGT groups compared to the control group (p<0.05), however the SI was lower in the postpartum-NGT and -IGT groups compared to the control group, but the difference did not reach statistical significance. The percentage of parental with history of type 2 diabetes was significantly greater in the postpartum-IGT group compared to the postpartum-NGT group (p<0.05). No significant predictive factors for subsequent IGT were found inform a logistic regression analysis. CONCLUSION: The insulin secretory capacity of women previously having suffered GDM was impaired, even though their glucose tolerance was restored to normal following child birth. Our results suggest that impaired insulin secretion may be a major path-ophysiological factor in the development of type 2 DM in women with a previous history of GDM.

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