The rapid economic development of Korea since 1960 has also brought a rapid urbanization process, and recently many rural areas have begun to show actual depopulation, in which particularly the young, productive and high educated groups are leaving for cities. More than 70% of migrations go to large cities such as Seoul, Pusan and Taegu. Their main motives for migration are to seek a job in urban areas. The study showed following results; The rate of migration a year was 1% of total population. Regarding the age of migrators belong to between 10-39 years old, especially migrator aged 10-29 years as comprised 87%. The educational level of migrator was a little higher than that of the residents. Considering the sibling order of migrators, the traditional value system for first son seemed to change. Concerning the place of destination, more than 70% of migrators moved to large cities such as Seoul, Pusan and Taegu. The main motivation of migration was to seek a job in urban areas. The occupation at the place of destination were factory workers, employee at company, students, salesmen, farmers and public officials in that order.
Busan ; Daegu ; Economic Development ; Emigration and Immigration* ; Humans ; Korea ; Motivation ; Occupations ; Seoul ; Siblings ; Urbanization

BACKGROUND AND OBJECTIVES: Heart rate variability has been known to be a prognostic factor of heart disease. However, determinants of heart rate variability in general korean population without clinical heart disease have not been studied. Objectives of this study were to measure heart rate variability in general population and to investigate clinical determinants of heart rate variability. METHODS:Heart rate variability measures were obtained by LRR-03TM and MemCalcTM software (GMS, Tokyo, Japan) from public officials in a district of Seoul and their families(n=69). Predictors of heart rate variability included age, gender, heart rate, smoking status, systolic blood pressure, diastolic blood pressure, serum total cholesterol, HDL-cholesterol. Univariate analysis and analysis of variance of low frequency power(0.04-0.15 Hz), high frequency power(0.15-0.30 Hz), and total power spectrum in relation to explanatory variables were done. In order to select determinants of heart rate variability, multiple linear regression model of each heart rate variability measure was created and stepwise selection method was applied. RESULTS: Analysis of variance showed that older age, higher heart rate, body mass index > or =27, systolic blood pressure > or =140 mmHg, diastolic blood pressure > or =90 mmHg, and serum total cholesterol > or =240 mg/dl were negatively associated with one or more heart rate variability measures. Serum HDL-cholesterol > or =35 mg/dl was positively associated with low and high frequency power. Multiple linear regression analyses showed that age and heart rate were the major determinants, gender and cardiovascular risk factors such as diastolic blood pressure, HDL-cholesterol, and smoking contributed to one or more heart rate variability measures. CONCLUSIONS: Age, heart rate, gender, and cardiovascular risk factors must be considered when evaluating heart rate variability.
Blood Pressure ; Body Mass Index ; Cholesterol ; Heart Diseases ; Heart Rate* ; Heart* ; Linear Models ; Risk Factors ; Seoul ; Smoke ; Smoking

No abstract available.
Myocardial Infarction*

BACKGROUND: Seborrheic dermatitis is a very common chronic inflammatory disease. Previous studies suggested that, Pityrosporum, lipophilic fungi, may play an important role in the pathogenesis of the disease. OBJECTIVE: The purpose of this study was to investigate the disease clinically and mycologically for better understanding of the pathogenesis. METHODS: Two hundred and one new patient.s with seborrheic dermatitis of the scalp and 67 norrnal subjects were obs!,rved clinically by the dermatologist and studied stat,istically by questionnaires. A mycologic study of Pityrosporum was also performed by direct smear. RESULTS: Among a total of 201 patients wit,h seborrheic dermatitis, 72.6% had pityriasis sicca, 10.5% had pityr iasis steartoides and 16.9% had inflammatory seborrheic dermatitis. On clinical grading by the Kligman.. scale, grade III(slightly scaling) was the most common in the patients and 52.6% of the norma. subjects were below grade II (no scaling). Spores of Pityrosporum were observed in 76.7% of the patients and 91.5% of the normal subjects. The incidence of Pityrosporum was lower particularly in t,he patients with inflammatory seborrheic dermatitis t,han in other pa~tients groups. CONCLUSION: According to the results of the study, it, is difficult to conclude that Pityrosporum is a main causative ager t of seborrheic dermatitis. In addition, it is thought t.hat further studies of the role of Pityrosporum in seborrheic dermatitis are needed.
Dermatitis, Seborrheic* ; Fungi ; Humans ; Incidence ; Malassezia* ; Pityriasis ; Scalp* ; Spores ; Surveys and Questionnaires

BACKGROUND: Seborrheic dermatitis is a very common chronic inflammatory disease. Previous studies suggested that, Pityrosporum, lipophilic fungi, may play an important role in the pathogenesis of the disease. OBJECTIVE: The purpose of this study was to investigate the disease clinically and mycologically for better understanding of the pathogenesis. METHODS: Two hundred and one new patient.s with seborrheic dermatitis of the scalp and 67 norrnal subjects were obs!,rved clinically by the dermatologist and studied stat,istically by questionnaires. A mycologic study of Pityrosporum was also performed by direct smear. RESULTS: Among a total of 201 patients wit,h seborrheic dermatitis, 72.6% had pityriasis sicca, 10.5% had pityr iasis steartoides and 16.9% had inflammatory seborrheic dermatitis. On clinical grading by the Kligman.. scale, grade III(slightly scaling) was the most common in the patients and 52.6% of the norma. subjects were below grade II (no scaling). Spores of Pityrosporum were observed in 76.7% of the patients and 91.5% of the normal subjects. The incidence of Pityrosporum was lower particularly in t,he patients with inflammatory seborrheic dermatitis t,han in other pa~tients groups. CONCLUSION: According to the results of the study, it, is difficult to conclude that Pityrosporum is a main causative ager t of seborrheic dermatitis. In addition, it is thought t.hat further studies of the role of Pityrosporum in seborrheic dermatitis are needed.
Dermatitis, Seborrheic* ; Fungi ; Humans ; Incidence ; Malassezia* ; Pityriasis ; Scalp* ; Spores ; Surveys and Questionnaires

OBJECTIVES: The aim of this study was to evaluate the relationship between shift work and work-related injuries in a representative sample of Korean workers. METHODS: We used data from the Korean Working Condition Survey of 2006. The participants were 7,075 Korean workers 15 to 64 years of age. Logistic regression was employed to estimate the relationship between shift work and work-related injury using the SAS version 9.2 program. RESULTS: Shift work was significantly related to work-related injuries compared to non-shift workers(OR 2.40, 95% CI=1.65~3.48). When personal and occupational risk factors were accounted for, shift work had a statistically meaningful relationship with work-related injuries compared to non-shift work(OR 1.79, 95% CI=1.20~2.66). CONCLUSIONS: In this study, shift workers appear to have a higher risk of work-related injuries compared to non-shift workers. Work-related injuries in shift workers could be attributed to circadian rhythm disorder and sleep problems. Suitable arrangements that ensure flexible working times are needed for shift workers. Further study will be needed to identify and mitigate work-related injuries among shift workers.
Chronobiology Disorders ; Dietary Sucrose ; Humans ; Logistic Models ; Phenothiazines ; Risk Factors

The masticatory function of tooth is maintained by the periodontal health, and periodontal health is also maintained by the masticatory function. Bite forces are withstanded by the PDL, and this thought to be through the viscoelastic theory. Mobility test and Bite force test are used to evaluate the viscoelastic theory of the PDL. In this study, the bite force test was used. In the same conditions of quantity of the supporting tissue, the maximum bite force according to the quality of the supporting tissue was evaluated. The study was conducted on 40 patients with moderate adult periodontitis, who were indications to the modified widman flap treatment. The maximum bite force in the premolar and molar regions were tested before treatment, 3weeks and 4 weeks after treatment. and the results were as follows. 1. In the premolar region, 3 weeks and 4 weeks after treatment showed higher maximum bite force than before treatment. And in the molar region the maximum bite force decreased 3 weeks after treatment, but increased after 4 weeks, compared to before treatment. 2. In the 1st premolar, there were only significant difference between before and 3 weeks after treatment, and between and 4 weeks after treatment. 3. In the 2nd premolar, there were only significant difference between before and 3 weeks after treatment, and between and 4 weeks after treatment. 4. In the 1st molar, there were no significant difference between before, 3 weeks after treatment, 4 weeks after treatment. 5. In the 2nd molar, there were no significant difference between before, 3 weeks after treatment, 4 weeks after treatment. From the results above, it shows that there were improvements in the maximum bite force through specific periodontal treatments, and thus it can be considered in clinical situations, that selection of the prosthodontic material, decisions of extraction, evaluation of the prognosis after periodontal treatment is a helpful method.
Bicuspid ; Bite Force* ; Chronic Periodontitis ; Humans ; Molar ; Prognosis ; Prosthodontics ; Tooth

The Currarino triad is a unique complex of congenital caudal anomalies, including anorectal malformation, sacral bony defect and presacral mass. This triad may be associated with Mullerian duct anomalies, such as duplication of the vagina and uterus. Each of these diseases has a familial tendency and sometimes coexist within families. But, when coexisting in familial cases, nearly all reported cases revealed mutations of the motor neuron and pancreas homeobox 1 (MNX1) gene. Familial cases of Currarino triad combined with Mullerian duct anomaly without MNX1 gene mutation are very rare. Here we report cases of mother and daughter, who had Currarino triad and Mullerian duct anomaly without MNX1 gene mutation, along with a brief literature review.
Genes, Homeobox ; Humans ; Mothers* ; Motor Neurons ; Mullerian Ducts ; Nuclear Family* ; Pancreas ; Uterus ; Vagina

BACKGROUND: Amezinium methylsulfate(Risumic) is the useful drug in the treatment of essential hypotension. This drug elevate blood pressure by stimulating sympathetic nervous system and improve symptoms related hypotension. This study was designed to evaluate efficacy and safety of Risumic for patients with essential hypotension. METHODS: This study was performed in patients with systolic blood pressure less than 100mmHg from June, 1999 to December, 1999. Risumic blood pressure response, improvement of symptom and side effect were examined in a double-blind, placebo-controlled, crossover trial. RESULTS: Total of 54 patients participated in this study and only 55.6% of them were finished and the rest of them(44.4%) was stopped. 6 patients of this patients were stopped because of side effects. But there was no difference in side effects in Risumic and placebo periods. In diastolic BP, Risumic group is 5mmHg higher than placebo group. And then there was significant difference in statistics. CONCLUSIONS: In essential hypotensive patients, Risumic is elevater DBP than SBP, side effects frequency was no significance difference in Risumic and placebo group.
Blood Pressure ; Humans ; Hypotension ; Sympathetic Nervous System

BACKGROUND: Several biochemical mediators, such as substance P, calcitonin gene-related peptide (CGRP) and prostaglandin E2, have been demonstrated to be involved in herniated or degenerated disc-induced radiculopathy. The authors tested the hypothesis that these mediators would existed in the epidural space of humans. METHODS: Thirty nine patients were divided into two groups; 27 patients, who were diagnosed with spinal stenosis (stenosis group), and 12 scheduled for epidural anesthesia, without a history of back pain (control group). Under fluoroscopic guidance, an epidural catheter was introduced through the caudal space and placed into the anterior and posterior spaces, up to and around the epidural adhesive area, in the stenosis group. In the control group, the catheter was placed into the posterior epidural space through the L3 4 or L4 5 intervertebral space. Epidural irrigation was performed with 10 ml of saline, via an epidural catheter. Aspirated lavage fluid was collected, and the concentrations of biochemical mediators (substance P, CGRP and prostaglandin E2) measured using an enzyme immunoassay kit. RESULTS: Substance P, CGRP and prostaglandin E2 were detected in all the epidural lavage fluids from both groups. The concentrations of substance P and prostaglandin E2 in the stenosis group were higher than those of the control (P < 0.05). However, there was no difference in the CGRP levels between the two groups. In the stenosis group, the concentrations of these three mediators in the anterior epidural space were no different to those in the posterior space. CONCLUSIONS: These results suggest that biochemical mediators, such as substance P and prostaglandin E2, in the epidural space might be partly involved in pain mechanism associated with spinal stenosis.
Adhesives ; Anesthesia, Epidural ; Back Pain ; Calcitonin Gene-Related Peptide* ; Calcitonin* ; Catheters ; Constriction, Pathologic ; Dinoprostone* ; Epidural Space* ; Humans* ; Immunoenzyme Techniques ; Radiculopathy ; Spinal Stenosis ; Substance P* ; Therapeutic Irrigation