Prevalence and characteristics of isolated nocturnal hypertension in the general population

Background/Aims@#Ascertaining the prevalence of isolated nocturnal hypertension (INHT) in the general population and identifying the characteristics of patients with INHT may be important to determine patients who should receive 24- hour ambulatory blood pressure (BP) measurements. This study aimed to evaluate the prevalence and characteristics of INHT in the general population. @*Methods@#Of 1,128 participants (aged 20 to 70 years), we analyzed 823 who had valid 24-hour ambulatory BP measurements and were not on antihypertensive drug treatment. @*Results@#The prevalence of INHT in the study was 22.8%. Individuals with INHT had a higher office, 24-hour, and daytime and nighttime ambulatory systolic and diastolic BPs compared to individuals with sustained day-night normotension. INHT was more prevalent in individuals with masked hypertension (MH) than in those with sustained hypertension (59.8% vs. 15.6%, p < 0.001). Among individuals with INHT, 92.6% had MH. Among individuals with office BP-based prehypertension, 34.5% had both INHT and MH. The prevalence of INHT was highest in individuals with office BP-based prehypertension. INHT was an independent determinant of MH after adjustment for age, sex, body mass index, diabetes, low-density-lipoprotein cholesterol, 24-hour systolic and diastolic BP, systolic and diastolic BP dipping, and systolic and diastolic BP non-dipping. @*Conclusions@#The present study showed that INHT is not uncommon and is a major determinant of MH. Our findings strongly suggest the use of 24-hour ambulatory BP measurement for individuals within the prehypertension range of office BP owing to the high prevalence of INHT and MH in this population.

Prevalence and characteristics of isolated nocturnal hypertension in the general population

Background/Aims@#Ascertaining the prevalence of isolated nocturnal hypertension (INHT) in the general population and identifying the characteristics of patients with INHT may be important to determine patients who should receive 24- hour ambulatory blood pressure (BP) measurements. This study aimed to evaluate the prevalence and characteristics of INHT in the general population. @*Methods@#Of 1,128 participants (aged 20 to 70 years), we analyzed 823 who had valid 24-hour ambulatory BP measurements and were not on antihypertensive drug treatment. @*Results@#The prevalence of INHT in the study was 22.8%. Individuals with INHT had a higher office, 24-hour, and daytime and nighttime ambulatory systolic and diastolic BPs compared to individuals with sustained day-night normotension. INHT was more prevalent in individuals with masked hypertension (MH) than in those with sustained hypertension (59.8% vs. 15.6%, p < 0.001). Among individuals with INHT, 92.6% had MH. Among individuals with office BP-based prehypertension, 34.5% had both INHT and MH. The prevalence of INHT was highest in individuals with office BP-based prehypertension. INHT was an independent determinant of MH after adjustment for age, sex, body mass index, diabetes, low-density-lipoprotein cholesterol, 24-hour systolic and diastolic BP, systolic and diastolic BP dipping, and systolic and diastolic BP non-dipping. @*Conclusions@#The present study showed that INHT is not uncommon and is a major determinant of MH. Our findings strongly suggest the use of 24-hour ambulatory BP measurement for individuals within the prehypertension range of office BP owing to the high prevalence of INHT and MH in this population.

A Case Report for Myopericarditis after BNT162b2 COVID-19 mRNA Vaccination in a Korean Young Male

Mass vaccination with the Pfizer-BioNTech coronavirus disease 2019 (COVID-19) vaccine (BNT162b2) in Korea has resulted in many reported adverse effects. These side effects are the object of much scrutiny in the medical community. We report the case of a 29-year-old male who was diagnosed with myopericarditis after his second dose of Pfizer-BioNTech COVID-19 vaccine. This patient is the second recognized case of Pfizer-BioNTech COVID-19 vaccine induced myopericarditis in Korea and the first to have recovered from it. He originally presented with chest discomfort and exertional chest pain. Lab tests revealed elevated cardiac marker levels and echocardiographic findings displayed minimal pericardial effusion, prompting diagnosis as myopericarditis. We decided on two weeks of outpatient treatment with non-steroidal anti-inflammatory drugs (NSAIDs) due to the patient's mild symptoms and his occupation in the military. When this proved insufficient, we shifted to combination therapy with low dose corticosteroids and NSAIDs. After two weeks of treatment, the patient's symptoms and pericardial effusion had improved, and he was recovered completely 37 days after the onset.

A Case Report for Myopericarditis after BNT162b2 COVID-19 mRNA Vaccination in a Korean Young Male

Mass vaccination with the Pfizer-BioNTech coronavirus disease 2019 (COVID-19) vaccine (BNT162b2) in Korea has resulted in many reported adverse effects. These side effects are the object of much scrutiny in the medical community. We report the case of a 29-year-old male who was diagnosed with myopericarditis after his second dose of Pfizer-BioNTech COVID-19 vaccine. This patient is the second recognized case of Pfizer-BioNTech COVID-19 vaccine induced myopericarditis in Korea and the first to have recovered from it. He originally presented with chest discomfort and exertional chest pain. Lab tests revealed elevated cardiac marker levels and echocardiographic findings displayed minimal pericardial effusion, prompting diagnosis as myopericarditis. We decided on two weeks of outpatient treatment with non-steroidal anti-inflammatory drugs (NSAIDs) due to the patient's mild symptoms and his occupation in the military. When this proved insufficient, we shifted to combination therapy with low dose corticosteroids and NSAIDs. After two weeks of treatment, the patient's symptoms and pericardial effusion had improved, and he was recovered completely 37 days after the onset.

Gender differences in the presentation of chest pain in obstructive coronary artery disease: results from the Korean Women’s Chest Pain Registry

Background/Aims@#Chest pain in patients with obstructive coronary artery disease (OCAD) is affected by several social factors. The gender-based differences in chest pain among Koreans have yet to be investigated. @*Methods@#The study consecutively enrolled 1,549 patients (male/female, 514/1,035; 61 ± 11 years old) with suspected angina. The predictive factors for OCAD based on gender were evaluated. @*Results@#Men experienced more squeezing type pain on the left side of chest, while women demonstrated more dull quality pain in the retrosternal and epigastric area. After adjustment for risk factors, pain in the retrosternal area (odds ratio [OR], 1.491; 95% confidence interval [CI], 1.178 to 1.887) and aggravation by exercise (OR, 2.235; 95% CI, 1.745 to 2.861) were positively associated with OCAD. In men, shorter duration (OR, 1.581; 95% CI, 1.086 to 2.303) and dyspnea (OR, 1.610; 95% CI, 1.040 to 2.490) increased the probability for OCAD, while left-sided chest pain suggested a low probability for OCAD (OR, 0.590; 95% CI, 0.388 to 0.897). In women, aggravation by emotional stress (OR, 0.348; 95% CI, 0.162 to 0.746) and dizziness (OR, 0.457; 95% CI, 0.246 to 0.849) decreased the probability for OCAD. @*Conclusions@#This is the first study to focus on gender differences in chest pain among Koreans with angina. Symptoms with high probability for OCAD were different between sexes. Our findings suggest that patient’s medical history in pretest assessment for OCAD should be individualized considering gender.

Medical Resource Consumption and Quality of Life in Peripheral Arterial Disease in Korea: PAD Outcomes (PADO) Research

BACKGROUND AND OBJECTIVES@#We aimed to investigate the history of medical resource consumption and quality of life (QoL) in peripheral arterial disease (PAD) patients in Korea.@*METHODS@#This was a prospective, multi-center (23 tertiary-hospitals, division of cardiology), non-interventional study. Adult patients (age ≥20 years) suffering from PAD for the last 12-month were enrolled in the study if they met with any of following; 1) ankle-brachial index (ABI) ≤0.9, 2) lower-extremity artery stenosis on computed tomography angiography ≥50%, or 3) peak-systolic-velocity-ratio (PSVR) on ultrasound ≥2.0. Medical chart review was used to assess patient characteristics/treatment patterns while the history of medical resource consumption and QoL data were collected using a patient survey. QoL was measured using EuroQoL-5-dimensions-3-level (EQ-5D-3L) score system, and the factors associated with QoL were analyzed using multiple linear regression analysis.@*RESULTS@#This study included 1,260 patients (age: 69.8 years, male: 77.0%). The most prevalent comorbidities were hypertension (74.8%), hyperlipidemia (51.0%) and diabetes-mellitus (50.2%). The 94.1% of the patients took pharmacotherapy including aspirin (76.2%), clopidogrel (53.3%), and cilostazol (33.6%). The 12.6% of the patients were receiving smoking cessation education/pharmacotherapy. A considerable number of patients (500 patients, 40.0%) had visit history to another hospital before diagnosis/treatment at the current hospital, with visits to orthopedic units (50.4%) being the most common. At the time, 29% (or higher) of the patients were already experiencing symptoms of critical limb ischemia. Baseline EQ-5D index and EQ VAS were 0.64±0.24 and 67.49±18.29. Factors significantly associated with QoL were pharmacotherapy (B=0.05053; p=0.044) compared to no pharmacotherapy, and Fontaine stage improvement/maintain stage I (B=0.04448; p < 0.001) compared to deterioration/maintain stage II–IV.@*CONCLUSIONS@#Increase in disease awareness for earlier diagnosis and provision of adequate pharmacotherapy is essential to reduce disease burden and improve QoL of Korean PAD patients.

Medical Resource Consumption and Quality of Life in Peripheral Arterial Disease in Korea: PAD Outcomes (PADO) Research

BACKGROUND AND OBJECTIVES: We aimed to investigate the history of medical resource consumption and quality of life (QoL) in peripheral arterial disease (PAD) patients in Korea. METHODS: This was a prospective, multi-center (23 tertiary-hospitals, division of cardiology), non-interventional study. Adult patients (age ≥20 years) suffering from PAD for the last 12-month were enrolled in the study if they met with any of following; 1) ankle-brachial index (ABI) ≤0.9, 2) lower-extremity artery stenosis on computed tomography angiography ≥50%, or 3) peak-systolic-velocity-ratio (PSVR) on ultrasound ≥2.0. Medical chart review was used to assess patient characteristics/treatment patterns while the history of medical resource consumption and QoL data were collected using a patient survey. QoL was measured using EuroQoL-5-dimensions-3-level (EQ-5D-3L) score system, and the factors associated with QoL were analyzed using multiple linear regression analysis. RESULTS: This study included 1,260 patients (age: 69.8 years, male: 77.0%). The most prevalent comorbidities were hypertension (74.8%), hyperlipidemia (51.0%) and diabetes-mellitus (50.2%). The 94.1% of the patients took pharmacotherapy including aspirin (76.2%), clopidogrel (53.3%), and cilostazol (33.6%). The 12.6% of the patients were receiving smoking cessation education/pharmacotherapy. A considerable number of patients (500 patients, 40.0%) had visit history to another hospital before diagnosis/treatment at the current hospital, with visits to orthopedic units (50.4%) being the most common. At the time, 29% (or higher) of the patients were already experiencing symptoms of critical limb ischemia. Baseline EQ-5D index and EQ VAS were 0.64±0.24 and 67.49±18.29. Factors significantly associated with QoL were pharmacotherapy (B=0.05053; p=0.044) compared to no pharmacotherapy, and Fontaine stage improvement/maintain stage I (B=0.04448; p < 0.001) compared to deterioration/maintain stage II–IV. CONCLUSIONS: Increase in disease awareness for earlier diagnosis and provision of adequate pharmacotherapy is essential to reduce disease burden and improve QoL of Korean PAD patients.

Pathological Significance of Tissue Trapped in Retrieved OptEase Vena Cava Filter at 18th Day after Installation in Patient with Deep Vein Thrombosis

The retrievable type of inferior vena cava filter has been widely used to prevent pulmonary thromboembolism in patients with deep vein thrombosis and contraindication of anticoagulation. Physicians make considerable efforts to remove the filter according to the manufacturer and US Food and Drug Administration safety advisory recommendation. However, forced filter retrieval might cause vascular injury within 3 weeks. Herein, we report pathologic and angiographic findings to suggest filter associated vascular injury during forced retrieval just within recommended period in a patient with deep vein thrombosis.

Aging Index using Photoplethysmography for a Healthcare Device: Comparison with Brachial-Ankle Pulse Wave Velocity / 대한의료정보학회지

OBJECTIVES: Recent studies have emphasized the potential information embedded in peripheral fingertip photoplethysmogram (PPG) signals for the assessment of arterial wall stiffening during aging. For the discrimination of arterial stiffness with age, the brachial-ankle pulse wave velocity (baPWV) has been widely used in clinical applications. The second derivative of the PPG (acceleration photoplethysmogram [APG]) has been reported to correlate with the presence of atherosclerotic disorders. In this study, we investigated the association among age, the baPWV, and the APG and found a new aging index reflecting arterial stiffness for a healthcare device. METHODS: The APG and the baPWV were simultaneously applied to assess the accuracy of the APG in measuring arterial stiffness in association with age. A preamplifier and motion artifact removal algorithm were newly developed to obtain a high quality PPG signal. In total, 168 subjects with a mean +/- SD age of 58.1 +/- 12.6 years were followed for two months to obtain a set of complete data using baPWV and APG analysis. RESULTS: The baPWV and the B ratio of the APG indices were correlated significantly with age (r = 0.6685, p < 0.0001 and r = -0.4025, p < 0.0001, respectively). A regression analysis revealed that the c and d peaks were independent of age (r = -0.3553, p < 0.0001 and r = -0.3191, p < 0.0001, respectively). CONCLUSIONS: We determined the B ratio, which represents an improved aging index and suggest that the APG may provide qualitatively similar information for arterial stiffness.

Efficacy of Veno-Venous Extracorporeal Membrane Oxygenation in Severe Acute Respiratory Failure

PURPOSE: The objective of this study was to evaluate our institutional experience with veno-venous (VV) extracorporeal membrane oxygenation (ECMO) in patients with severe acute respiratory failure (ARF). MATERIALS AND METHODS: From January 2007 to August 2013, 31 patients with severe ARF that was due to various causes and refractory to mechanical ventilation with conventional therapy were supported with VV ECMO. A partial pressure of arterial oxygen (PaO2)/inspired fraction of oxygen (FiO2) <100 mm Hg at an FiO2 of 1.0 or a pH <7.25 due to CO2 retention were set as criteria for VV ECMO. RESULTS: Overall, 68% of patients survived among those who had received VV ECMO with a mean PaO2/FiO2 of 56.8 mm Hg. Furthermore, in trauma patients, early use of ECMO had the best outcome with a 94% survival rate. CONCLUSION: VV ECMO is an excellent, life-saving treatment option in patients suffering from acute and life-threatening respiratory failure due to various causes, especially trauma, and early use of VV ECMO therapy improved outcomes in these patients.

The effect of high-dose vitamin D supplementation on insulin resistance and arterial stiffness in patients with type 2 diabetes

BACKGROUND/AIMS: Recent epidemiological studies revealed a striking inverse relationship between vitamin D levels, glucose intolerance/insulin resistance (IR), and cardiovascular disease. However, few interventional studies have evaluated the effect of vitamin D supplementation on cardiovascular risk, such as IR and arterial stiffness, in diabetes. We investigated the role of vitamin D supplementation on cardiovascular risk in type 2 diabetes patients, including metabolic parameters, IR, and arterial stiffness. METHODS: We enrolled patients who were taking antidiabetic medications or managed their diabetes using lifestyle changes. We excluded patients who were taking vitamin D or calcium supplements. We randomized participants into the vitamin D group (cholecalciferol 2,000 IU/day + calcium 200 mg/day, n = 40) or the placebo group (calcium 200 mg/day, n = 41). We compared their IR (homeostasis model of assessment [HOMA]-IR) and arterial stiffness (brachial-ankle pulse wave velocity and radial augmentation index) before and after 24 weeks of intervention. RESULTS: The baseline characteristics of the two groups were similar. A total of 62 participants (placebo, 30; vitamin D, 32) completed the study protocol. At the end of the study period, the 25-hydroxyvitamin D [25(OH)D] levels were significantly higher in the vitamin D group than in the placebo group (35.4 +/- 8.5 ng/mL vs. 18.4 +/- 7.3 ng/mL, p < 0.001). There was no difference in HOMA-IR or changes in arterial stiffness (placebo, 21, vitamin D, 24) between the groups. CONCLUSIONS: Our data suggest that high-dose vitamin D supplementation might be effective in terms of elevating 25(OH)D levels. However, we identified no beneficial effects on cardiovascular risk in type 2 diabetes, including IR and arterial stiffness.

Myopericarditis in a Korean Young Male With Systemic Lupus Erythematosus

Myocardial involvement with clinical symptoms is a rare manifestation of systemic lupus erythematosus (SLE), despite the relatively high prevalence of myocarditis at autopsies of SLE patients. In this review, we report the case of a 19-year-old male SLE patient who initially presented with myopericarditis and was successfully treated with high dose of glucocorticoids.

Concurrent Coronary Thromboembolism and Pulmonary Thromboembolism without Right-to-Left Shunt / 대한내과학회지

A 65-year-old woman was referred for management of chest pain and ST segment elevation on electrocardiography. Emergency coronary angiography revealed a well demarcated thrombus that near totally occluded the mid portion of the left anterior descending artery, with a Thrombolysis In Myocardial Infarction (TIMI) flow grade 1, and a fusiform aneurysm on the left main coronary artery. No significant stenosis was observed after aspiration of the thrombus; however, complete coronary reperfusion by urgent aspiration did not improve her dyspnea and tachypnea. Echocardiography revealed a D-shaped left ventricle; thus, we performed a chest computed tomography scan and diagnosed a pulmonary embolism. The patient's coagulation studies were normal. She was prescribed chronic anticoagulation, and we carried out transthoracic echocardiography using second harmonic imaging with agitated saline. Second harmonic imaging with the Valsalva maneuver revealed no right-to-left shunt. We report here a case of concurrent coronary embolism and pulmonary embolism without right-to-left shunt.

Predictors of In-Hospital Mortality and Left Ventricular Functional Recovery in Korean Patients with Stress-Induced Cardiomyopathy: Stress-Induced Cardiomyopathy Registry Data / 대한내과학회지

BACKGROUND/AIMS: The reported frequency of stress-induced cardiomyopathy (SCMP, Takotsubo cardiomyopathy) is increasing; however, there are no data regarding predictors of in-hospital mortality and the recovery of left ventricular (LV) systolic function in patients with SCMP. Therefore, in this study, we sought to identify clinical predictors of in-hospital mortality and of the recovery of LV dysfunction in Korean patients with SCMP. METHODS: From November 2004 to November 2010, 155 patients who fulfilled the clinical diagnostic criteria of the Mayo clinic for SCMP were enrolled retrospectively from eight medical centers in Korea. We checked in-hospital deaths and compared the LV ejection fraction (LVEF) and wall-motion score index (WMSI) upon enrollment for each patient with that after 1 week using echocardiograms. A total of 55 continuous variables and 52 nominal variables were analyzed to find variables associated with in-hospital mortality and the recovery of LV dysfunction. All significant variables were entered into a logistic regression analysis. RESULTS: The mean age of the patients was 64 +/- 15 years; 118 (76.1%) patients were female. The in-hospital mortality rate was 5.2% (n = 8). An elevated initial platelet count was identified as a predictor of in-hospital mortality (odds ratio [95% CI]: 0.99 [0.99-1.00]). There were no predictors of the recovery of LVEF. Predictors of the recovery of WMSI were an absence of arrhythmic events (odds ratio [95% CI]: 22.89 [1.98-265.34]) and an elevated initial LV end-systolic diameter (odds ratio [95% CI]: 0.86 [0.74-1.00]). CONCLUSIONS: An initial absence of arrhythmic events and elevated LV end-diastolic pressure in patients with SCMP may be predictors of the timely recovery of LV dysfunction.

Use of Nafamostat Mesilate as an Anticoagulant during Extracorporeal Membrane Oxygenation

Although the incidence of bleeding complications during extracorporeal membrane oxygenator (ECMO) support has decreased in various trials, bleeding is still the most fatal complication. We investigated the ideal dosage and efficacy of nafamostat mesilate for use with ECMO in patients with acute cardiac or respiratory failure. We assessed 73 consecutive patients who received ECMO due to acute cardiac or respiratory failure between January 2006 and December 2009. To evaluate the efficacy of nafamostat mesilate, we divided the patients into 2 groups according to the anticoagulants used during ECMO support. All patients of nafamostat mesilate group were male with a mean age of 49.2 yr. Six, 3, 5, and 3 patients were diagnosed with acute myocardial infarction, cardiac arrest, septic shock, and acute respiratory distress syndrome, respectively. The mean dosage of nafamostat mesilate was 0.64 mg/kg/hr, and the mean duration of ECMO was 270.7 hr. The daily volume of transfused packed red blood cells, fresh frozen plasma, and cryoprecipitate and the number of complications related to hemorrhage and thrombosis was lower in the nafamostat mesilate group than in the heparin group. Nafamostat mesilate should be considered as an alternative anticoagulant to heparin to reduce bleeding complications during ECMO.

A Case of Paraplegia Following Endovascular Stent Repair of Descending Thoracic Aortic Aneurysm

Paraplegia secondary to spinal cord infarction is a recognized complication of open thoracic and thoracoabdominal aortic aneurysm (TAA) repair. TAA is serious and unpredictable condition. Therefore, aortic repair requires thorough information on managing the potential complications will facilitate improve control the problem. We report the symptoms and management of paraplegia in a patient who underwent stent insertion as TAA.

Validity of Two Kinds of Physical Activity Tracker for Measuring Total Calorie Expenditures and Activities above Moderate Intensity

OBJECTIVE: To evaluate the validity of two kinds of physical activity trackers (PAT) during treadmill exercise. METHOD: 14 healthy people performed cardiopulmonary exercise test by means of Bruce protocol. The omnidirectional PATs were placed onto the right wrist and ankle, and the temperature sensing PATs were placed onto the right arm and lower leg. Simultaneous measurement of body motion was continuously recorded during cardiopulmonary exercise test. Then we checked total calorie expenditure and duration above moderated intensity activity (>3 METs) from each PATs and gas analyzer. RESULTS: Total calorie expenditures of PAT were significantly underestimated than gas analyzer, except the temperature sensing PAT applied onto the leg, but all of them showed significant correlation. The duration above moderate intensity activity of the PAT did not show significant difference comparing with gas analyzer, except the omnidirectional PAT applied onto the arm, but all of them showed significant correlation. CONCLUSION: Both omnidirectional PATs and temperature sensing PATs could estimate the total calorie expenditure and the duration above moderate intensity activity. But it is necessary to apply exercise-specific protocol to PAT to enhance the accuracy of estimating energy expenditure during periods of exercise.

Stress-Induced Cardiomyopathy: A Need for Prospective Multicenter Trials

No abstract available.

Acute Respiratory Failure Treated with Veno-venous Extracorporeal Membrane Oxygenation / 결핵및호흡기질환

BACKGROUND: Extracorporeal membrane oxygenation (ECMO) during severe acute respiratory failure helps to recover the pulmonary function. This study evaluated our experience with veno-venous ECMO in adult patients with acute respiratory failure. METHODS: From January 2007 to July 2009, ECMO was used on 54 patients. Of these 54 patients, 7 were placed on veno-venous ECMO for acute respiratory failure. The indications of ECMO were based on the lung dysfunction measured as a PaO2/FiO2 ratio <100 mm Hg on FiO2 of 1.0, or an arterial blood gas pH <7.25 due to hypercapnia despite the optimal treatment. EBS(R), Bio-pump(R), and Centrifugal Rotaflow pump(R) were used and all cannulations were performed percutaneously via both femoral veins. When the lung function was improved, an attempt was made to wean on ECMO at moderate ventilator settings followed by decannulation. RESULTS: Five of the 7 patients were male and the mean age was 46.3+/-18.3. The causes of acute respiratory failure were 3 cases of pneumonia, 2 near-drownings, 1 pulmonary hemorrhage due to acute hepatic failure and 1 mercury vapor poisoning. The mean support time of ECMO was 17.3+/-13.7 days. Of the 7 patients implanted with ECMO, 5 patients (71%) were weaned off ECMO and 3 patients (43%) survived to hospital discharge after a mean 89.6 hospital days. CONCLUSION: The early use of ECMO for acute respiratory failure in adults due to any cause is a good therapeutic option for those unresponsive to the optimal conventional treatments.

Association of Serum Gamma Glutamyltransferase and Fasting Blood Glucose among Middle Aged and Elderly in Chuncheon: Hallym Aging Study / 가정의학회지

BACKGROUND: Serum gamma-glutamyltransferase (GGT) was reported to be associated with type 2 diabetes, various cardiovascular disease risk factors, and individual components of metabolic syndrome. We performed a cross-sectional study to elucidate the relations between GGT and impaired fasting glucose (IFG). METHODS: The subject of this study included 693 adults (males 272, females 421) aged 45 years or over who have lived in Chuncheon, a suburban small-sized city. IFG was defined as elevated fasting plasma glucose (FPG) concentration of > or = 100 and or = 75th) were 1.0, 0.56, 1.57, and 2.79, respectively (P-value for trend 0.022). In women, the association between the risk of IFG and GGT was not statistically significant. CONCLUSION: This study suggests that elevated level of GGT within the normal range is an independent predictor of impaired fasting glucose in middle-aged or older men but not in women.