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Byung Mann Cho 11 Articles
Chromosome Aberrations and Sister Chromatid Exchanges of Hospital Workers Exposed to Radiation.
Ae Ri Cha, Mi Sun Kim, In Kyung Hwang, Su Ill Lee, Byung Mann Cho, Don Kyoun Kim
Korean J Prev Med. 1998;31(4):616-627.
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AbstractAbstract PDF
In order to evaluate the cytogenetic hazard among hospital workers potentially exposed to low dose of radiation, the analysis of chromosome aberrations(CA) and sister chromatid exchanges(SCE) in lymphocytes were performed in 79 hospital workers and 79 non-exposed workers. The mean frequency of chromosomal exchange and deletion(respectively, 0.20X10-2/cell and 0.39X10(-2)/cell) in the exposed group were significantly higher than those(0.07X10(-2)/cell and 0.23X10-2/cell) in control group. The frequency of sister chromatid exchanges was 5.04/cell in the control vs. 6.57/cell in the exposed group. There were also significant differences in the mean frequencies of CA and SCE adjusted for age, sex, smoking, drinking between two groups. There were no evidence of significant increase of CA and SCE according to the department or duration of employment. But the frequency of cells having chromosome aberration was significantly higher in the exposed group than in the control group related to duration of employment. There was no dose-effect relationship between the cumulative doses and the frequency of CA and SCE. But in the case of last 1 yr cumulative dose, there were evidence of significant dose-dependant increase of chromosome type CA and percentage of cells with aberration. The result suggest that there is cytogenetic hazard in risk group like hospital workers handling low dose radiation. And the analysis CA and SCE are useful biological indicators for the exposure of low dose level of radiation.
Summary
A Study on obesity pattern and related factors of the doctors.
Young Sil Kim, Hye Sook Park, Bong Su Cho, Yeong Wook Kim, Kwang Wook Koh, Soo Yong Kang, Ae Ri Cha, Cheol Ho Yi, In Kyung Hwang, Byung Mann Cho, Su Ill Lee, Don Kyoun Kim
Korean J Prev Med. 1997;30(4):708-718.
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AbstractAbstract PDF
The author surveyed overall obesity indicies and factors concerned with obesity such as dietary intake, physical activity, stress and life style with the subject of doctors. The number of subjects was total 508 with 396 men and 112 women. They were subgrouped into surgical part, medical part and service and basic part by speciality. And also subgrouped into intern and resident, pay doctor, and practitioner by working type. The results were as follows. 1) Obesity indices: BMI of total doctor was 23.1+/-2.8, and WHR was 0.87+/-0.08 and overweight prevalence(BMI>25.0) was 23.6 %. It was within normal limit but slightly over the Korean standard. The degree of obesity indices of subgroups by speciality was "surgical part > medical part > service and basic part", and by working type was "practitioner > pay doctor > intern and resident". 2) Dietary intake and Physical activity: Average dietary intake was 2148+/-451 kcal/day. The degree of dietary intake by speciality was "surgical part > medical part > service and basic part". By working type it was "practitioner > pay doctor > intern and resident". Average physical activity was 29+/-5 METs/day. The degree of physical activity also showed similar pattern. But there was no significant difference among each groups. 3) Comparison between over-weight and non-over-weight group: The items that showed significant difference between two groups were dietary intake, skip breakfast, regular exercise, smoking, heavy drinking, chronic disease etc.
Summary
A Study on Serum Lipid Levels of Children in Pusan.
Soo Yong Kang, Byung Mann Cho, Su Ill Lee, In Kyong Hwang, Yeung Wook Kim, Young Sil Kim, Ae Ri Cha, I Ho Ha, Chel Ho Lee, Don Kyoun Kim
Korean J Prev Med. 1997;30(4):686-696.
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This is a cross-sectional study to evaluate the serum lipid levels of children living in Pusan in 1996. The distribution of age is from 2 years old to 12 years old. In female children mean total cholesterol is 171.4+/-26.2mg/dl, triglyceride is 104.7+/-50.6mg/dl, HDL-cholesterol is 54.4+/-14.8mg/dl, and LDL-cholesterol is 95.4+/-32.9mg/dl. In male children mean total cholesterol is 167.9+/-25.2mg/dl, triglyceride is 90.6+/-45.5mg/dl, HDL-cholesterol is 55.4+/-11.7mg/dll, and LDL-cholesterol is 94.4+/-23.6mg/dl. The percentile of serum lipid levels is measured in children. The 95th percentile of serum total cholesterol is 210mg/dl in male children, and 214mg/dl in female children. And, the 95th percentile of serum triglyceride is 184mg/dl in male children, and 191mg/dl in female children. And, the 95th percentile of LDL-cholesterol is 133mg/dl in male children, and 135mg/dl in female children. Serum total cholesterol is positively related to age(r=0.18), height(r=0.08), weight(r=0.17), obesity index(r=0.12), and negatively related to father's education level(r=-0.13), mother's education level(r=-0.13). Serum triglyceride is positively related to weight(r=0.23), age(r=0.31) and negatively related to father's education level(r=-0.12), mother's education level(r=-0.18). Serum HDL-C was positively related to mother's education level(r=0.07) and negatively related to height(r=-0.12), weight(r=-0.09). Conclusively, the serum lipid levels of children living in Pusan is generally so high that the family and school must try to control the serum lipid levels.
Summary
The Seroprevalence and Related Factors of Helicobacter pylori Infection.
Yeung Wook Kim, Su Ill Lee, Byung Mann Cho, Young Sil Kim, Su Yong Kang, Oae Ri Cha, Don Kyoun Kim
Korean J Prev Med. 1996;29(3):669-678.
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Helicobacter pylori is now recognized as causative agent of chronic gastritis and peptic ulcer, and strongly associated with development of gastric carcinoma. With development of sensitive and specific serologic tests to identify individuals infected with Helicobacter pylori, the epidemiologic study of this diseases has been investigated. But it's transmission route is not established, yet. The purpose of this study is to measure the prevalence of Helicobacter pylori infection in healthy children and young adults and to evaluate related factors for Helicobacter pylori infection in Korea. The seroprevalence of Ig G antibodies to Helicobacter pylori was determined using a Enzyme Linked Immunosorbent Assay and we obtained the information, such as demographic characteristics, monthly household income, numbers of family members in the house, numbers of persons using same room, type of house, and type of drinking water through the questionnaire survey. The observed overall seropositivity rate was 25.7%. The rate is increased progressively from 5.8% in the age group 1~3 years to 44.4% in the age group 20~29 years(chi-square for trend, p<0.001). Especially, the rate increased steeply from 6.5% in the age group 4~6 years to 20.8% in the age group 7~9 years, and this suggested that elementary school age was the major acquisition time of Helicobacter pylori infection. In multivariate logistic regression model, age, numbers of family members in the house, and type of house was statistically significant variables for Helicobacter pylori infection. Each odds ratio(95% CI) were as follows; base to age group 1~9 years, age group 10~19 years 3.6(2.0~6.4), age group 20~29 years 7.3(4.1~13.1) and base to group of 1~3 family members, groups of 4~5 family members 2.1(1.1~4.0), group of 6 or more family members 2.7(1.3~5.4) and base to apartment, single and multihouse 1.9(1.1~3.5). Sex, monthly household income, numbers of persons using same room, and type of drinking water was not statistically significant for Helicobacter pylori infection.
Summary
A Study on the Factors related to the Cognitive Impairment of the Elderly in a Rural Area.
Kwang Wook Koh, Byung Mann Cho, Su lll Lee, Don Kyoun Kim, Bong Su Cho, Yeung Wook Kim, Young Sil Kim, Su Yong Kang
Korean J Prev Med. 1996;29(3):657-668.
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To investigate the factors which affecting the cognitive impairment of the 60 or more age group, the authors surveyed for the subjects in some area of Kyungnam Province. 201 studied subjects were tested for cognitive function with mini-mental state examination(MMSE). Information on demographic characteristics and life style has been collected through direct interview. The concentration of Al and Ca of subject's drinking water, which might be related with cognition, was measured by Inductively Coupled Argon Plasma Spectrometer. The main results were summarized as follows. 1. The prevalence rate of cognitive impairment was 18.4% in male and 45.2% in female and this sexual difference was statistically significant(p=0.03). And the uneducated or illiterated showed significantly high prevalence rate of cognitive impairment(p=0.02). 2. In stratified analysis by sex and education year, we can not see significant trend indicating the neurotoxic effects of aluminum and protective effects of calcium to the cognitive function(p>0.05). 3. The correlation between the concentration of aluminum in drinking water and the MMSE score in whole subjects showed weak negative relationship(r=-0.066). But there was no statistical significance(p=0.434).
Summary
A Study on Food Intake and Associated Factors of the Urban Poor Elderly.
Bong Soo Cho, Don Kyoun Kim, Su Ill Lee, Byung Mann Cho, Yeung Ook Kim, Kwang Wook Koh
Korean J Prev Med. 1995;28(1):59-72.
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This study was carried out to analyse the food intake and associated factors of the urban poor elderly by comparing poor district, Unbong rental apartment in Bonsong 2 dong with other areas in Pusan. 135 elderlies(men 36, women 99) in Unbong rental apartment 136 elderlies(men 45, women 91 ) in the other areas were investigated during the period of March to August in l994. The assumption that the study area represented poor district was satisfied because the age and sex distribution was not significantly different, and the income of the study area was significantly lower than that of the control area. The variables of hospitalized in previous 12 month, gastrointestinal problem, alcohol drinking, cigarette smoking did not differ significantly. But the variables of chronic disease, take medicine, perceive, vitamin supplement differed significantly between two groups. Therefore some factors associated with health state in the study area are worse than those of the control areas. At most of all variables, nutrients intake of the study area did not reach the recommended dietary allowances(RDA) for Koreans, and that nutrient intakes of the study area were significantly lower than those of the control area. The hypothesis of this study that nutrient status depends on economical status was proved. As for the score of nutritional knowledge, the study area was significantly lower than the control area. But as for the score of nutritional behavior, two areas were not significantly different. The latter is counter result of our hypothesis, owing to the effect of the confounding factors including education etc. As for the correlation of variables, not only economic status and educational level, but the score of nutritional knowledge effects strongly on nutrient status in the study area, the poor district. Therefore, adequate nutritional education to the elderly in the poor district should be considered.
Summary
Sociomedical Survey on the Occupational Low Back Injuries of the Some Workers in Pusan Area.
Jong Ook Park, Don Kyoun Kim, Su Ill Lee, Byung Mann Cho, Bong Soo Cho, Yeung Wook Kim
Korean J Prev Med. 1994;27(2):299-312.
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This survey was performed to obtain the basic information for the prevention and management of occupational low back injury(LBI). The subjects of this survey were 952 workers(male, 892;female, 60) who had taken occupational LBI in some industries of Pusan area from January 1 to December 31, 1991. Observation period was 2.6 years from the beginning to the end of medical treatment. The obtained results were summarized as follows; 1. The proportion of LBI workers was 15.9% of the workers who had taken any occupational injuries and 0.32% of all workers in this surveyed area. 2. 8.0% of the workers had taken LBI on the 1st day of employment and 55.2% of the workers were within one year, 91.4% of the workers were within 10 years according to cumulative frequency distribution. 3. Handling of heavy objects was the most common cause of LBI(32.0%) and fall down(26.9%) and slip down(16.3%) were the next in order. 4. The most common causes of both lumbar sprain and HNP were handling of heavy objects and that of lumbar fracture was fall down. 5. The mean duration for medical treatment of LBI workers was 143 days. 6. The total direct compensation cost for LBI workers was 6,736 million Won and the proportion of medical, resting, disability compensation costs were 25.0%, 37.0%, 38.0% respectively. 7. The percentages of retreated workers and disabled workers were 11.9%(113 persons) and 22.9%(218 persons) of total LBI workers respectively.
Summary
Assessment of renal function in silicosis with urinary N-acetyl-beta-D-glucosaminidase activity.
Hoo Rak Lee, Don Kyoun Kim, Su Ill Lee, Byung Mann Cho, Wha Jo Kim
Korean J Prev Med. 1993;26(1):49-64.
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AbstractAbstract PDF
To provide the basic for assessment of renal dysfunction related to silicosis, urinary N-acetyl-beta-D-glucosaminidase(NAG) activity known as a sensitive markers for early renal damage were measured in 58 silicosis patients, and control subjects of 40 pulmonary tuberculosis patients and 51 official workers. The results were summarized as follows. 1. The values of blood urea nitrogen and serum creatinine in all subjects were within reference limits. But the mean value of urinary NAG activity(7.25+/-7.31 U/g creatinine) was beyond reference value and more sensitive test than others. 2. The mean value of urinary NAG activity in silicosis group was 11.98+/-9.05 U/g creatinine and significantly higher than in tuberculosis and healthy group(p<0.01), but the mean values of NAG activity in tuberculosis and healthy group were not different(p>0.05). 3. The value of NAG activity in tuberculosis had a tendency to be increased according to severity of disease, but that was not significant(p>0.05). The value of NAG activity was increased significantly by use of nephrotoxic antituberculosis drugs(p<0.05). 4. The value of NAG activity in silicosis had a tendency to be increased according to the size of nodule, use of nephrotoxic antituberculosis drugs and shortness of onset duration, but the increase was not significant(p>0.05). 5. After excluding the users of nephrotoxic antituberculosis drugs, the mean values of NAG activity in healthy control and in tuberculosis control were same as 3.63 U/g creatinine and 3.60 U/g creatinine, respectively. But the mean value of NAG activity in silicosis group was remarkably increased as 10.90 U/g creatinine(p<0.01). As above results, even though there are no abnormal findings in screening renal function test, silicosis can be related with renal dysfunction. And it will be very useful to apply urinary NAG activity in health management of workers exposed to dust.
Summary
A Study of The Relationship between Alcohol Intake, Smoking, Relative Weight and Serum Lipids Level in Young Adult Male Workers.
Ji Ho Lee, Byung Mann Cho, Soo Ill Lee, Don Kyoun Kim
Korean J Prev Med. 1992;25(4):386-398.
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In order to study the relationship between life-style and serum lipids level in young adults, the author measured the concentration of serum total cholesterol (TC), triglyceride (TG) and high density lipoprotein cholesterol (HDL-C) and investigated age, relative weight, weekly alcohol intake and daily cigarette smoking through questionnaire in 310 male workers aged 20 to 39, in Ulsan area. The results obtained were as follows: 1. In the factors being able to influence serum lipids level there was negative correlation between age and alcohol intake, and the positive corrrelation between age and relative weight, alcohol intake and relative weight, alcohol intake and smoking with the strongest correlation between alcohol intake and smoking. 2. In univariate analysis, mean total cholesterol concentration were significantly different according to age, smoking and relative weight; mean triglyceride concentration were significantly different according to relative weight only; mean HDL-C concentration were significantly different according to alcohol intake alone. 3. In non-drinkers, HDL-C concentration of smokers were significantly lower than that of nonsmokers but triglyceride concentration of smokers were significant higher. And in drinkers, total cholesterol concentration of smokers was significantly higher than that of non-smokers. 4. In multiple regression analysis, significant independent variables were relative weight, age and smoking in the total cholesterol concentration, and relative weight, age and alcohol intake in the triglyceride concentration, and alcohol intake, relative weight and smoking in the HDL-C concentration. By these independent variables, total variation in each dependent variable was explained 7.9%, 17.6% and 7.4% respectively.
Summary
Seroprevalence of antibody to the hepatitis C virus in methamphetamine abusers.
Jin Kyoo Kim, Ji Ho Lee, Byung Mann Cho, Soo Il Lee
Korean J Prev Med. 1991;24(4):465-472.
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This study was designed to estimate the prevalence of hepatitis C virus(HCV) infection in drug abusers. The subjects were 141 inpatients who had been admitted to a general hospital with the symptoms and signs of methamphetamine intoxication. Seroprevalence of antibody to the hepatitis C virus(anti-HCV) was 60.3%,(85/141) and it was higher in the group with increased frequency and duration of drug abuse, but such a relationship was not found in the seroprevalence of hepatitis B surface antigen(HBsAg). These findings suggested the possibility of high prevalence of HCV infection in methamphetamine abusers, and the importance of repetitive percutaneous injection in the transmission of HCV infection.
Summary
Urinary Hippuric Acid Excretion in Toluene Exposed Workers.
Chae Un Lee, Hai Rim Shin, Byung Mann Cho, Deog Hwan Moon, Hae Sook Shon, Kyu Il Cho, Sung Chun Kim, Yong Wan Kim
Korean J Prev Med. 1988;21(2):374-379.
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AbstractAbstract PDF
In order to prepare the fundamental data for preventing the hazardous effects at toluene exposure in many kinds of industry, the authors determined the level of urinary hippuric acid on 592 toluene exposed women(exposed group) and 102 unexposed women(control group) in Pusan area, from April 1 to October 31, 1986. Hippuric acid was measured by high performance liquid chromatography. The results were summarized as follows; 1. The mean value of urinary hippuric acid concentration of the control group was 0.44+/-0.21g/l(0.11-0.89g/l). The distribution of urinary hippuric acid concentration of the control group was not fit to the normal distribution. 2. The mean value of urinary hippuric acid concentration of the exposed group was 1.56+/-0.95g/l(0.44-4.57g/l). The distribution of urinary hippuric acid concentration of control group was not fit to the normal distribution. 3. The urinary hippuric acid concentration by age group was not statistically significant in the control group, but in the exposed the urinary hippuric acid concentration was highest in women between 20-29 years old(1.71+/-0.95g/l) and was statistically significant(p<0.01). 4. The urinary hippuric acid concentration by duration of working hours was not statistically significant(p>0.1).
Summary

JPMPH : Journal of Preventive Medicine and Public Health