• The KIPS Transactions:PartB
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• v.11B no.4
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• pp.403-410
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• 2004

Recently, studies of image analysis, as the preprocessing stage for medical image analysis or image retrieval, are actively carried out. This paper intends to propose a way of utilizing color components for image retrieval. For image retrieval, it is based on color components, and for analysis of color, CLCM (Color Level Co-occurrence Matrix) and statistical techniques are used. CLCM proposed in this paper is to project color components on 3D space through geometric rotate transform and then, to interpret distribution that is made from the spatial relationship. CLCM is 2D histogram that is made in color model, which is created through geometric rotate transform of a color model. In order to analyze it, a statistical technique is used. Like CLCM, GLCM (Gray Level Co-occurrence Matrix)[1] and Invariant Moment [2,3] use 2D distribution chart, which use basic statistical techniques in order to interpret 2D data. However, even though GLCM and Invariant Moment are optimized in each domain, it is impossible to perfectly interpret irregular data available on the spatial coordinates. That is, GLCM and Invariant Moment use only the basic statistical techniques so reliability of the extracted features is low. In order to interpret the spatial relationship and weight of data, this study has used Principal Component Analysis [4,5] that is used in multivariate statistics. In order to increase accuracy of data, it has proposed a way to project color components on 3D space, to rotate it and then, to extract features of data from all angles.

• Korean Journal of Health Education and Promotion
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• v.15 no.2
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• pp.23-42
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• 1998

The purpose of this study is to show that, before registration of chronic degenerative diseases and enforcing management system in health centers, the management of hypertension could achieved comprehensively and continuously by knowing the realities of drug-taking and its related factors those who are being cared for in health centers. For one year, a questionnaire about drug-taking realities of hypertensive patient was distributed at 8 health centers in Taegu from March 24. 1997 to April 24. 1997. The questionnaires were then collected and analysed. The results are as follows: Of 691 patients, 77.4% of patient were taking medicine regularly every day. The reasons why patients weren't taking medicine every day was as follows: the blood pressure became normal(34%, the highest of the group), patients forgot(28.2%), it was difficult to buy the medicine(15.4%), there was no effect even though the patient took medicine continuously. The experience of medical treatment outside of health centers was 28.9%. The types and percentages of alternative medicine are herbs (50.5%), health food(24.5%), folk remedy(13.7%). Among them, 44.6% of patients didn't know if the medicine was effective. Medical treatment places excluding health centers was pharmacies(63.5%-the highest rate). In simple analysis, the older one was the more regularly one took the medicine, but there was no statistical relations. Of health activities, patients eating low-salt diet showed that they took the medicine regularly. Nonsmoking patients and those who experienced drug side-effect and those who doubted doctor's prescriptions and instructions showed that they took alternative, excluding modem medicine. Anti-hypertensive drug medication status according to recognition, attitude, experiences of hypertension showed that patients who thought that they should take anti-hypertensive drug during the whole life time took the medicine regularly(82.3%). The reasons for patients turning to alternatives varied. In case of having subjective symptom(34.1%), those who thought they knew the hypertension well(36.6%), they decided to use alternatives. In multiple logistic regression analysis the key statistics were as follows: The older patients, patients who ate low-salt diet, patients who thought that they should take anti-hypertensive drug during the whole life time, all showed that they took medicines regularly. And also patients who experienced drug side-effect, doubted prescriptions and instructions, and patients who had subjective symptoms, patients who thought that he knew the hypertension very well, all showed higher rate of using alternative medicine. In the future, at the health centers, to register and manage hypertension patients effectively, we must educate patients about regular drug-taking, and alternatives without doctor's prescriptions.

• Research in Community and Public Health Nursing
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• v.7 no.2
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• pp.313-332
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• 1996

This study was conducted to grasp the condition of freshman's knowledge and attitudes on abortion and to offer the basic materials to prevent abortion in family planning and health promotion. The objects were comprised of 290 who volunteered from 3 Junior colleges. The material of this study was by questionaire(chronbach a=.8589, .8959) suited to the purpose of this research which has been made through studying references. All the questionaires were collected immediately without explanation. The data was collected from the 29th of April to the 17th of May in 1996. Analysis of the data was done utilizing SPSS program for percentage, $mean{\pm}$ standard deviation and ANOVA. The results are as follows: 1. General features of the objects of study. Mean age was 20.47, mean of brothers and sisters was 2.93. Those who had no experience in abortion with her mother was 59.0%, and the middle social level was the highest (95.5%). 2. The conditions of attitudes about abortion. 5 points were given to 'very affirming' and, 1 point was given to 'strong denial' the total average was 4.00, and the range was $4.83\sim2.99$. 3. The condition of knowledge about abortion. 5 point were given to 'very affirming' and, 1 point was given to 'strong denial', the total average was 2.75, the range was $3.65\sim2.18$. Also knowledge of abortion was 6.2 points. Knowledge of medical and therapeutic abortion was 9.4 points. Knowledge of the physical complications of abortion was 3.4 points. 4. Correlation between general features and attitude variables. Age groups may have a higher affirmative attitude score in abortion(F=8.097, p<.000). The having 2 sisters group may have a low attitude towards abortion(F=10.34l, p<.000). Experience in abortion with mother group may have a lower affirmative score concerning abortion (t=8.925, p<.000). 5. Correlation between general features and knowledge variables. Age groups may have a higher knowledge score in abortion (F=10.829, p<.000). The having brothers group may have more high knowledge in abortion(F=2.534, p<.050). The $22\sim23$ years group may have higher knowledge in abortion (F=3.075, p<.028). The having more than 2 sisters group have more higher knowledge in abortion(F=5.605, p<.004). The having more the 3 brothers group may have higher knowledge the physical complications in abortion(F=4.022, p<.019). 6. Correlation between regions of the major variables and knowledge, attitude variables. There was no significance in the statistics.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.1
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• pp.453-461
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• 2015

The aim of this study was to find out the relationship between hospital structural factors and nurses' turnover rate. Nurse turnover rate and the hospital's characteristics was using Statistics for Hospital Management Data of Korean Health Industry Development Institute. The data were reported 247 hospitals in 2008 all over the country. The turnover rate among nurses was 32.0% in Korea as of 2008; those factors actually affecting the rate included whether the hospital was managed publicly or privately, the hospital size, region, the average salary for nurses, and the number of nurses per 100 beds. While each hospital had the turnover rate correlated with the total number of beds (r=-.322), the average salary for nurses(r=-.186) and the number of nurses per 100 beds (r=-.390), variables explaining the turnover rate were whether the hospital was managed publicly or privately, the number of beds, and the number of nurses per 100 beds ($R^2=.257$). In conclusion, nurses working in a privately-managed hospital and hospitals which had a smaller number of beds and which had a smaller number of nurses per 100 beds showed a higher turnover rate. Further study is required to elucidate the factors of the nurses' turnover.

• The Journal of Korean Medicine
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• v.26 no.2 s.62
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• pp.126-139
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• 2005

Objective: This study was undertaken to examine the reliability of disease mechanism diagnosis, estimate the disease mechanism items of questionnaires and inquire about the relation of disease mechanisms to the oriental OB & GY diagnosis program. Questionnaires and abridged questionnaires were used for the object diagnosis of oriental medicine in the dept of Oriental OB & GY, Oriental Medical Hospital of Dong-Eui University. Methods: We analyzed the results of questionnaires about 1706 outpatients who had OB & GY disease in the Oriental Medical Hospital of Dong-Eui University from April 2000 to March 2004. Results: 1. The reliability of Oriental OB & GY questionnaires between $90\%$ and $95\%$ were 9 cases, between $85\%$ and $90\%$ were 3 cases, and under $85\%$were 3 cases. Abridged questionnaires were lower than original questionnaires, but 12 cases of a total 15 cases of disease mechanism were above $85\%$. Therefore, both abridged questionnaires and original questionnaires had similar results. 2. Abridged questionnaires were usually lower than existing questionnaires in the comparison of disease mechanism output frequency and that of disease mechanism average score. Therefore, the results of abridged questionnaires seemed to be poorer than those of existing questionnaires, but a great difference wasn't seen. 3. Disease mechanism that was over $50\%$ in the rate of pure question per disease mechanism was 10 cases $(66.7\%)$. Disease mechanism that contributed to producing disease mechanism result and in which pure question was over relevance calculation 0.9 was also 10 cases $(66.7\%)$. In abridged questionnaires, the duplication of questions per disease mechanism Was decreased, the rate of pure questions was increased, and the number of related disease mechanisms was decreased by abridgment of the questionnaires' questions. 4. The calculation of disease mechanism went with the increase of the duplication of questions in many cases, but Tam­Umhe, Kihe-Hyule, Kihe-Umhe, and Shin-Tam went with disease mechanism in many cases despite no duplication of questions. Conclusions: About the reliability of Oriental OB & GY questionnaires, 12 of a total 15 cases of disease mechanism were above $85\%$; therefore both abridged questionnaires and original questionnaires had similar results.

• The Journal of Korean Medicine
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• v.31 no.4
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• pp.101-114
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• 2010

Background: Currently, evidence-based medicine is widely propagated as a reference for proper clinical practice. As a result, there is an increasing need for more clinical trials based on Oriental diagnostic methods to evaluate the efficacy of Oriental medicine, including acupuncture and herbal medicine. The purpose of this study was to confirm which symptoms are adequate indicators of effects of Ojeock-san for lower back pain and develop a questionnaire to evaluate its effects. Methods: We interviewed 102 Oriental medical doctors working in Seoul with a preformed questionnaire which included questions about symptoms of lower back pain and indicators for Ojeock-san. We sampled respondents who answered that they trust the effectiveness of Ojeock-san in telephone survey carried out using multistage stratified random sampling technique from March to April, 2009. We categorized the respondents into two groups, differentiating them by gender, career, workplace, and trust level of Ojeock-san effect. Results: About half of the respondents selected 13 questions as the adequate indicators of Ojeock-san for low back pain. There were no differences in the top 11 selected indicators in total selection and top 3 ranking selection. The comparison of frequency of top 13 questions in total selections between the two groups showed no difference. Conclusions: There were 13 symptoms which were considered adequate indicators of effects of Ojeock-san for lower back pain found by many Oriental medical doctors. This questionnaire can be utilized as a diagnostic adjunctive tool, tested for validity and reliability of questionnaires through further studies.

• Journal of Preventive Medicine and Public Health
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• v.32 no.2
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• pp.113-122
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• 1999

Objectives: The purpose of this study was to describe the trends of original research in the Korean Journal of Preventive Medicine, and to evaluate the quality of original articles about lead poisoning. Method: The data for the analysis of trends in preventive medicine research was taker from a total of 829 original articles published in the Korean Journal of Preventive Medicine from 1968 to 1997, The qualitative meta-analysis was measured against a checklist of evaluation criteria, which were divided into 10 categories, with 46 articles on lead poisoning. The evaluation process was performed independently by two evaluators, Results: The number of articles per 100 members over the study period increased by almost 4 pieces in the early 1980s, and by more than 9 pieces in the mid-1990s. In the major classifications of subjects, environmental and industrial health, epidemiology and health statistics, and health policy and management published 370 pieces (44.0%), 137 pisces (16.5%), 322 pieces (38.9%) respectively. In the order of the number of articles, five themes about health significance, including metal exposure (73 pieces), diseases associated with exposure to organic solvents (45 pieces), air pollution (36 pieces), maternal and child health (32 pieces), and occupational health (3D pieces) received consistent attention throughout the years $1968\sim1997$. The overall mean score of article qualify about lead poisoning was 37.8 out of 50. Of the articles any information on the purpose and hypothesis described well, Of those the originality of the subjects, the form of article's (including tables and figures), and the number of inappropriate words of abstracts showed very low score. For multiple regression analyses, the number of joint research institutes and the acceptance of research grants about the article quality were statistically significant. Conclusions: The number of original research reports in the Korean J Prev Med has recently increased and their subjects bave diversified. Of the basis of this study, the articles need improvement in the areas of abstracts, tables and illustrations (figures), etc. The Korean Society for Preventive Medicine will revise contribution regulations for manuscripts submitted to the Korean J Prev Med. Future studies should address these issues and perform the quantitative mata-analysis about the specific subjects including the quality of articles.

• The Journal of Korean Medicine
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• v.27 no.2 s.66
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• pp.23-35
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• 2006

Objectives : This study examined the reliability of disease mechanism diagnosis, to evaluate items of questionnaires and inquire about the relationships between disease mechanisms and 'diagnosis program' questionnaires used for the objective diagnosis of Oriental medicine in the department of Oriental OB&GYN, Oriental Medical Hospital of Dongeui University. Method : We analyzed the results of questionnaires from 3504 outpatients of OB&GYN disease at the Oriental Medical Hospital of Dongeui University from April 2000 to April 2005. Results & Conclusions : 1. The research questionnaire had 188 questions, the summary questionnaire 137, and the diagnosis questionnaire 80. 2. The reliability of all questionnaires shows above 90% in deficiency of qi, deficiency of Yin, insufficiency of Yang coldness heat syndrome liver and spleen kidney in all, 8 case disease mechanisms. These are higher in the diagnosis questionnaires than in the research questionnaires and the summary questionnaires, except for kidney disease mechanism. 3. Cronbach a of the questionnaires decreased, especially blood deficiency, phlegm, heat syndrome, and insufficiency of Yang; these 4 case disease mechanisms were lower than 0.6. 4. For degree of correspondence of meeting points, both. the diagnosis and the summary questionnaires were above 80% with the exception of the 2 case disease mechanisms heart and blood deficiency. The meeting points of both the diagnosis and research questionnaires were above 80% in the to case disease mechanisms deficiency of qi blood stasis deficiency of Yim insufficiency of Yang damp dryness liver spleen kidney phlegm. 5. The change in the result values of questionnaires was a decreased level of deficiency of qi heat syndrome phlegm damp kidney and raised level of coldness heart disorder of qi dryness 6. The computation degree of disease mechanism in DSOM(r) D.1.1 was much lower on phlegm deficiency of qi heat syndrome disorder of blood, somewhat lower on insufficiency of Yang and higher on coldness than in the two different questionnaires.

• The Korean Journal of Applied Statistics
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• v.23 no.3
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• pp.497-510
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• 2010

In medical practice and research, the problem of assessing reliability between two or more quantitative measures is quite common. Intraclass correlation coefficient(ICC) is commonly used to scale of reliability. Some methods were developed to calculate the required number of subjects, raters or replicates in one-way or two-way random ANOVA models. This paper, studies and compares the performance of four methods such as Walter et al. (1998), Giraudeau and Mary (2001), Saito et al. (2006) and Bonett (2002). In order to compare the efficiency of methods we compare the number of subjects, replicates and the width of confidence interval of ICC needed for some specific ICC values. In the case of subject size, Giraudeau's method is the best. In case of the number of replicates, Saito's method was superior to others. The width of confidence interval of ICC was narrower for Giraudeau's method than any others.

• The Korean Journal of Applied Statistics
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• v.30 no.3
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• pp.453-462
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• 2017

Double propensity score adjustment is an analytic solution to address bias due to incomplete matching. However, it is difficult to estimate the standard error of the estimated treatment effect when using double propensity score adjustment. In this study, we propose two bootstrap methods to estimate the standard error. The first is a simple bootstrap method that involves drawing bootstrap samples from the matched sample using the propensity score as well as estimating the standard error from the bootstrapped samples. The second is a complex bootstrap method that draws bootstrap samples first from the original sample and then applies the propensity score matching to each bootstrapped sample. We examined the performances of the two methods using simulations under various scenarios. The estimates of standard error using the complex bootstrap were closer to the empirical standard error than those using the simple bootstrap. The simple bootstrap methods tended to underestimate. In addition, the coverage rates of a 95% confidence interval using the complex bootstrap were closer to the advertised rate of 0.95. We applied the two methods to a real data example and found also that the estimate of the standard error using the simple bootstrap was smaller than that using the complex bootstrap.