PURPOSE: Recent studies have revealed close relationships between hepatic injury, metabolic pathways, and gut microbiota. The microorganisms in the intestine also cause irritable bowel syndrome (IBS). The aim of this study was to examine whether IBS was associated with elevated hepatic enzyme [alanine aminotransferase (ALT) and aspartate aminotransferase (AST)], gamma-glutamyl transferase (gamma-GT) levels, and metabolic syndrome (MS). MATERIALS AND METHODS: This was a retrospective, cross-sectional, case-control study. The case and control groups comprised subjects who visited our health promotion center for general check-ups from June 2010 to December 2010. Of the 1127 initially screened subjects, 83 had IBS according to the Rome III criteria. The control group consisted of 260 age- and sex-matched subjects without IBS who visited our health promotion center during the same period. RESULTS: Compared to control subjects, patients with IBS showed significantly higher values of anthropometric parameters (body mass index, waist circumference), liver enzymes, gamma-GT, and lipid levels. The prevalences of elevated ALT (16.9% vs. 7.7%; p=0.015) and gamma-GT (24.1% vs. 11.5%; p=0.037) levels were significantly higher in patients with IBS than in control subjects. A statistically significant difference was observed in the prevalence of MS between controls and IBS patients (12.7% vs. 32.5%; p<0.001). The relationships between elevated ALT levels, MS, and IBS remained statistically significant after controlling for potential confounding factors. CONCLUSION: On the basis of our study results, IBS may be an important condition in certain patients with elevated ALT levels and MS.
Adult ; Alanine Transaminase/analysis/*metabolism ; Aspartate Aminotransferases/analysis/*metabolism ; Body Mass Index ; Case-Control Studies ; Cross-Sectional Studies ; Female ; Humans ; Irritable Bowel Syndrome/diagnosis/*enzymology/epidemiology ; Liver/metabolism ; Male ; Metabolic Syndrome X/complications/diagnosis/*enzymology/epidemiology ; Middle Aged ; Obesity/epidemiology ; Prevalence ; Retrospective Studies ; Waist Circumference ; gamma-Glutamyltransferase/analysis/*metabolism

Dry eye syndrome (DES) is recognized as a public health concern. One of the pathophysiologies in the development of DES is inflammation, and metabolic syndrome (MetS), which is highly prevalent in the general population, is a well-known chronic and systemic inflammatory condition. Despite the increasing interest regarding a relationship between DES and MetS, information is lacking on the association between DES and MetS and its individual components. We investigated the association between DES symptoms and MetS and its components among adults aged ≥ 19 years using population-based data from the Korea National Health and Nutrition Examination Survey V. A sample group of 15,294 adults (42.67% men and 57.33% women) completed household interviews in which they provided blood (for high-density lipoprotein cholesterol, triglyceride, and glucose) and anthropometric measurements (including waist circumference, weight, and height) to define MetS. We also collected information regarding sociodemographic and behavioral risk factors. The survey results showed that 11.50% of men and 22.35% of women experienced DES and 5.30% of patients had both DES and diagnosis of MetS, including 204 men and 606 women. Thus, no significant difference was observed between DES and the diagnosis of MetS according to sex (P = 0.4008 in men; P = 0.0804 in women); however, a significant association was observed between DES and hypertriglyceridemia in women (OR, 1.13; 95% CI, 1.01-1.29). Therefore, hypertriglyceridemia might be an important factor in the association between DES and MetS. Further longitudinal research is needed to evaluate this relationship.
Adult ; Aged ; Blood Glucose/analysis ; Body Height ; Body Weight ; Cholesterol, HDL/blood ; Cross-Sectional Studies ; Dry Eye Syndromes/complications/*diagnosis/epidemiology ; Female ; Humans ; Hypertriglyceridemia/complications/diagnosis ; Interviews as Topic ; Male ; Metabolic Syndrome X/complications/*diagnosis/epidemiology ; Middle Aged ; Nutrition Surveys ; Prevalence ; Republic of Korea/epidemiology ; Risk Factors ; Sex Factors ; Triglycerides/blood ; Waist Circumference ; Young Adult

BACKGROUND/AIMS: This study evaluated the relationship between thyroid nodules and metabolic syndrome (MS) and its components in apparently healthy Koreans. METHODS: We reviewed the records of 3,298 subjects with no noticeable symptoms who underwent thyroid ultrasound imaging as part of a routine check-up between July 2009 and June 2010; of these, 1,308 were excluded based upon predefined criteria. Among the remaining 1,990 patients, we examined the association between MS and its components and the incidence of thyroid nodules. RESULTS: Of the 1,990 subjects included in this study, 38.4% (n = 764) had thyroid nodules and 12.7% (n = 253) had MS. Female sex, older age, higher body mass index, larger waist circumference, higher glycated hemoglobin level, lower thyroid stimulating hormone level, and presence of MS were all closely related with the presence of thyroid nodules (all p < 0.05). Furthermore, the relevant number of MS components showed a positive linear correlation with the occurrence of thyroid nodules (p < 0.001). Evidence of MS alone was not independently associated with thyroid nodules after adjusting for sex and age in a multivariate binary logistic regression analysis; however, glycated hemoglobin for females and waist circumference for males, as well as both age and thyroid stimulating hormone for all patients, were identified as independent predictors for the existence of thyroid nodules (all p < 0.05). CONCLUSIONS: This study suggests a positive relationship between the components of MS and thyroid nodules in an ostensibly healthy Korean population. Our data support the idea that the recent increase in thyroid nodules is partly due to increases in both MS and obesity.
Adult ; Biomarkers/blood ; Body Mass Index ; Chi-Square Distribution ; Cross-Sectional Studies ; Diabetes Mellitus/diagnosis/epidemiology ; Female ; Hemoglobin A, Glycosylated/analysis ; Humans ; Incidence ; Linear Models ; Logistic Models ; Male ; Metabolic Syndrome X/blood/diagnosis/*epidemiology ; Middle Aged ; Multivariate Analysis ; Obesity/diagnosis/epidemiology ; Odds Ratio ; Republic of Korea/epidemiology ; Retrospective Studies ; Risk Factors ; Thyroid Nodule/blood/diagnostic imaging/*epidemiology ; Thyrotropin/blood ; Waist Circumference

BACKGROUND/AIMS: The aim was to determine which of three sets of metabolic syndrome (MetS) criteria (International Diabetes Federation [IDF], National Cholesterol Education Program Adult Treatment Panel III [ATP III], and European Group for the Study of Insulin Resistance [EGIR]) best predicts the coronary artery calcification (CAC) score in a cross-sectional study. This has not been evaluated in previous studies. METHODS: A total of 24,060 subjects were screened for CAC by multi-detector computed tomography. The presence of CAC was defined as a CAC score > 0. The odds ratio for the presence of CAC was analyzed for three different sets of MetS criteria and according to number of MetS components. RESULTS: CAC was observed in 12.6% (3,037) of the subjects. Patients with MetS, as defined by the IDF, ATP III, and EGIR criteria, had a CAC rate of 23.0%, 25.1%, and 29.5%, respectively (p < 0.001). Comparisons of C statistics for multivariate regression models revealed no significant difference among the three sets of criteria. After adjustment for risk factors, the ATP III criteria produced a slightly higher odds ratio for CAC compared with the other criteria, but this difference was not significant. The risk factor-adjusted odds ratio for the presence of CAC increased from 1 to 1.679 as the number of MetS components defined by ATP III increased from 0 to > or = 3 (p for trend < 0.001). CONCLUSIONS: The presence of MetS was associated with the presence of CAC. There was no significant difference among the three sets of MetS criteria in terms of the ability to predict CAC. An increase in the number of MetS components was associated with an increased odds of CAC.
Adult ; Asymptomatic Diseases ; Biological Markers/blood ; Calcium/*analysis ; Coronary Angiography/methods ; Coronary Artery Disease/blood/*epidemiology/radiography ; Coronary Vessels/*chemistry/radiography ; Cross-Sectional Studies ; Female ; Humans ; Male ; Metabolic Syndrome X/blood/diagnosis/*epidemiology ; Middle Aged ; Multidetector Computed Tomography ; Multivariate Analysis ; Odds Ratio ; Predictive Value of Tests ; Prevalence ; Republic of Korea/epidemiology ; Risk Assessment ; Risk Factors ; Vascular Calcification/blood/*epidemiology/metabolism/radiography

This randomized controlled trial study aimed to investigate the effects of a lifestyle intervention on metabolic syndrome (MetS) among middle-aged Koreans. A total of 243 middle-aged Koreans with MetS were randomly assigned to either of 2 types of lifestyle intervention for MetS and followed for 12 months. Health examinations and interventions were implemented at 16 regional branch facilities of a Korean medical institution from 2010, following the NCEP-ATP III criteria and recommendations. Lifestyle intervention (LI) group (n = 137) participated in a 12-week multi-component intervention including individual counseling, group sessions, and self-help materials. Basic usual intervention (BI) group (n = 106) was provided with one-page health information sheet on MetS and MetS management at baseline. Prevalence of MetS and each of MetS components, except for low HDL-cholesterol, in both groups were significantly reduced and maintained after the intervention. Notably, prevalence of hypertension and abdominal obesity continued to improve during the follow-up period. Between-group differences in results were not found. Both interventions were effective when they were accompanied with repeated check-ups and notification of MetS status. It is recommended to design clear guidelines for the notification of MetS after MetS screening and to encourage checking MetS status periodically for effective MetS management (KCT 0000446).
Adult ; Combined Modality Therapy ; Directive Counseling/*methods ; Female ; Humans ; Male ; Mass Screening/*methods ; Metabolic Syndrome X/*diagnosis/epidemiology/*therapy ; Middle Aged ; Patient Education as Topic/methods ; *Risk Reduction Behavior ; *Self-Help Groups ; Treatment Outcome

BACKGROUND/AIMS: An association between serum uric acid and cancer risk has been noted over the past few decades. There is ongoing debate about whether hyperuricemia represents an independent risk factor for colorectal neoplasm. We investigated the association between serum uric acid and prevalence of colorectal adenoma considering numerous confounding factors. METHODS: A cross-sectional study was performed with individuals who underwent a routine health check-up examination, including a screening colonoscopy and blood chemistry. The association between serum uric acid and prevalence of colorectal adenoma was estimated from the results of a logistic regression analysis. RESULTS: Of the 1,066 participants, 402 had colorectal adenoma (37.7%). In univariate models, the prevalence of colorectal adenoma was higher in participants in the fourth quartile uric acid level, compared to those in the first quartile uric acid level (OR, 1.67; 95% CI, 1.17-2.42; p=0.004). However, no significant association was detected between serum uric acid and prevalence of colorectal adenoma in multiple logistic regression analysis. A number of metabolic syndrome components exhibited a strong association with the prevalence of colorectal adenoma in the multivariate model (OR, 3.46 for highest vs. lowest; 95% CI, 1.30-9.20; p=0.021). Moreover, serum uric acid was strongly associated with metabolic syndrome-associated variables, including waist circumference, fasting blood glucose, systolic blood pressure, diastolic blood pressure, triglyceride, and high-density lipoprotein. CONCLUSIONS: Uric acid is not an independent risk factor for colorectal adenoma but is a risk indicator for metabolic syndrome-related colorectal adenoma.
Adenoma/*diagnosis/epidemiology/etiology ; Adult ; Asian Continental Ancestry Group ; Blood Glucose/analysis ; Blood Pressure ; Colonoscopy ; Colorectal Neoplasms/*diagnosis/epidemiology/etiology ; Cross-Sectional Studies ; Female ; Humans ; Logistic Models ; Male ; Metabolic Syndrome X/*diagnosis ; Middle Aged ; Odds Ratio ; Prevalence ; Republic of Korea ; Risk Factors ; Triglycerides/blood ; Uric Acid/*blood/urine ; Waist Circumference

This study was done to evaluate the efficacy of health check-ups in children in detecting metabolic syndrome and non-alcoholic fatty liver disease (NAFLD) by comparing the pediatric health promotion center with the pediatric obesity clinic. Children who visited a pediatric health promotion center (n=218) or a pediatric obesity clinic (n=178) were included. Anthropometric data, blood pressure, laboratory tests, and abdominal ultrasonography were evaluated. Two different criteria were applied to diagnose metabolic syndrome. The prevalence of metabolic syndrome in the 2 units was 3.2%-3.7% in a pediatric health promotion center and 23%-33.2% in a pediatric obesity clinic. Significant differences were observed in the prevalence of each component of metabolic syndrome between the 2 units including abdominal adiposity, blood pressure, serum triglycerides, and fasting blood glucose (P<0.05). The prevalence of NAFLD was 8.7% and 71.9% in the 2 units according to liver enzymes and 5.9% and 61.8% according to ultrasonography (P<0.05). The prevalence of metabolic syndrome and NAFLD was higher among patients visiting the obesity clinic targeting obese children than that among patients visiting the health promotion center offering routine check-ups. An obesity-oriented approach is required to prevent obesity-related health problems in children.
Adolescent ; Causality ; Child ; Child, Preschool ; Comorbidity ; Female ; Health Promotion/*utilization ; Humans ; Male ; Metabolic Syndrome X/*diagnosis/epidemiology ; Non-alcoholic Fatty Liver Disease/*diagnosis/epidemiology ; Obesity/*diagnosis/epidemiology ; Physical Examination/*statistics & numerical data ; Prevalence ; Reproducibility of Results ; Republic of Korea/epidemiology ; Risk Factors ; Sensitivity and Specificity ; Young Adult

BACKGROUND/AIMS: The existence of an association between thyrotropin (thyroid stimulating hormone, TSH) levels and metabolic derangement in euthyroid subjects is controversial. We examined the association between high normal TSH levels and metabolic syndrome in healthy young women. METHODS: The study recruited 2,760 young female volunteers (age, 18 to 39 years) with TSH levels in the normal range (0.3 to 4.5 mU/L). We defined metabolic syndrome using the 2007 International Diabetes Federation criteria. Using a TSH level of 2.5 mU/L as an upper reference limit, as recommended by the National Academy of Clinical Biochemistry, we divided the subjects into high-(n = 453) and low-TSH groups (n = 2,307). RESULTS: The prevalence of metabolic syndrome was significantly higher in the high-TSH group than in the low-TSH group (7.5% vs. 4.8%, p = 0.016). Central obesity (22.3% vs. 17.3%, p = 0.012) and hypertriglyceridemia (8.0% vs. 4.2%, p = 0.0007) were significantly more frequent in the high-TSH group than in the low-TSH group. Waist circumference, systolic and diastolic blood pressure, and triglycerides were significantly associated with the TSH level after adjusting for age and body mass index (BMI). Subjects in the high-TSH group had a 2-fold greater risk of metabolic syndrome than subjects in the low-TSH group after adjusting for age and BMI (odds ratio, 1.9; 95% confidence interval, 1.1 to 3.2). CONCLUSIONS: Healthy young women with TSH levels > 2.5 mU/L should be assessed for the presence of metabolic syndrome, even if their TSH levels are in the normal range.
Adolescent ; Adult ; Age Factors ; Biological Markers/blood ; Female ; Humans ; Hypertension/blood/epidemiology ; Hypertriglyceridemia/blood/epidemiology ; Linear Models ; Metabolic Syndrome X/*blood/diagnosis/epidemiology ; Obesity, Abdominal/blood/epidemiology ; Odds Ratio ; Prevalence ; Republic of Korea ; Risk Factors ; Sex Factors ; Thyrotropin/*blood ; Up-Regulation ; Young Adult

BACKGROUND/AIMS: To compare the frequency of metabolic syndrome (MetS) and magnitude of insulin resistance, measured by the homeostatic model assessment of insulin resistance (HOMA-IR), between South Korean women with rheumatoid arthritis (RA) and healthy subjects, and to evaluate risk factors for MetS and increased HOMA-IR in patients with RA. METHODS: In a cross-sectional setting, 84 female patients with RA and 109 age-matched healthy female subjects were consecutively recruited at a university-affiliated rheumatology center in South Korea. MetS was defined according to the Third Report of the National Cholesterol Education Program's Adult Treatment Panel (NCEP-ATP III) 2004 criteria. RESULTS: The frequency of MetS did not differ significantly between patients with RA (19%) and healthy subjects (15.6%, p = 0.566), although patients with RA had a higher HOMA-IR compared with healthy subjects (p < 0.001). Patients with RA met the NCEP-ATP III 2004 criteria for high blood pressure more often than healthy subjects (44% vs. 19.3%, p < 0.001), and low high density lipoprotein cholesterol was more prevalent in healthy subjects (33%) than in patients with RA (14.3%, p = 0.004). Although no obvious risk factors for the presence of MetS were identified in patients with RA, higher serum C-reactive protein and disease activity score assessed using the 28-joint count for swelling and tenderness-erythrocyte sedimentation rate significantly contributed to a higher HOMA-IR. CONCLUSIONS: Despite their increased insulin resistance, South Korean women with RA did not have a significantly higher frequency of MetS compared with that in healthy subjects.
Adult ; Aged ; Arthritis, Rheumatoid/diagnosis/*epidemiology ; Biological Markers/blood ; Case-Control Studies ; Chi-Square Distribution ; Cross-Sectional Studies ; Female ; Humans ; Insulin Resistance ; Linear Models ; Logistic Models ; Metabolic Syndrome X/blood/diagnosis/*epidemiology ; Middle Aged ; Multivariate Analysis ; Odds Ratio ; Prevalence ; Republic of Korea/epidemiology ; Risk Assessment ; Risk Factors ; Sex Factors ; Young Adult

Either chronic inflammation or metabolic syndrome (MetS) is associated with renal impairment. This cross-sectional study was designed to investigate the relationship between elevated white blood cell (WBC) counts and chronic kidney disease (CKD) stage 3 or more according to the presence of MetS in adult Koreans. In total, 5,291 subjects (> or = 20 yr-old) participating in the 2005 Korean National Health and Nutrition Examination were included. CKD stage 3 or more was defined as having an estimated glomerular filtration rate below 60 mL/min/1.73 m2, as calculated using the formula from the Modification of Diet in Renal Disease study. The odds ratio (95% confidence interval) for CKD stage 3 or more in the highest WBC quartile (> or = 7,200 cells/microL) was 1.70 (1.17-2.39) after adjusting for MetS and other covariates, compared with the lowest WBC quartile (< 5,100 cells/microL). In subjects with MetS, the prevalence risk for CKD stage 3 or more in the highest WBC quartile was 2.25 (1.28-3.95) even after fully adjusting for confounding variables. In contrast, this positive association between WBC quartile and CKD stage 3 or more disappeared in subjects without MetS. Low-grade inflammation is significantly associated with CKD stage 3 or more in subjects with MetS but not in those without MetS.
Adult ; Cross-Sectional Studies ; Female ; Glomerular Filtration Rate ; Humans ; Inflammation/complications/*diagnosis ; Kidney Failure, Chronic/*epidemiology/etiology ; Leukocyte Count ; Male ; Metabolic Syndrome X/complications/*diagnosis ; Middle Aged ; Nutrition Surveys ; Odds Ratio ; Prevalence ; Republic of Korea/epidemiology ; Risk Factors ; Severity of Illness Index