OBJECTIVES: The purpose of the present study was to identify the association between presenteeism and long working hours, shiftwork, and occupational stress using representative national survey data on Korean workers. METHODS: We analyzed data from the second Korean Working Conditions Survey (KWCS), which was conducted in 2010, in which a total of 6,220 wage workers were analyzed. The study population included the economically active population aged above 15 years, and living in the Republic of Korea. We used the chi-squared test and multivariate logistic regression to test the statistical association between presenteeism and working hours, shiftwork, and occupational stress. RESULTS: Approximately 19% of the workers experienced presenteeism during the previous 12 months. Women had higher rates of presenteeism than men. We found a statistically significant dose-response relationship between working hours and presenteeism. Shift workers had a slightly higher rate of presenteeism than non-shift workers, but the difference was not statistically significant. Occupational stress, such as high job demand, lack of rewards, and inadequate social support, had a significant association with presenteeism. CONCLUSIONS: The present study suggests that long working hours and occupational stress are significantly related to presenteeism.
Female ; Humans ; Logistic Models ; Male ; Republic of Korea ; Reward ; Salaries and Fringe Benefits*

BACKGROUND: Cefcapene pivoxil hydrochloride (CFPN-PI) is an oral ester cephalosporin antibiotic with a broad spectrum. In this study, we investigated the pharmacokinetics (PK) and tolerability of CFPN-PI following single oral administration in healthy Korean subjects. METHODS: An open label, dose escalation, parallel group study was conducted in 18 healthy male volunteers. A single dose of CFPN-PI was administered to 6 subjects in each treatment group of 100, 150 and 200 mg. Serial blood and urine samples were collected up to 12 h and 24 h after dosing, respectively. Plasma and urine concentrations of cefcapene were measured by HPLC-UV. PK parameters were estimated using non-compartmental analysis. For the safety evaluation, adverse event monitoring, clinical laboratory tests and physical examination were performed throughout the study. RESULTS: Median values of time to peak plasma concentration were observed around 1.5 to 2.0 h. Maximum plasma concentrations (Cmax) were 1.04 +/- 0.22, 1.24 +/- 0.46 and 1.56 +/- 0.43 mg/L (mean +/- SD), and area under the plasma concentration time curve (AUCinf) were 2.94 +/- 0.46, 3.97 +/- 1.28 and 4.70 +/- 1.19 h*mg/L in 100, 150 and 200 mg dose groups, respectively. The differences of dose normalized Cmax and AUCinf among three groups were not statistically significant. The fractions of drug excreted in urine unchanged were 31.5 % - 42.9 %. There were no serious adverse events or clinically significant abnormalities related to CFPN-PI. CONCLUSION: CFPN-PI was well tolerated with single oral administration and showed a linear PK property within 100 - 200 mg in healthy Korean male subjects.
Administration, Oral* ; Humans ; Male ; Pharmacokinetics ; Physical Examination ; Plasma

PURPOSE: This study was designed to evaluate the efficacy of a combination treatment of S-1 plus either irinotecan or docetaxel for advanced/metastatic non-small cell lung cancer (NSCLC) patients who have already failed 3 or more lines of treatment. MATERIALS AND METHODS: This was a prospective single center phase II study. The eligible patients received S-1 40 mg/m2 twice a day orally on days 1 though 14 combined with irinotecan 150 mg/m2on D1 only or docetaxel 35 mg/m2 on D1 and D8. The treatment was repeated every 3 weeks until disease progression, unacceptable toxicity, or patient refusal. The choice between the two regimens was made at the discretion of the treating physician. RESULTS: A total of 14 patients participated in the study. There were 3 patients with squamous cell carcinoma, 9 with adenocarcinoma, and 2 with NSCLC, NOS. Eight of the patients were male. There were 8 patients with an Eastern Cooperative Oncology Group (ECOG) of 1, and 6 patients with an ECOG of 2. All the patients had already been treated with platinum-based chemotherapy and epidermal growth factor receptor tyrosine kinase inhibitor therapy. Out of the 14 patients, 10 received irinotecan and S-1 and the other 4 received docetaxel and S-1. Twelve patients had also received pemetrexed. Disappointingly, there were no response from 2 patients with a stable disease, and therefore, as per the protocol, we stopped the study early. With a median follow-up time of 49 months, the median survival time was 5.6 months (95% confidence interval, 4.3 to 6.9 months). CONCLUSION: S-1 containing doublets did not show activity in this population as a salvage treatment and further investigation cannot be recommended.
Adenocarcinoma ; Camptothecin ; Carcinoma, Non-Small-Cell Lung ; Carcinoma, Squamous Cell ; Disease Progression ; Disulfiram ; Follow-Up Studies ; Glutamates ; Guanine ; Humans ; Male ; Prospective Studies ; Protein-Tyrosine Kinases ; Receptor, Epidermal Growth Factor ; Salvage Therapy ; Taxoids ; Pemetrexed

Magnetic resonance image (MRI) is the most sensitive imaging test of the spine in routine clinical practice. Unlike conventional x-ray examinations and computed tomography scans, high-quality magnetic resonance images can be assured only if patients are able to remain perfectly still. However, some patients find it uncomfortable to remain still because of pain. In that condition, interlaminar cervical epidural injections can reduce pain and allow the procedure. When using air with the "loss of resistance" technique in epidural injections to identify the epidural space, there is the possibility of injected excessive air epidurally to mimic a herniated disc. We describe a case report of epidural air artifact in a cervical MRI after cervical epidural injections.
Artifacts ; Epidural Space ; Humans ; Hydrazines ; Injections, Epidural ; Intervertebral Disc Displacement ; Magnetic Resonance Spectroscopy ; Spine

Visceral fat has been reported to be associated with nonalcoholic fatty liver disease (NAFLD) and the metabolic syndrome (MetS). We assessed the prevalence of both NAFLD and the MetS, measured visceral fat thickness VFT), and estimated the physical activity indexes of 224 relatively healthy hospital workers. We also investigated the associations between both VFT and physical activity index and each of NAFLD and the MetS. The MetS was diagnosed according to the guidelines outlined by the Adult Treatment Panel III, and NAFLD was diagnosed by ultrasonography. Subjects with hepatitis B and C infections and those reporting moderate alcohol consumption were excluded from the study. The prevalence of the MetS was 11.6% and that of NAFLD was 41.5%. Many subjects with the MetS had NAFLD (73.1%), and some subjects with NAFLD (20.4%) also had several components of the MetS (p=0.001). VFT was significantly increased by both the addition of components of the MetS and the severity of NAFLD (p<0.001). In addition, VFT was independently associated with NAFLD (odds ratio [OR], 1.10; 95% confidence interval [CI], 1.02-1.19) in subjects with more than 2 components of the MetS. In contrast, habitual physical activity was reversely associated with NAFLD (OR, 0.29; 95% CI, 0.10-0.87). In conclusion, an increased visceral fat content and reduced physical activity could be not only biological markers but also therapeutic targets in the treatment of NAFLD and the MetS.
Adult ; Alcohol Drinking ; Blood Pressure ; Comorbidity ; Fatty Liver/*physiopathology ; Female ; Humans ; Hyperinsulinism/complications ; *Intra-Abdominal Fat ; Male ; Metabolic Syndrome X/*physiopathology ; Middle Aged ; Multivariate Analysis ; Odds Ratio

BACKGROUND: Carotid atherosclerosis has been known to be associated with systemic inflammatory status. The present study aimed to investigate the relationship between hepatitis viral infection or vaccination and carotid atherosclerosis in a relatively healthy population. METHODS: A cross-sectional study was performed in 281 subjects (mean age+/-SD, y; 43.8+/-7.2) in the Chonbuk national university hospital. All the participants were examined for the carotid intima-media thickness (IMT) in both common carotid, carotid bulb, and internal carotid arteries. Hepatitis B surface antigen (HBsAg) and IgG antibodies against hepatitis B and C virus (anti-HBs and anti-HCV) were determined by enzyme linked immunosorbent assays. RESULTS: Twelve subjects (4.3%) were HBsAg seropositive and 6 (2.1%) were anti-HCV positive but the positivity did not affect the mean carotid IMT. However, the hepatitis B-exposure group including both the HBsAg positive and anti-HBs positive without vaccination history showed a significantly higher carotid IMT (mean+/-SD, mm; 0.757+/-0.107 vs. 0.728+/-0.105, P=0.031), even after adjusting for the potential confounders. And, in the subgroup having anti-HBs, the carotid IMT was lower in the hepatitis B vaccinated subjects than in the others (0.725+/-0.103 vs. 0.760+/-0.111, P=0.019). CONCLUSIONS: Subjects exposed to the hepatitis B pathogen, even though they had anti-HBs, showed the higher carotid IMT, and the participants with a vaccination history demonstrated the lower IMT values. Subsequent study in a large representative population might be needed to further delineate the characteristic associations.
Antibodies ; Carotid Artery Diseases ; Carotid Artery, Internal ; Carotid Intima-Media Thickness* ; Cross-Sectional Studies ; Hepatitis B ; Hepatitis B Surface Antigens ; Hepatitis* ; Immunoglobulin G ; Jeollabuk-do ; Vaccination

OBJECTIVE: This study was performed to evaluate relationship of burdened work and musculoskeletal symptoms in small-to-medium sized enterprises. METHOD: After a questionnaire survey was administered to 9,950 workers in 122 workplace, 7,626 workers(76.6%) were finally selected for the study analysis. Industrial hygienists visited 122 small-to-medium sized enterprises to investigate the presence of burdened works within the workplace. The selection of jobs with significant burden was based on the Ministry of Labor's recent notification in 11 types of job description associated with musculoskeletal disorders. The subjects of this study were then divided into three categories. 1) non-burdened white collar workers, 2) non-burdened blue collar workers, and 3) burdened workers (include some VDT workers). Multiple logistic regression was used to evaluate the relationship between burdened work and musculoskeletal symptoms. RESULTS: The burdened workers reported significantly more musculoskeletal symptoms than non-burdened white collar workers and non-burdened blue collar workers(OR:1.57, 95% CI: 1.314-1.875). There was no significant difference in reports of musculoskeletal symptoms between non-burdened white and blue collar workers. CONCLUSION: To prevent or diminish musculoskeletal disorders in small-to-medium sized enterprises, we need to better manage burdened works.
Job Description ; Logistic Models ; Questionnaires

BACKGROUND: The purpose of this study is to evaluate the patients' general perception about the analgesics and the effects of the preoperative education about analgesics and patient-controlled analgesia (PCA). METHODS: One hundred patients scheduled for elective gastrectomy were randomly allocated into two groups. In control group (n = 50), patients were given conventional preanesthetic visit with questionnaire survey on PCA one day before operation. In study group (n = 50), patients were sufficiently explained about postoperative analgesia and PCA by anesthesiologist and given precise explanation sheet about PCA. Total amounts of drug used in PCA as well as rescue analgesics, the pain scores, and side effects were compared. RESULTS: 62.2% of patients had much information from various sources that analgesics effects positively in the recovery phase, but actually 73.7% of patients considered that analgesics do not seem to have any influence on the recovery after operation. There was no difference between the amounts of total PCA used, rescue analgesics, and the pain scores. However, the educated patients complained less dizziness at postoperative days (POD) one. Also, the number of patients excluded from study due to the PCA discontinuation secondary to related side effects was less in educated patients (P = 0.025). CONCLUSIONS: Preoperative education about analgesics and PCA failed to demonstrate significant decrease in the amount of analgesics and of pain scores. However, it lowered the incidence of PCA discontinuation due to side effects.
Analgesia ; Analgesia, Patient-Controlled* ; Analgesics* ; Dizziness ; Education* ; Gastrectomy ; Humans ; Incidence ; Passive Cutaneous Anaphylaxis ; Postoperative Care

OBJECTIVE: The purpose of this study was to determine whether funisitis is associated with changes in the umbilical cord plasma concentration of interleukin-6 (IL-6) and matrix metalloproteinase-8 (MMP-8), microbial invasion of the amniotic cavity and neonatal outcome. METHODS: The relationship among the presence of funisitis, IL-6 and MMP-8 concentrations in umbilical cord plasma at birth, the results of amniotic fluid culture performed within 5 days of birth was examined in 83 consecutive singleton births (20-35 weeks' gestation). Funisitis was diagnosed in the presence of neutrophil infiltration into the umbilical vessel wall or Wharton's jelly. The IL-6 and MMP-8 concentration was measured with a specific immunoassay. Amniocentesis was performed in 47 patients within 5 days of birth. RESULTS: (1) Funisitis was present in 21.7% of patients. (2) Patients with funisitis had a significant higher cord plasma IL-6 concentration, but had no significant difference in cord plasma MMP-8 concentration. (3) Clinical chorioamnionitis was more common in patients with funisitis than those without funisitis. (4) A cord plasma IL-6 > 6.34 pg/ml had a sensitivity of 77.8% and a specificity of 75.4% in the identification of funisitis. (5) No correlation between cord blood plasma IL-6 concentration and MMP-8 concentration was found. (6) There was no significant correlation between gestational age at birth and cord blood plasma MMP-8 concentrations, but there appeared to be a trend to increase of cord plasma MMP-8 concentrations as gestational ages at birth were increased. (7) Neonates with congenital sepsis had a significantly higher cord plasma IL-6 and MMP-8 concentration than those without congenital sepsis. CONCLUSION: In patient with funisitis, umbilical cord plasma IL-6 concentrations were higher than those without funisitis, but umbilical cord plasma MMP-8 concentrations had no significant difference in each group. The umbilical cord plasma IL-6 and MMP-8 can be useful as a predictor of the occurrence of congenital sepsis in preterm infant.
Amniocentesis ; Amniotic Fluid* ; Chorioamnionitis* ; Female ; Fetal Blood ; Gestational Age ; Humans ; Immunoassay ; Infant, Newborn ; Infant, Premature ; Interleukin-6* ; Matrix Metalloproteinase 8* ; Neutrophil Infiltration ; Parturition ; Plasma* ; Pregnancy ; Sensitivity and Specificity ; Sepsis ; Umbilical Cord* ; Wharton Jelly

OBJECTIVE: To determine the distribution and expression of steroid acute regulatory (StAR) protein in human oocyte and embryo in relation to apoptosis. METHODS: Immuno-labelling and confocal microscopy were applied to examine the localization of StAR protein in human oocytes and embryos. Western blot analysis was also used for qualitative and quantitative assessment of StAR protein expression. RESULTS: There were lipid droplet accumulation in fragmented human oocytes and embryos. StAR protein (30 kDa) expression was detected in human oocytes and embryos. The level of StAR protein expression was lower in the fragmented group than the normal group. CONCLUSION: The present study provides evidence for involvement of StAR protein in the apoptosis of fragmented oocytes and embryos during in vitro fertilization (IVF) program as well as in the normal development of human oocytes and embryos.
Apoptosis* ; Blotting, Western ; Embryonic Structures ; Female ; Fertilization in Vitro ; Humans* ; Microscopy, Confocal ; Oocytes* ; Ovary*