In order to study the exposure level of silica dust and the effects of silica dust on ventilatory function, respirable dust samples were collected by personal air samplers using NIOSH method 0500 from the selected foundry operations, and ventilatory function tests were performed on 209 male foundry workers and 239 male control subjects. Ventilatory indices such as forced vital capacity (FVC) , one-second forced expiratory volume (FEV1), ratio of FEV1 to FVC(FEV1 %), maximal mid-expiratory flow(MMF), peak expiratory flow rate (PEFR) and maximal expiratory flow at 25, 50 and 75 % of expired FVC (FEF25, FEF50, FEF75 were obtained by analyzing forced expiratory spirogram and maximal expiratory flow-volume curve which were simultaneously measured by Vitalography in standing position. The results were as follows : 1. The average quartz concentrations of respirable dust were the highest in melting operation (0.079 mg/m3) and followed by molding operation (0.051 mg/m3), finishing operation (0.041 mg/m3) and coremaking operation (0.023 mg/m3) in the descending order. 2. No significant differences for mean values of all ventilatory indices expressed as percent of predicted value were demonstrated between smokers and nonsmokers In foundry workers and control subjects. 3. Mean values of all ventilatory indices except FVC of foundry workers were significantly lower than those of control subjects. 4. Mean values of FEV1 %, MMF, FEF25, FEF50 and FEF75 expressed as percent of predicted value tended to decrease with increasing cumulative dust exposure. 5. In foundry workers, proportions of workers with low MMF, FEF50 and FEF75 were markedly higher than those with other indices, and were significantly increased with increasing cumulative dust exposure. 6. In foundry workers, 2 workers(1.0 %) were diagnosed as silicosis and the profusion of radiographic opacities were category 1/0 and q type. With the above considerations in mind, it suggested that increasing exposure of silica dust be associated with progressive deterioration in ventilatory function of an obstructive nature and that MMF, FEF50 and FEF75 be more sensitive indices in the detection of the early obstructive changes of air flow of workers exposed to silica dust.
Dust* ; Forced Expiratory Volume ; Freezing ; Fungi ; Humans ; Male ; National Institute for Occupational Safety and Health (U.S.) ; Peak Expiratory Flow Rate ; Quartz ; Silicon Dioxide* ; Silicosis ; Vital Capacity

The cytochrome P450 (CYP) 3A subfamily is estimated to participate in the biotransformation of 50% of the currently prescribed drugs. Four members of the CYP3A subfamily have been identified in humans: CYP3A4, CYP3A5, CYP3A7, and CYP3A43. Initial data suggested that CYP3A5 accounts for only a small proportion of the total hepatic CYP3A in about 20% of samples, but it was later revealed that CYP3A5 represents more than 50% of the total CYP3A amount in some individuals. Several genetic variants have been described for the CYP3A5 gene, of which the CYP3A5*3 allele (gA6986G), the most common form and leading to the loss of CYP3A5 activity, has been extensively investigated in the aspect of pharmacokinetics and disease risk. This review summarized the molecular characteristics of the CYP3A5 gene, and discusses the association of the CYP3A5*3 polymorphism with disease risks such as cancer and hypertension, along with its role in the pharmacokinetics of CYP3A substrates.
Alleles ; Biotransformation ; Cytochrome P-450 CYP3A ; Cytochrome P-450 Enzyme System ; Humans ; Hypertension ; Pharmacogenetics ; Pharmacokinetics

No abstract available.
Arthrogryposis* ; Humans ; Siblings*

PURPOSE: The aim of this study was to identify the level of Human papillomavirus (HPV) knowledge, intention of HPV vaccination, and barriers on HPV vaccination among male undergraduate students of Health department and Non-health department. METHODS: A total of 149 male undergraduate students responded to self-administered questionnaires about their HPV knowledge, HPV vaccination intention, and their barriers on HPV vaccination. ANOVA, t-test and χ2 test (Fisher's exact test) were used for data analysis. RESULTS: Mean score of HPV knowledge was 3.39±3.05, and there was significant difference between Health department (4.15±3.08) and Non-health department (2.58±2.82) in HPV knowledge (t=3.241, p=.001). There was no significant difference in HPV vaccination acceptance between the two groups. The barriers on HPV vaccination were 'lack of information about HPV vaccine efficacy' and 'lack of information about HPV vaccination time and strategy', and there were significant differences in barriers on HPV vaccination between the two groups. CONCLUSION: The knowledge on HPV was low, and HPV vaccination was hindered due to lack of information about HPV vaccine despite their intention to obtain HPV vaccine. HPV education to promote HPV vaccination should be targeted among male students.
Education ; Humans ; Intention* ; Male* ; Papillomaviridae ; Statistics as Topic ; Vaccination*

In 1,146 term neonates without perinatal problems who were born in Kwangju Christian Hospital, blood TSH levels were measured by immunoradiometric assay. In 397 term neonates among them, blood T4 levels were measured by radioimmunoassay in same specimens. 1) In normal neonates aged 3~5 days, 6~10 days, 11~20 days and 21~28 days, the TSH levels were 8.88+/-5.21(mean+/-SD), 9.44+/-5.16, 9.69+/-4.98, 11.96+/-3.75 IU/ml and the T4 levels were 11.41+/-2.79, 11.37+/-2.82, 11.19+/-2.63, 10.51+/-2.99 g/dl respectively. 2) No significant sex difference in TSH level was found in each age group, and TSH level did not correlate with birth weight. In neonates delivered by Cesarean section, TSH levels were lower than those of the normally delivered. 3) T4 levels did not differ between both sexes, and between types of delivery in each age group, and nor did it correlate with birth wweight 4) If the recall rate should be set at 0.2% of the total, TSH levels above 26.9 IU/ml would be required to recall for serum sampling. TSH level above 2 SD was 19.7 IU/ml. Cutoff points of T4 levels at 1.5 SD and 2 SD were 5.8 and 7.2 g/dl respetively, and the lowest 10th percentile was 7.4 g/dl.
Birth Weight ; Cesarean Section ; Female ; Gwangju ; Humans ; Immunoradiometric Assay ; Infant, Newborn* ; Mass Screening* ; Parturition ; Pregnancy ; Radioimmunoassay ; Sex Characteristics

We observed 233 twins and 2 triplets cases among 16,774 newborns delivered at Kwangju Christian Hospital during 5 years from Jan, 1986 to Dec. 1990. The results obtained are as follows: 1) The overall incidence of win pregnancy was 1:72(1.4%)and that of triplets 1:z8387(0.01%). 2) The average male-female sex ratio of twins was 1.06:1 with male predominating and 86% were same sex pairs(male-male 43.8%, female-female 41.3%), only 14.0% being different. 3) The incidence of twin delivery tended to be more prevalent in primigravidas. 4) More than half of all cases(248/466)had birth weight less than 2,500 g, with 33% falling into the range of 2,001~2,500 g. No statistically significant differences of birth weight were noted between both sexes or among birth sequences. 5) At 5 minute after birth, Apgar score below 7 were found in 9.5% of the firtst born and in 11.6% of second born twins, with no significant difference noted. 6) The perinatal mortality rate of twins were 94.4/1,000 and the perinatal mortality rates of first and second twins were 77.2 and 111.6, resp., but not significantly different. The larger the difference of birth weight between co-twins, the shorter thee gestational age and the less the birth weight between co-twins, the shorter the gestation age and the less the birth weight of twins, the larger became the perinatal mortality. But, it was not related to the parities or maternal ages. 7) The overall principal causes of perinatal death were still birth (45.5%), respiratory distress syndrome(36.4%) and immaturity(11.4%) in descending order.
Apgar Score ; Birth Weight ; Gestational Age ; Gwangju ; Humans ; Incidence ; Infant, Newborn ; Male ; Maternal Age ; Parturition ; Perinatal Mortality ; Pregnancy ; Sex Ratio ; Triplets ; Twins*

No abstract available.
Plasmapheresis* ; Prednisolone* ; Purpura, Thrombotic Thrombocytopenic*

PURPOSE: To evaluate the clinical significance of the screening mammography in the detection of the breast diseases, especially breast carcinoma. MATERIALS AND METHODS: We analyzed 1,800 cases of mammography retrospectively. The mammography was done as a part of routine check in Health Counselling Center, Korea University Medical Center, during 9 months from November 1993 to July 1994. The age range was from 23 years to 76 years, mean 49.8 years, and the largest age group was 6th decade(31.4%). According to the mammographic findings, we divided the subjects into three groups; normal group, abnormal group in need of follow up study, abnormal group requiring biopsy. RESULT: On mammography, the normal group consisted of 1,534 cases(85%), and the abnormal group consisted of 266 cases(15%). The abnormal findings were benign-looking calcification(n=140), fibroadeno ma (n=29), fibrocystic changes (n=27), cyst(n=23), malignant lesion(n=15), lipoma(n=7), and others. In four of 15 cases, which were suspected to be malignant on mammograms, breast carcinoma was confirmed pathologically. In four cases of breast carcinoma, one was under 40 and the other 3 were over 50 years of age. All of the breast cancers were under 3cm in size, and the mammographic findings of breast cancer included spiculated margin(n=3), parenchymal disortion(n=3), malignant calcification(n=2) and enlarged axillary node (n=l). CONCLUSION: Screening mammogram is helpful for early detection of non-palpable breast cancer, especially for women over 50 years of age.
Academic Medical Centers ; Biopsy ; Breast Diseases* ; Breast Neoplasms ; Breast* ; Female ; Follow-Up Studies ; Humans ; Korea ; Mammography* ; Mass Screening* ; Retrospective Studies

Approximately 50% of people with diabetes will at some point undergo surgery related to their disease. Since patients with diabetes mellitus are four times more likely to have silent ischemia and coronary artery disease compared to the risk of non-diabetic patients, they are at a higher risk for perioperative complications. Preoperative evaluation can identify many patients at increased risk of an adverse cardiac event, and appropriate perioperative management can reduce that risk. Although there is great potential to reduce perioperative cardiovascular risk, it is also impractical to perform cardiovascular testing prior to non-cardiac surgery in all patients. Therefore, it is important to determine perioperative risk and the appropriateness of cardiac testing and to provide prophylactic treatment to reduce risk. Perioperative cardiac risk stratification is determined by comorbidity, other cardiovascular risk factors, functional status, and type of surgery. By categorizing the cardiac risk, physicians can perform surgery in low risk patients without the need for cardiac testing. When preoperative risk assessment identifies intermediate- and high-risk patients, further cardiac testing might be warranted. This article reviews the perioperative evaluation of patients with diabetes with a clinical focus on cardiovascular risk.
Comorbidity ; Coronary Artery Disease ; Diabetes Mellitus ; Humans ; Ischemia ; Perioperative Care ; Risk Assessment ; Risk Factors ; Risk Management

No abstract available.