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Seung Hum Yu 37 Articles
Out-of-pocket Health Expenditures by Non-elderly and Elderly Persons in Korea.
Sung Gyeong Kim, Seung Hum Yu, Woong Sub Park, Woo Jin Chung
J Prev Med Public Health. 2005;38(4):408-414.
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OBJECTIVES
The purpose of this study was to determine the impact of the sociodemographic and health characteristics on the out-of-pocket health spending of the individuals aged 20 and older in Korea. METHODS: We used the data from the 2001 National Public Health and Nutrition Survey. The final sample size was 26, 154 persons. Multiple linear regression models were used according to the age groups, that is, one model was used for those people under the age of sixty-five and the other was used for those people aged sixty-five and older. In these analyses, the expenditures were transformed to a logarithmic scale to reduce the skewness of the results. RESULTS: Out-of-pocket health expenditures for those people under the age of 65 averaged 14, 800 won per month, whereas expenditures for those people aged 65 and older averaged 27, 200 won per month. In the regression analysis, the insurance type, resident area, self-reported health status, acute or chronic condition and bed-disability days were the statistically significant determinants for both age groups. Gender and age were statistically significant determinants only for the non-elderly. CONCLUSIONS: The findings from this study show that the mean out-of-pocket health expenditures varied according to the age groups and also several diverse characteristics. Thus, policymakers should consider the out-of-pocket health expenditure differential between the elderly and nonelderly persons. Improvement of the insurance coverage for the economically vulnerable subgroups that were identified in this study should be carefully considered. In addition, it is necessary to assess the impact of out-of-pocket spending on the peoples' health care utilization.
Summary
Medical Service Utilization and Trends among Korean Elderly in the Last One Year of Life.
Jee Jeon Yi, Ki Soon Park, Seung Hum Yu, Jeong In Kim, Jae Yong Park, Wang Kun Yoo, Sang Wook Yi
Korean J Prev Med. 2003;36(4):325-331.
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OBJECTIVES
To analyze medical service utilization and trends among the elderly in the last year of life. METHOD: The subjects of this study were people that had died at the age sixty-five and above between January 1st and June 30th 2000 The names of the deceased and their dates of death were collected from the data of the funeral-expenses-receivers of the National Health Insurance Corporation (NHIC). This data was merged with that of the individual medical expenses of the NHIC. RESULTS: In the first half of 2000, 84.2% of the funeral-expenses-receivers (53, 063) utilized medical services during the year prior to their death; 51.0% (27, 042) were female and 49.0% (26, 021) male. In the last twelve months of life, the medical fees, the number of days receiving medical services and the number of days receiving medicine were 3, 107, 935 Won, 47.88 and 153.21, respectively, for each person. As the age of the groups increased, the level of medical service utilization decreased; the change was more obvious in female group. The level of medical service utilization during the twelve months prior to death drastically increased around the time of death. CONCLUSIONS: This study, from an analysis of the level of medical service utilization prior to death, shows a concentrated volume of medical services during a certain time period prior to death.
Summary
Comparing Difference of Volume of Psychiatric Treatments between the Patient with Health Insurance and Those with Medical Assistance: For Inpatients of Korean Psychiatric Hospitals.
Dae Hee Lee, Eun Cheol Park, Chung Mo Nam, Sang Gyu Lee, Dong Han Lee, Seung Hum Yu
Korean J Prev Med. 2003;36(1):33-38.
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OBJECTIVES
To assess the difference in the volume of psychiatric treatments provided to health insurance inpatients, compared with those on medical assistance (the medical aid program) Korean psychiatric hospitals, and to determine factors which affect the volume of the services. METHODS: 21 psychiatrists, from 3 Korean psychiatric hospitals recorded the frequencies psychiatric treatments provided to inpatients in one week (February18-24, 2002). The records of 329 patients were analyzed through t-tests, and random effectmixed model analyses to define the difference between the two groups, and to find other factors affecting the volume of service. RESULTS: A significant difference in the volume of psychiatric treatments provided was observed between the health insurance and medical assistance groups. The variation in the volume of service between hospitals was prominent, and other factors (gender, agegroup, length of stay and mental disorder) were also found to be significant. The patients on medical assistance received only 70% of the psychiatric treatments of those on health insurance. CONCLUSIONS: More effort is required to improve the methods of payment to increase the level of fee scheduling for medical assistance. Further studies on the mechanisms causing these differences in the volume of service are required.
Summary
Dimensions of Consumer Ratings of a Hospital Outpatient Service Quality.
Ki Tae Moon, Seung Hum Yu, Woo Hyun Cho, Dong Kee Kim, Yunwhan Lee
Korean J Prev Med. 2000;33(4):495-504.
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OBJECTIVES
To examine various dimensions of consumer ratings of health care service with factor analysis and to find which factors influence the overall quality of health care service. METHODS: A cross-sectional study was conducted on outpatients of a general hospital located in Sungnam City. A self-administered questionnaire was used to assess the consumer? ratings of health care service received. The response rate was 92.8% with a total of 537 persons completing the questionnaire. Factor analysis was performed on 34 items evaluating the quality of health care service. Items were grouped into 5 dimensions as a result of factor analysis and the reliability and validity of influence on patient service assessment were evaluated for each dimension. RESULTS: The 5 dimensions were as follows ; 1) physician services, 2) non-physician services, 3) process 4) facilities, and 5) cleanliness. A positive correlation with the quality of health care service was found for the dimensions of non-physician services and process, while no significant correlation was found for the dimensions of physician services, facilities, and cleanliness. CONCLUSIONS: The result of this study may provide basic information for the development of future self-administered questionnaires of consumer ratings and for the evaluation of quality improvement activities in hospital outpatient settings.
Summary
A Case-control Study of Unexpected Readmission in a University Hospital.
Hyohn Joo Oh, Seung Hum Yu
Korean J Prev Med. 1999;32(3):289-296.
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OBJECTIVES
This study describes the risk factors affecting the unexpected readmission of 261 patients who were discharged from a university hospital in Seoul. METHODS: This case-control study reviewed medical records of inpatients who had been discharged from a hospital between 1 August 1995 and 31 October 1995 after the treatment for general diseases. The cases were 68 patients who were readmitted unexpectedly within 28 days of discharge from an index stay, and the controls were 193 patients who were discharged without readmission during the study period. RESULTS: Logistic regression analysis results were as follows; Patients who had no operation during their hospital stay were more likely to be readmitted unexpectedly than patients who had operation. Patients who had 1 or 2 parts of their body being involved in treatment were more likely to be readmitted unexpectedly than patients who hand more than 3 parts of their body being involved in treatment. Patients who had complications after surgery were more likely to be readmitted unexpectedly than patients who had no complications. Insufficient discharge planning caused unexpected readmissions. CONCLUSIONS: Discharge planning education should be extended to health care providers. And the assessment of discharge planning should be evaluated. Readmission is often necessary for the treatment of related problems originating from initial hospitalization, which causes cost problems. Unexpected readmission is preventable and the models for readmission can serve as a valuable clinical tool for high risk patients.
Summary
Meta-analysis of the Korean Literatures for Developing Clinical Practice Guidelines of Benign Prostatic hyperplasia.
Seung Hum Yu, Chun Bae Kim, Myung Geun Kang, Jae Mann Song
Korean J Prev Med. 1997;30(3):643-664.
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This study is to provide evidence-based recommendations for the most-effective treatments of benign prostatic hyperplasia based on patient preference or clinical need, and to meta-analyze the Korean literatures for the development of BPH treatment guidelines. For these analyses, extensive literature searches (208 articles), with priority given to the Korean Journal of Urology, were conducted from 1960 to August, 1996. Meta-analysis, like all statistical analysis, has two main functions: data summarization (qualitative meta-analysis) and smoothing or pattern recognition (quantitative meta-analysis). As well, critical reviews and syntheses with the mean and 90-percent confidence intervals for the likelihood were used to evaluate empirical evidence and significant outcomes of the BPH treatment literatures (106 articles). For this task, the Methodologic Panel for BPH Guidelines was composed of multidisciplinary experts in the field. The results of the study were summarized as follows: For all that watchful waiting is an appropriate treatment strategy for the majority of patients with prostatism, we couldn't find the Korean literatures which carried this article. The literatures on alpha-1-adrenergic receptor blockers provide no evidence to suggest that any one alpha blocker is more effective than another. The finasteride reduces the size of the prostate, on average, and leads to a small yet perceptible reduction in sysptoms. Of all treatment options, prostate surgery with transurethral resection of the prostate (TURP), transurethral incision of the prostate (TUIP), and so on, offers the best chance for symptom improvement. However, surgery also has the highest rates of significant complications. Therefore, surgery need not always be a treatment of last resort. Balloon dilation of the prostatic urethra is clearly less effective than surgery in relieving symptoms, but it is associated with fewer complications. Emerging technologies for treating BPH include lasers, coils, stents, thermal therapy and hyperthermia. Established technologies will also be reanalyzed as results of new trials are reported. Although this study has some limitations due to lacking for good quality literatures, it provides a cornerstone for our medical research. It represents the most current scientific knowledge regarding the clinical epidemiology including treatment of BPH. It will be revised and updated as needed.
Summary
The Development of Classification System of Medical Procedures in Korea.
Hyoung Wook Park, Myongsei Sohn, Han Joong Kim, Eun Cheol Park, Seung Hum Yu
Korean J Prev Med. 1996;29(4):877-897.
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In recent years, the Korean Medical Association has undertaken the feat of establishing the Korean Standard Terminology of Medical Procedures with the dedicated help of 32 medical academic societies. However, because the project is being conducted by several different circles, it has yet to see a clear system of classification. This thesis, therefore, proposes the three principles of scientific properties, usefulness and ideology as the basis for classification system and has developed the Classification System of Medical Procedures in Korea upon their foundation. The methodology and organization of this thesis as follows. First, by adopting scientific classification system of Feinstein(1988), an analysis of the classification systems of the medical procedures in the United States, Japan, Taiwan, Who Was carried out to reveal the framework and the basic principles in each system. Second, the direction of classification system has been constructed by applying the normative principle of medical field in order to show the future direction of the medical field and realize its ideology. Third, a finalized framework for the classification system will be presented as based on the direction of classification system. Of the three basis principles mentioned above, the analysis on the principles of usefulness was left out of this thesis due to the difficulty of establishing specific standards of analysis. The results of the study are as follows. The overall structure of the thesis is aimed at showing the 'Prevention-Therapy-Rehabilitation' quality of comprehensive health care and consists of six chapters; I. Prevention and Health Promotion. II. Evaluation and Management . III. Diagnostic Procedures. IV. Endoscopy. V. Therapeutic Procedures. VI. Rehabilitation. Chapter three Diagnostic Procedures is divided into four parts; Functional Diagnosis, Visual Diagnosis, Pathological Diagnosis, Biopsy and Sampling. Chapter five Therapeutic Procedures is divided into Psychiatry, Non-Invasive Therapy, Invasive Therapy, Anaesthesia and Radiation Oncology. Of these sub-divisions, Functional Diagnosis, Biopsy and Sampling, Endoscopy and Invasive Therapy employs the anatomical system of classification. On the other hand, Visual Diagnosis, Pathological Diagnosis, Anesthesia and Diagnostic Radiology, namely those divisions in which there is little or no overlapping in services with other divisions, used the classification system of its own division. The classification system introduced in this thesis can be further supplemented through the use of the cluster analysis by incorporating the advice and assistance of other specialists.
Summary
Distribution af active physicians and their working areas after 10 years of graduation.
Seung Hum Yu, Tae Yong Sohn, Hyohn Joo Oh
Korean J Prev Med. 1996;29(3):429-438.
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The geographical distribution of active physicians who graduated from medical schools before 1985 were studied. Those who had emigrated, hold non-medical jobs, are in the military service, or work as public health physicians and resident staff were excluded from the study. A total of 27,728 physicians were analyzed. Our studies have shown a relationship between the location of the medical schools from the which the physicians have graduated and the geographical regions in which they practice. A statistically significant number of physicians are working near the medical colleges from which they have graduated. That is, those who had graduated from medical schools located in the southern area of the country are presently working in the same region. This relationship was shown to be especially significant for older physicians and female doctors, who work around the area of the medical colleges from which they graduated.
Summary
Relationship between structural characteristics and hospital mortality rates on tertiary referral hospitals in Korea.
Tae Yong Sohn, Seung Hum Yu
Korean J Prev Med. 1996;29(2):279-294.
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This study was to evaluate hospital characteristics as composition of manpower and facilities to the death rate of patient; and to earmark the factors affecting the overall hospital mortality rates. The data utilized were derived from survey material conducted by the Korean Hospital Association on 32 tertiary referral hospitals in Korea between 1986 and 1994. The findings are: 1. Those hospitals having the most capacity per bed had little difference to the mortality rates than the others. 2. Those hospitals having the most daily patients per specialist had significantly higher mortality rates than the others, but the number of daily patients per nurse had little effect on the mortality rates. 3. Those hospitals which had a relatively sufficient number of quality assurance activities revealed a lower mortality, and particularly in case where such effort was directed to the clinicians, the outcome was remarkable. we concluded that the major factor affecting the hospital mortality rates seems to be the number of specialists per number of beds, the degree of quality assurance assessment of the clinicians, the quality assurance activities of each hospital as a whole, and the number of daily patient per specialist. According to the findings of this study, the composition and quality of specialist and adequate quality assurance activities seemed to be the essential for the improvement of hospital care. Therefore, in this regard the proper implementation of policy and support is highly recommended. Due to lack of available research material, the personal characteristics of specialists haven't been considered in this study However, this longitudinal observation of 32 tertiary referral hospitals over a nine year period has significant merit alone.
Summary
A Comparison of Laparoscopic Cholecystectomy with Open Cholecystectomy in a Korean Hospital.
Eun Mee Lee, Seung Hum Yu, Myong Sei Sohn, Suk Il Kim
Korean J Prev Med. 1995;28(2):325-333.
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Laparoscopic cholecystectomy was introduced into Korea in 1990 and has been rapidly replacing open cholecystectomy when the indications were met. In this study a medical utilization and technology was assessed on the selected hospitalized patients with cholelithiasis who underwent open or laparoscopic cholecystectomy from April 1, 1991 to March 31, 1994. The results are as follows. Despite the low reimbursement rate by the health insurance, the number of laparoscopic cases have been steadily increased. The post-operative days before health insurance coverage were significantly shortened from 8.4 days to 4.6 days. The preoperative days before health insurance coverage were significantly shorted from 8.4 days to 4.0 days. The total length-of-stays in the hospital were also significantly shortened from 15.2 days to 10.7 and 9.8 days in laparoscopic cholecystectomy. The laparoscopic cholecystectomy showed low expenses in all aspects expect the average hospital charges per day. For the hospital to have cost containment, it is more effective if length-of-stay is shorter because of high daily inpatient hospital charge. The laparoscopic cholecystectomy also showed shortened anesthesia time and operation time compared with open cholecystectomy that were statistically significant. The mean anesthesia and operation time for open cholecystectomy were 113.2 and 90.2 minutes but those of laparoscopic cholecystectomy were 105.7 and 68.6 minutes. According to this study the laparoscopic cholecystectomy has reduced the medical expenditure and we recommend this procedure over open cholecystectomy. The further discussion on the different morbidity rate between two types of procedure is essential in providing quality medical care, and to educate specialist.
Summary
Changes in Medical Practice Pattern before and after Covering Intraocular Lens in the Health Insurance.
No Ah Choi, Seung Hum Yu, Hey Young Min, Eun Wook Chung
Korean J Prev Med. 1994;27(4):807-814.
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This study is to find out changes in medical practice at a university hospital before and after covering intraocular lens (IOL) from the health insurance benefit. The coverage started on March 1, 1993 and a total of 596 cases who were discharged from July 1 to December 31, 1992 and 580 cases who were discharged from July 1 to December 31, 1993 were analyzed. Since the standard reimbursement scheme was changed from March 1, 1993, the charges for 1992 were transformed into 1993 scheme. Major findings are as follows: Average length of stay was statistically significantly decreased from 8.24 days in 1992 to 6 86 days in 1993. Charges except IOL has been statistically significantly decreased from 501,000 won in 1992 to 444,000 won in 1993. Charges for drugs and injection have been reduced. However, charge per day for them was not much different. This is due to decrease in length of stay. Charges for laboratory tests and radiologic examination were quite the same. charges which are not covered by the insurance remained the same. The revenue of the hospital was reduced as expected. However, the hospital reduced the length of stay and increase the turnover rate in order to compensate the potential loss of revenue due to the difference of reimbursement between the out-of-pocket expense and the insurance coverage. By introducing the IOL benefit in the insurance, the insured pays less, hospital generates more revenue through shortening the hospital stay, and the total medical care cost becomes less nationwidely.
Summary
An Analysis of Determinants of Elderly Medical Costs Inflation Using Deterministic Model.
Seung Hum Yu, Myong Sei Sohn, Eun Cheol Park
Korean J Prev Med. 1994;27(1):135-144.
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The purpose of this study compares determinants of eldery medical cost inflation with those of other age groups by analysing aggregated data with a deterministic model. The deterministic model of per capita medical cost inflation consists of increases in price, intensity of services, and medical utilization. We used a time series data (1985-1991) from National Medical Insurance and analyzed by age groups. In total population, the average increase rates of inpatient and outpatient medical costs were respectively 9.5% and 8.8% during 6 years and the major cause of inflation was the increase in service intensity in both of inpatient and outpatient cases. But in the population of 65 years old and over, the average increase rates of inpatient and outpatient medical costs were respectively 13.8% and 14.8% and the major cause of inflation was the increase in per-capita medical utilization in both of inpatient and outpatient cases. Also, the increase in service intensity of 65 years old and over was the highest of other age groups. This pattern was similar during study periods. we concluded that the level of medical cost inflation and the determinants in elderly was the highest-especially in per capita medical utilization, therefore, the inflation of medical costs in elderly will be higher than other age groups for the further in Korea.
Summary
Geographical distribution of physician manpower by specialty and care level.
Seung Hum Yu, Sang Hyuk Jung, Byung Yool Cheon, Tae Yong Shn, Hyohn Joo Oh
Korean J Prev Med. 1993;26(4):661-671.
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AbstractAbstract PDF
In order to compare the geographical distribution of physician by level of medical care and specialty, a log linear model was applied to the annual registration data of the Korean Medical Association as of the end of December, 1991 which was supplemented from related institutions and adjusted with relevant sources. Those physicians in primary and secondary care institutions were not statistically significantly unevenly distributed by province-level catchment area. There were some differences in physician distribution among big cities, medium and small-sized cities, and counties; however, those physicians for primary care level were equitably distributed between cities and counties. Specialties for secondary care physicians were less evenly distributed in county areas than in city areas, and generalists are distributed more evenly in cities and counties than in big cities. There is a certain limitation due to underregistration in the annual physician registration to the Korean Medical Association; however, the geographical distribution of physicians has been improved quantitatively. It is strongly suggested that specialties and the level of medical care should be considered for further physician manpower studies.
Summary
The Projection of Medical Care Expenditure in View of Population Age Change.
Seung Hum Yu, Sang Hyuk Jung, Jeung Mo Nam, Hyohn Joo Oh
Korean J Prev Med. 1992;25(3):303-311.
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It is very important to estimate the future medical care expenditure, because medical care expenditure escalation is a big problem not only in the health industry but also in the Korean economy today. This study was designed to project the medical care expenditure in view of population age change. The data of this study were the population projection data based on National Census Data (1990) of the National Statistical Office and the Statistical Reports of the Korea Medical Insurance Corporation. The future medical care expenditure was eatimated by the regression model and the optional simulation model. The significant results are as follows; 1. The future medical care expenditure will be 3,963 billion Won in the year 2000, 4,483 billion Won in 2010, and 4,826 billion Won in 2020, based on the 1990 market price considering only the population age change. 2. The proportion of the total medical care expenditure in the elderly over 65 will be 10. 4% in 2000, 13.5% in 2010, and 16.9% in 2020. 3. The future medical care expenditure will be 4,306 billion Won in the year 2000, 5,1101 billion Won in 2010, and 5, 699 billion Won in 2020 based on the 1990 market price considering the age structure change and the change of the case-cost estimated by the regression model. 4. When we consider the age-structure change and inflation compared with the preceding year, the future medical care expenditurein 2020 will be 21 trillion Won based on a 5% inflation rate, 42 trillion Won based on a 7.5% inflation rate, and 84 trillion Won based on a 10% inflation rate. Consideration of the aged (65 years old and over)will be essential to understand the acute increase of medical care expenditure due to changes in age structure of the population. Therefore, alternative policies and programs for the caring of the aged should be further studied.
Summary
Factors Affecting Selection of Delivery Facilities by Pregnant Women.
Choong Wan Lee, Seung Hum Yu, Hee Choul Oh
Korean J Prev Med. 1990;23(4):436-450.
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This study was designed to investigate the major factors affecting selection of delivery facilities by pregnant women. Five hundred women hospitalized at 23 Seoul-area delivery facilities, such as university hospitals, general hospitals, hospitals, and clinics were selected and given questionnaires from April 24 to May 7, 1990. A total of 350 questionnaires were collected and analysed for the study. The results are as follows; 1. In general, variables which significantly affected the choice of delivery facilities included the age of women, their educational level, the educational level of their husbands, monthly average incomes and residential areas. 2. In analyzing the obstetrical characteristics of the women, those variables significantly affecting the choice of delivery facilities were the gestational period, the facilities for prenatal care, the frequency of prenatal care, the type of delivery, the frequency of miscarriage, previous delivery experiences and the awareness on prenatal care. 3. In comparing the motivation factors for selecting the delivery facilities, all the factors except convenience and need for hospitalization differed significantly among delivery facilities. 4. The factor analysis was assessed for twenty possible factors motivating the choice of delivery facilities. Six factors including personal service, scale of the facility, reputation, urgency, convenience, and experience were noted explaining by 57.7%. 5. In the discriminant analysis used to clarify the major factors affecting the selection of delivery facilities, the 16 significant variables were regarded as independent variables, and the type of delivery facilities was considered a dependent variable. The stepwise method was applied to the analysis. Detected discriminant variables were the facilities for prenatal care, scale factor, personal service factor, urgency factor, convenience factor, reputation factor, experience factor, gestational period, types of delivery, frequency of miscarriage, age and income. These 12 discriminant variables were tested, with reference to discriminant prediction, on their importance in the choice of the delivery facility, by the discriminant functional formula. The test showed a hit-rate of 67.7%. The results suggest that general characteristics, obstetrical characteristics, and motivations for selecting the delivery facilities differ significantly according to the types of the delivery facilities. This study implies that all types of delivery facilities should attempt to acommodate characteristics and motivations of pregnant women. The facilities should be prepared to increase their patients satisfaction with required medical conditions by improving service and responding to the pregnant women's preferences.
Summary
Social Factors in Recruiting Physicians and Dentists.
Seung Hum Yu, Chong Yon Park
Korean J Prev Med. 1990;23(4):428-435.
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This study was designed to investigate whether recruitment of physicians and dentists has been restricted to a social network, such as familial or kinship groups. The data was collected through a self-administered questionnaire survey distributed to a sampling of general physicians, specialists (internists, surgeons, other specialists), and dentists in August 1990. The major findings are as follows: 1) Total number of respondents was 405; of these, general physicians made up 48.9%, internists 10.4%, surgeons 15.8%, other specialists 4.9%, and dentists 20.0%. 2) 38.5% of the respondents had physicians or dentists in their immediate family or were related in some way to one. Those from urban areas, whose parents were highly educated, and whose father was a professional had more physicians or dentists in their family or kinship. 3) Parents of 7.1% of the respondents, brothers or sisters of 10.1%, grand parents of 1.7%, uncles or aunts of 7.9%, and cousins of 22.0% were physicians or dentists. 4) The majority of physicians or dentists in familial or kinship network specialized in surgery, 32.3%, followed by internal medicine ; current worksites were noted as clinics by 30.8%, followed by general hospital, university hospital, and so on. The respondent's major discipline tended to follow familial or kinship example. Consequently, it was concluded that physicians and dentists have been recruited within restricted familial or kinship network.
Summary
The study for recent changes of disease-mix in health insurance data.
Seung Hum Yu, Sang Hyuk Jung
Korean J Prev Med. 1990;23(3):345-357.
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Accumulated data on medical care utilization among the insured in Korea Medical Insurance Corporation can explain the health status of the population. The purpose of this study was to analyze a change of the disease-mix and utilization pattern by controlling the size of the population enrollment. Major findings of the study are as follows: 1. The changes of inpatient disease-mix a. Utilization rate was 139.2% in 1988 against 1980. b. Disease groups higher than the average utilization rate included neoplasms, endocrine, nutritional and metabolic diseases and immunity disorders, mental disorders etc. Meanwhile, disease groups seen less often were infections and parasistic diseases, diseases of bloodforming, diseases of the digestive system etc. c. Utilization rate was up 106.3% in 1988 compared to 1985, and diseases above that average level were ill-defined intestinal infections, chronic liver disease and cirrhosis, diabetes mellitus, essential hypertension, etc. d. The disease-mix by institution in 1988 compared to 1985 shows that chronic disorders rank high in general hospitals whereas opthalmologic, obstetric, and orthopedic diseases rank high in private clinics. 2. The changes of outpatient disease-mix a. Utilization rate was up 175.2% in 1988 compared to 1980. b. Disease groups higher than the average utilization rate included neoplasms, endocrine, nutritional and metabolic diseases and immunity disorders, mental disorders etc. And disease groups seen less often were infections and parasistic diseases, diseases of the respiratory system, diseases of the genitourinary system. etc. c. Utilization rate was up 104.0% in 1988 compared to 1985, and diseases above that average level were gastric ulcer, diseases of hard tissues of teeth, etc. And diseases seen below that average level were acute nasopharyngitis (common cold), acute upper respiratory infections of multiple or unspecified sites, etc. It was concluded that medical care utilization level was increased, and that, from 1980 to 1988, disease-mix shifted to the chronic disorders. Chronic disorders accounted for more medical care utilization in general hospitals.
Summary
Analysis of charges per case by hospital characteristics: In regard to acute appendicitis and NSVD.
Sang Hyuk Jung, Seung Hum Yu, Han Joong Kim
Korean J Prev Med. 1990;23(2):216-223.
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To identify the factors influencing the charges per case of acute appendicitis and normal spontaneous vaginal delivery (NSVD), the personal data-base files and hospital-characteristics-reporting data files of Korea Medical Insurance Corporation were analyzed. One hundred and twenty-nine institutions were selected. The results of this study were as follows: 1. The differences of charges per case with respect to hospital ownership, location, and equipment levels were statistically significant. 2. The results of multiple regression analysis revealed that bed capacity was the most significant variable in both diseases. 3. Ownership was significant variable in acute appendicitis. In NSVD, ownership and hospital equipment level were statistically significant. In conclusion, bed capacity was statistically the most significant variable in the analysis of charges per case. And we thought that the results of this study would influence the policy of the hospital bed supply.
Summary
A Study on the Efficient Management of Long-term Inpatient Flow in a General Hospital.
Chun Bae Kim, Young Moon Chae, Seung Hum Yu, Hee Chul Oh
Korean J Prev Med. 1990;23(1):11-21.
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AbstractAbstract PDF
This study refers to the problem of long-term inpatient flow in a general hospital. In this study, a queueing simulation model was developed for the two departments in the hospital with a homogenous case mix and relatively many long-term inpatients in order to increase the tumover rate and hospital charges. Before the simulation run, the model was verified by the Kolmogorov-Smirmov test. The following results were generated by three alternative models of the special bed policies. 1. Alternative I: When long term inpatients were admitted to the wards belonging to departments A and B without transfer to other departments and special beds, the average turn-over rate decreased by 2-4% and the average hospital charges decreased by 70 million won. 2. Alternative II: When long-term inpatients were transferred to department C but the transfer of wards was determined by department C in order of clinical need, the average turnover rate increased by 4-13% but the average hospital charges decreased by 30 million won. This result was not greatly different from the present state. 3. Alternative III: When long-term inpatients were transferred to the special wards and department C simultaneously, the increase in the average turnover rate and hospital charges was equivalent to the increase of two beds in the special wards. When the special wards were allocated 16 beds, the average turnover rate of departments A and B increased by about 55% and 20% respectively. Also, the hospital charges increased by about 0.44 billion won. As a result, trasfer to department C and the use of 16 beds in the special wards for long-term inpatients of departments A and B is expected to maximize the hospital revenue. However, as the above special bed policy can not increase the turnover rate above 60%, there is a need for a more comprehensive policy to further increase the rate. The development of an elaborate model should include the number of long-term inpatients in all clinical departments, the special wards system or an increase of hospital beds to handle admission needs, and the resources of the hospital by department. When the alternative are evaluated, a cost-benefit analysis in addition to the turnover rate and the hospital charges should be considered.
Summary
Cost analysis of hypertension screening program.
Eun Cheol Park, Seung Hum Yu
Korean J Prev Med. 1989;22(3):380-388.
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AbstractAbstract PDF
To evaluate the costs the hypertension screening program of the Korea Medical Insurance Corporation, the records of the screening examinations were used. The sample size was 49,983 of the 906,554 people insured by the Corporation and was obtained by two-stage stratification random sampling. The alternatives for efficiency of the screening program, which were divided into three categories: modification of the screening test package, application of other hypertension diagnostic criteria, and selective approach of tested groups by age, were evaluated according to the cost per patient detected. The results of this study were as follows: In the hypertension screening system, the cost per patient detected was Won 30,833. The most nonsensitive test for hypertension detection was ophthalmoscopy, which was examine during the second stage of screening. If the ophthalmoscope examination was excluded, only one person was not detected, which was 0.2% of detected persons, and the cost per patient detected decreased to Won 28,098. The most efficient modification of the screening test package was measurement of blood pressure through the first and second stages of screening. The cost per patient detected by this modification was Won 24,408. The application of other diagnostic criteria, which were more restricted criteria, increased the cost per patient detected by 3.7%-6.7%. The cost per patient detected were Won 170,582 for persons less than 39 years old, Won 20,032 for persons 40 to 59 years old, and Won 8,675 for persons 60 years old and over. In conclusion, the best alternative suggested with respect to efficiency and practical application excluded the ophthalmoscope examination of second stage screening and restricted the target population to persons greater than 40 years old. The application of this alternative decreased 54.9% of the screening costs and the cost per patient detected was Won 15,222. This study was limited in that measurement of effectiveness was not of the ultimate goal of screening, which is decreasing morbidity and mortality, but was of disease detection as the short-term objective.
Summary
Cost-benefit Analysis of Health Screening Test for the Insured.
Seung Hum Yu, Myongsei Sohn, Woo Hyung Cho, Eun Cheol Park, Young Doo Lee, Kyu Sik Lee, Ki Hong Chun
Korean J Prev Med. 1989;22(2):248-258.
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AbstractAbstract PDF
As a result of cost-benefit analysis by making a macroscopic approach to the health screening projects conducted 4 times since 1980 for the insured people of the Korea Medical Insurance Corporation, the following conclusions were reached. 1. The direct costs put into the health screening project, and the time costs which were paid by examines or calculated in terms of social costs have been estimated. The results is that the lowest estimation was 10,337 million won and the highest 15,141 million won when a minimum of 1.5 hours of time spent and a maximum 4 hours were applied. 2. In terms of the psychiatric benefits, the lowest estimation was 5,341 million won while the highest was 5,585 million won. 3. In terms of the benefits for each kind of diseases, the lowest estimation of 37,188 million won and highest estimation of 74,383 million won have been calculated for the liver diseases. And for the cardiovascular diseases, the minimum estimation was 14,475 million won while the maximum was 20,532 million won. In case of pulmonary tuberculosis, with external effect benefits being included, the estimation ranged from the minimum of 1,649 million won to the maximum of 1,832 million won. And the estimation of benefits for diabetes mellitus and renal diseases ranged from 89 million won to 92 million won and from 4,567 million won respectively. 4. In comparing costs and benefits, as a results of comparing each highest and lowest estimation, a range of minimum 46,708 million won and maximum 98,071 million won of benefits has been gained.
Summary
Comparison and Analysis of the Results of Preventive Medicine Sutdy in a Medical College.
Seung Hum Yu, Jaehoon Roh, Sang Hyuk Jung, Chung Mo Nam
Korean J Prev Med. 1989;22(2):242-247.
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AbstractAbstract PDF
The purpose of this study was to find a better evaluation method by comparison and analysis of the subdivision-score for preventive medicine with other subjects and total score. Among the 475 students who were second grade in 1983, 1984 and 1985, we analyzed the scores for all subjects at Yonsei University College of Medicine obtained by 443 students, with the exception of 32 students who had a temporary absence from school, failed or had been expelled. And we analyzed the score for preventive medicine of 162 students who were second grade in 1987 and 179 students who were second grade in 1988. Statistical analysis of the above was done using the correlation analysis, chi-square test and discriminating index. The results were as follows: 1. The correlations of the subdivision of preventive medicine in 1984, 1987 and 1988 were statistical significantly high(r=0.36-0.56). 2. The grades obtained for preventive medicine and for other subjects except pediatrics (clerkship) were not independent. 3. The discriminating indices that determined whether or not a pertinent evaluation was made were 0.42 in 1983, 0.52 in 1984 and 0.54 n 1985. These results were classified as excellent. These results suggest that the score of a subject is determined not by the characteristics of the subject, but by the amount of personal study.
Summary
An Evaluation of a Patient Referral System using Intervention Analysis.
Woo Hyun Cho, Hae Jong Lee, Myongsei Sohn, Chung Mo Nam, Seung Hum Yu
Korean J Prev Med. 1989;22(2):236-241.
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AbstractAbstract PDF
The purpose of this study was to introduce the methodology of intervention analysis with time series data and to investigate the influence of the patient referral system on medical care utilization in Kangwha county. The data were obtained at the Kangwha Medical Insurance Society and we analysed the material based on the outpatient care fee. The results were as follows: 1. The average outpatient care utilization in the hospital decreased by 41.7% due to the patient referral system. 2. The utilization of the health institution increased by 278.8 persons per month due to the patient referral system. 3. The patient referral system did not influence the total outpatient care utilization. The methodology of intervention analysis, which detected the effect of intervention, will be helpful to the study of public health area.
Summary
A Study of Attitudes to Changed Health Care Delivery System in a Community.
Seung Hum Yu, Myongsei Sohn, Jong Yeon Park
Korean J Prev Med. 1989;22(1):162-168.
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AbstractAbstract PDF
This study was conducted to analyse attitudes to a new health care system in a rural community. The specific purpose of this thesis was to classify attitudes to the patient referral system in Kangwha county, and to identify factors affecting the attitudes. Sampling was done by a multi-stage stratified cluster sampling method from the population. The data were collected in Kangwha county through a structured interview survey for two weeks in June, 1987. Attitudes to the patient referral system were classified into four types based upon answers to questions about awareness of the system, the recognition for the necessity of the system, and opinions on the improvement of the system. The four types of attitudes were active acceptance(10.2%), partial acceptance(27.2%), refusal(35.8%), and indifference(26.7%). The respondent's age, educational level, age of head of household, medical insurance fee, the number of ill family members, and the percentage of medical utilization by the family were the variables which affected the attitudes. The medical insurance fee, respondent's age, age of head of household, and the percentage of medical utilization by the family were the statistically significant discriminant factors of the four types of attitudes.
Summary
Analysis of Sports Medical Care Utilization during the 24th Seoul Olympic Games.
Seung Hum Yu, Myongsei Sohn, Young Doo Lee, Eun Cheol Park, Chun Bae Kim
Korean J Prev Med. 1989;22(1):136-145.
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AbstractAbstract PDF
This study made a descriptive analysis of the cumulative amount and rate of sports medical care utilization during the 24th Seoul Olympic Games by the participating athletes, officials, etc. The sports medical care utilization was a component of the total medical care use and was basically caused by the prevention and treatment of sports injuries. The analytic data were derived from the Olympic Health Management Information System (OHMIS) of the SLOOC and the Korea Athlete Trainer Association(KATA). These were analyzed according to the., quantity of physician visits and the utilization rate, which was the amount of utilization divided by the total number of participating persons. The results were as follows: Firstly, the sports medical care utilization by the persons participating in the Seoul Olympics amounted to 17.9 % of the total medical care utilization. The venue medical services utilization accounted for 54.7 % of the total physician visits, which was larger than the village medical center's utilization. The number of physician visits per hundred persons during the 2 week period in the venue clinic was 3.03 and that of the village medical center was 2.51, therefore, the total was 5.54. Secondly, athletes accounted for 82.3% and officials 12.2% in the sports medical care utilization by participants. These results were because athletes, who were directly related to the games, called extremely often on the physicians. The utilization rate of sports medical care by athletes was 34.29. Thirdly, the sports medical demand according to type of therapy could be ranked from high to low in the following order: sports massage, thermal therapy, and electrical stimulation treatment, etc. The department of physical therapy in the village medical center was used a great deal. Fourthly, the trend of daily sports medical care utilization by the athletes showed a bell shape centering around the opening day of the Seoul Olympic Games. The utilization rate of athletes was 2.3; however, that of officials was 0.6. Lastly, the sports medical demand was calculated according to the continents, and Central America, Africa and Middle-East Asia proved to have a higher rate of sports medical care utilization than the more powerful and industrialized continent or regions.
Summary
Periodic Health Examination.
Seung Hum Yu, Jae Hoon Roh, Hae Jong Lee, Sang Hyuk Jung
Korean J Prev Med. 1989;22(1):45-50.
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AbstractAbstract PDF
The purpose of this study was to select the manageable diseases which are prevalent in Korea for periodic health examinations and to evaluate the sensitivity and specificity of periodic health examination in detecting these diseases. The data was derived from reimbursement data of the Korea Medical Insurance Corporation over a two year period (April 15, 1986 to April 14, 1988) and interviews with Yonsei Medical School professors. This study demonstrated that: 1. The manageable diseases which were selected for periodic health examinations are pulmonary tuberculosis, viral hepatitis, diabetes mellitus, syphilis groups, essential hypertension, renal disease groups, and iron deficiency anemia. 2. The sensitivity of the health screening for each disease was as follows: pulmonary tuberculosis 51.5%, viral hepatitis 60.3%, diabetes mellitus 64.7%, syphilis groups 63.3%, essential hypertension 49.9%, renal disease groups 44.0%, and iron deficiency anemia 80.9%. We conclude that peiodic health esaminations should focus on the manageable diseases that we have defined. The number of items in periodic health screening tests and hospital quality control should be increased for the diseases with a demonstrated low sensitivity.
Summary
A Comparative Study of Two Survey Methods for Health Services Research Modified Self-administered Questionnaire vs. Interview Survey.
Seung Hum Yu, Yong Ho Lee, Woo Hyun Cho, Chong Yon Park
Korean J Prev Med. 1988;21(2):431-441.
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AbstractAbstract PDF
The purpose of this study was to compare the difference of two survey methods for health services research. Data were collected by means of two types of household survey conducted from March 11 to September 19, 1985. A probability sample of 30,613 persons was taken from 180 Enumerated Districts designated by the Economic Planning Board. The sample was divided into two groups systematically. One group was surveyed by the self-administered questionnaire and the other group was interviewed. Response rates were 81.4% and 90.6% respectively. The data were analyzed by the ratio of the results of the self-administered survey to those of the interview survey. No difference was observed in sex, age, residence, or occupation between the two groups. However the respondents' characteristics were statistically different between the two groups. The major findings of this study are as follows : 1. The morbidity rate was 142.5 per 1,000 persons during the two week period by the self-administered questionnaire survey and 74.3 per 1,000 persons with the interview survey method. The ratio of the morbidity rate by the self-administered questionnaire to that by the interview was 1.92, and the difference between the two rates were due to the personal characteristics. 2. The out-patient utilization rate was 10.2 visits per person per year by the self-administered questionnaire survey and 5.4 by the interview survey, and the ratio was 1.89; the admission rate was 3.2 times per 100 persons per year by the self-administered questionnaire survey and 1.9 times by the interview survey, and the ratio was 1.68. Differences due to the sociodemographic characteristics were greater in the out-patient utilization rates than in the admission rates. 3. Percentages of effective medical care demand were 90.2% in the self-administered survey and 92.3% in the interview survey; the ratio was 0.98 which was less than that of the morbidity rate and medical care utilization. But, differences of effective medical care demand occurred in persons with no occupation, and aged or low educated respondents. 4. Respiratory illness had the highest frequency in the two survey methods. But there was a slight difference between the two survey methods in morbidity composition. 5. It was concluded that data collected by the interview survey were inclined to be underestimated and this problem can be corrected by a modified self-administered survey.
Summary
Changing Patterns of Ambulatory Care Utilization of a Rural Community in a Regional Medical Insurance Scheme.
Seung Hum Yu, Woo Hyun Cho, Myongsei Sohn, Chong Yon Park
Korean J Prev Med. 1988;21(2):419-430.
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AbstractAbstract PDF
This study was performed in a rural community, Kanghwa county which was introduced to a regional medical insurance pilot program in 1982. The purposes of this study were, firstly, to observe the changes in ambulatory care utilization in the three years 1982, 1983 and 1987 ; secondly, to analyse factors which convert perceived medical care needs to effective medical care demand. During the three periods, a serial interview survey was performed to determine the changes in medical utilization before and after the regional medical insurance program implementation. The number of subjects was 3,356 persons in the year 1982, 3,705 in 1983 and 2,745 in 1987. The results of the study were as follows : 1. Total ambulatory care utilization rates per 100 persons during a 2-week period were 23.6 in the year 1982, 21.8 in 1983, and 29.3 in 1987 ; and physician visit rates were 6.1 in 1982, 11.7 in 1983, and 14.9 in 1987. Thus, compared to the total utilization rate there was a definite increase in physician visit, and during the study periods there was a decrease in drug stores visits whereas an increase in hospital or clinic visits was noticed. 2. The rates of effective demand for medical care need were 70.7% in 1982, 70.5% in 1983 and 75.9% in 1987 ; and the rates of patients who visited physicians were 20.2% in 1982, 42.8% in 1983 and 35.6% in 1987. Thus, physician visits increased sharply by introducing the medical insurance program, but after the latent medical care demands were fulfilled, there was a slight decrease in the physician visits. 3. The number of acute symptoms and the number of chronic symptoms were common determinants of total ambulatory care utilization and physician visits. Besides the medical care need factors, age in 1982, sex and accessibility in 1983, and accessibility in 1987 were statistically significant determinants of the total utilization ; sex and accessibility in 1983, and education in 1987 were also statistically significant determinants of the physician visit. 4. For persons with perceived acute symptoms during the 2-week periods, accessibility in total utilization and age in physician visits were common discriminating factors of ambulatory care utilization in the three years, and education and income were also statistically significant variables For persons with perceived chronic symptoms, occupation and income were statistically significant discriminating variables commonly observed in total utilization and physician visits.
Summary
Projection of Physician Manpower Supply in Korea.
Seung Hum Yu, Woo Hyun Cho, Yong Ho Lee, Byung Yool Cheon
Korean J Prev Med. 1988;21(1):61-69.
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AbstractAbstract PDF
In this study, the number of physicians presently living in Korea thoroughly estimated by several means and, on this bases, their productivity and level of supply were estimated. The results were as follows : First, the number of physicians who did not notify the Korea Medical Association in May 1987 were 10,110, including 4,093 emigrant physicians(40.5%), 861 military medical officers, 745 public health doctors, and 107 decreased physicians. A total of 1,330 physicians could not be identified by any effort. Second, among the 34,897 registered physicians as of May 1987, 29,933(85.8%) were residing in Korea, 4,115 physicians(11.8%) had emigrated to other countries, and 849 physicians(2.4%) were decreased. Practicing physicians defined as those in Korea who were not retired, serving in the military, or completing residencies or internships, comprised 78.6%(27,414 physicians) of the total number of registered physicians. Third, it is estimated that in the year 2000 the number of registered physicians, physicians residing in Korea, and practicing physician will be 75,040, 64,038 and 57,655, respectively and these are increases of 115.0%, 113,9%, and 110.3%, respectively, compared to 1987. Fourth, the population physician ratio will be 759 to one physician in the year 2000. Fifth, the productivity of physicians, as calculated by relative values defining the productivity of 35 to 44 year-old male physicians as 10, will increase 110.7% in the year 2000 compare to that of 1987, and this increment is almost the same level as that of physicians supply. From the results of the present analysis of physicians manpower and supply projection, it can be recognized that the development of a regular notification system is necessary in order to identify precisely the number of physicians. Also a policy a physician supply is essential in order to adjust in advance the number of physicians, otherwise there will be surplus to the medical demand.
Summary
Health Care Utilization and Its Determinants among Island Inhabitants.
Seung Hum Yu, Woo Hyun Cho, Chong Yon Park, Myung Keun Lee
Korean J Prev Med. 1987;20(2):287-300.
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AbstractAbstract PDF
Island regions suffer from a shortage of health care in part because they are less developed, they cover a widespread area relative to the population, and due to transportation barriers. The purpose of this study was to assess the level of illness and the magnitude of medical care utilization, and to investigate the determinants of utilization in these area. The data were collected by means of a household survey conducted from February 16 to 25, 1987 on 5 islands which were selected in consideration of the size of the population, the distance from the main land, and the distribution of health care facilities. The household response rate was 89.1% (491 of 551 households), and 1971 persons were surveyed. The major findings of this study are as follows: 1) The morbidity rate of the island inhabitants was 27.7% during the two weeks, and 25.5 chronic illnesses and 9.1 acute illnesses per 100 persons, were noted. Differences in the magnitude of illness were statistically significant by sex, age, education, and family size. 2) The magnitude of total ambulatory care utilization was 16.8 visits per 100 persons during the two weeks, which was less than that of other regions; and differences in the magnitude of total ambulatory care were statistically significant by sex, age, education, occupation, and family size. 3) Unmet needs were classified as 56.0% in chronic illnesses and 19.6% in acute illnesses; and differences in unmet needs were statistically significant by sex, age, education, occupation, income, and family size. 4) Statistically significant determinants in medical care utilization included the frequency of acute illness and chronic illness, and income in total utilization; the frequency of chronic illness and acute illness, and medical care insurance in physician visits. 5) According to the results of the path analysis, need factors had the greatest effect on utilization, and predisposing factors had more indirect effects through enabling or need factors than direct effects.
Summary
A Study on the Spectacles-wearing in Korea.
Seung Hum Yu, Yong Ho Lee, Woo Hyum Cho
Korean J Prev Med. 1987;20(1):120-128.
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AbstractAbstract PDF
To assess the proportion of spectacles-wearing and an aspect of familial aggregation of myoptic spectacles-wearing and to observe the birth cohort for myoptic spectacles-wearing, a nationwide self-administered questionnaire survey was conducted from March 11 to September 19, 1985. A probability sample of 13,346 persons was taken from 180 enumerated districts designated by the fifth nationwide tuberculosis prevalence survey from Korean Institute of Tuberculosis. The major findings of this survey are as follows: 1) Total of 62.5% of the study population lived in urban area whereas 37.5% lived in Eup-Myun area. There was statistically significant difference in age and sex distribution between two residential area. 2) The percentage of spectacles-wearing was 8.3% and among these, myoptic and hyperoptic spectacles were 6.0%, 2.3%, respectively. A total of 8.8% of the male study population wore spectacles and this was slightly higher than the female (8.0%). 3) Among the occupational groups, students were the highest myoptic spectacles-wearing group whereas professionals were the highest hyperoptic spectacles-wearing group. 4) The proportion of myoptic spectacles-wearing was higher in female students than in male students respectively 11.6%, 8.7%. There was an increasing tendency of spectacles-wearing as age increased. 5) The age-sex adjusted prevalence rate of myoptic spectacles-wearing by residential areas was 2 times higher in urban area than Eup-Myun area. 6) A wearing of the myoptic spectacles in early age was observed in recent birth cohort than remote birth cohort. 7) There was a tendency of familial aggregation for myoptic spectacles-wearing. The proportion of myoptic spectacles-wearing was 6 times higher for those who had parents wearing spectacles. 8) 60.9% of the total myoptic spectacles-wearing persons received the eye-specialist's order and 44.9% for the hyperoptic spectacles wearing.
Summary
A Study on the Health Care Utilization in Korea.
Seung Hum Yu, Yong Ho Lee, Woo Hyun Cho, Young Pyo Hong, Byoung Won Jin, Sang Jai Kim
Korean J Prev Med. 1986;19(1):137-145.
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AbstractAbstract PDF
A Nationwide health care utilization survey was conducted from March 11 to September 19, 1985 to assess the level of illness and the magnitude of medical care utilization. A probability sample of 15,427 persons was taken from 180 Enumerated Districts designated by the Economic Planning Board. Of those 4,500 housewives were proxy respondents. A interview was conducted with pre-tested questionnaire schedule which was recorded by well trained interviewers. Age and sex compositions of the study population were similar to those of general population structure in 1985. The major findings of this survey are as follows: 1) A total of 64.5% of the study population lived in city area and 35.5% lived in county area. 2) While no difference was observed in interview rate between city and county area, it showed statistically significant difference in the medical security program coverage rate between the two areas(44.7% and 37.1%, respectively). 3) Morbidity rate was 79 per 1,000 persons during the two week periods. There was difference in age and sex adjusted morbidity rates between city and county area. Furthermore morbidity rates by the status of the program were significantly difference between the two areas. 4) Average ambulatory care utilization rate was 7.2 visits per person per year and average admission rate was 1.8 per 100 persons per year. There was significant difference in average ambulatory care utilization rate by the program. but no significant difference in medical utilization rate between city and county area. 5) The major symptoms of the perceived illness was the respiratory system(44.1%). 6) A total of 50.4% of the perceived illness among the covered group by the program were treated at the hospital and clinics, but those who are not covered used primarily drug stores(61.3%).
Summary
Determinants of Length of Hospital Stay by Insured and Non-insured Patients.
Seung Hum Yu, Tae Young Lee, Dae Kyu Oh
Korean J Prev Med. 1983;16(1):157-162.
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AbstractAbstract PDF
In order to determine the factors affecting the length of stay by pay status, a total of 961 in-patients medical records with appendectomy, cholecystectomy and Cesarean section discharged from the January 1979 to December 1981 from the University hospital were reviewed. Average length of stay showed no statistically significant difference by year between the insured and the non-insured patients, however multiple diagnoses and surgical complication were significantly different from single diagnosis and non-complicated cases. Surgical complication explained the length of stay mostly, and physician in discharge, multiple diagnoses, and accommodation in order for insured patients. Surgical complication, admission route, physician in charge and age in order explained the length of stay for non-insured patients.
Summary
Hospital Services Utilization by Insured and Non-insured Patients for Cesarean Section in a University Hospital.
Seung Hum Yu, Woo Hyun Cho, Dai Kyu Oh
Korean J Prev Med. 1981;14(1):53-58.
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AbstractAbstract PDF
In order to discover difference that may exist in quantity of medical care services, length of stay and hospital changes between insured and non-insured patients, records for primary Cesarean section patients discharged between July 1978 and June 1980 from a university hospital were examined. In addition, Cesarean section rates among the total deliveries for a two-year period between the groups were studied. The results showed that volume of services was greater and length of stay was longer among the insured, however, charges were higher among the non-insured. Cesarean section rates were statistically significantly different between insured and non-insured patients for every age group except the group of 35 or more.
Summary
Peer, Consumers and Community Leaders Evaluation of the Koje Community Health Project.
Kit G Johnson, Seung Hum Yu
Korean J Prev Med. 1972;5(1):141-151.
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AbstractAbstract PDF
No abstract available.
Summary
Health Care and Days of Disability Survey Koje Island, Korea.
Seung Hum Yu, Kit G Johnson
Korean J Prev Med. 1972;5(1):133-140.
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AbstractAbstract PDF
No abstract available.
Summary
A Study of Knowledge, Attitude, and Practice Relative to Maternal and Child Health Among Women Residing in Apartments at Younsei Community Health Area.
Seung Hum Yu, Young Sook Chung, Kyung Ja Lee, Kwang Jong Kim
Korean J Prev Med. 1971;4(1):77-88.
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AbstractAbstract PDF
A study of the knowledge, attitude and practices about the maternal and child health of 305 married women residing in apartments at the Yonsei community Health area was conducted during the period from November to December 1970 using designed questionnaire with well trained interviews. The results and findings obtained from the study are summarized as follows : A. Pregnancy and Birth. Questions were asked about their last child. 1. 16.4% of the women were pregnant. 2. Among 281 women who hand experienced delivery, 48.0% were assisted by doctor or midwives for their last delivery, while the rest of women delivered their last baby at home without any professional's assistance. The higher the level of education or the greater exposure to mass communication, the more the deliveries were assisted by doctors or midwives. Those women who were born and raised in cities had more deliveries assisted by doctors and midwives than those who were not. 3. Kinds of delivery sheets used. Among 141 cases of home delivery 68% used cement bag paper or vinyl sheets. Three% used nothing and remained used unsterile materials. 4. Among 141 cases of home delivery, 70.2% used scissors. The rest of them used other methods. 5. 47.3% of the women had a rest for one month or more after birth. The higher the level of education, the longer the period of rest was observed. 6. 52.4% of the women fed the colostrum to their babies. This was not related to the mother's education. 7. About half(42.9%) of the women had poor knowledge about a proper diet for the pre and post natal period. B. Child Health. 1. Knowledge and practice regarding to the immunization for their children : Most of the women (93.2%) could name at least one kind of immunization. 20.3% could name 6 kinds of immunization. Mothers education level did not influence their ability to name immunizations. 85.2% of children had been immunized at least once. 2. Morbidity of last born children : 48.1% of their last born children were found to have been sick during the last year. Less than half (41.5%) of the sick children were seen by doctor. 3. Counselling at well baby clinic : most of the women (76.5%) had no counselling for their children. Registration rate at the well baby clinic at the Severance Hospital was 13.2%. 45.9% wanted to visit to the well baby clinic at the Severance Hospital. 4. Weaning Period : 44.6% said that the beginning of the weaning for their last born children was from 6 months to twelve months of age. The most important reason of weaning was the health of both mothers and children. 5. Knowledge and Practice regarding birth and death Registration : 64.6% of the women could name correctly the Ku-office as the place for the registration. Only 29.2% registered the birth of their last born children within 14 days. C. Knowledge, Attitude and Practice regarding to family planning Most : of the women accepted the idea of family planning. 97.7% could name at least one contraceptive method. 35.4% were found to be current users of countraceptive methods. The ideal number of children was 3.1 in average.
Summary

JPMPH : Journal of Preventive Medicine and Public Health