• Title/Summary/Keyword: multiple regression function

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The Effect of Body Mass Index, Fat Percentage, and Fat-free Mass Index on Pulmonary Function Test -With Particular Reference to Parameters Derived from Forced Expiratory Volume Curve- (신체질량지수 및 체지방률, 그리고 제지방지수가 폐기능 검사에 미치는 영향 -노력성 호기곡선을 중심으로-)

  • Park, Ji Young;Pack, Jong Hae;Park, Hye Jung;Bae, Seong Wook;Shin, Kyeong Cheol;Chung, Jin Hong;Lee, Kwan Ho
    • Tuberculosis and Respiratory Diseases
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    • v.54 no.2
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    • pp.210-218
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    • 2003
  • Background : Sex specific cross sectional reference values for the lung function indices usually employ a linear model with a term for age and height. The purpose of this study was to determine the effects of the body mass index (BMI), the fat percentage of the body mass and the fat-free mass index (FFMI) on the forced expiratory volume curve. Methods : Between January 2000 and December 2001, a total of 300 subjects, 150 men and 150 women (mean age : $45{\pm}13$ years), with a normal lung function were enrolled in the study sample. This study measured the $FEV_1$, FVC and $FEF_{25-75%}$ from the forced expiratory volume curve by a spirometer and the body composition by a bioelectrical impedance method in all subjects. Multiple regression analysis was used in order to examine the effects of the body composition on the parameters derived from the forced expiratory volume curve. Results : After adjusting for age, the BMI and Fat percentage improved the descriptions of the FVC (p<0.05, $r^2=0.491$) and $FEV_1$ (p<0.05, $r^2=0.654$) in women. In contrast, the FFMI contributed significantly to the FVC (p<0.05, $r^2=0.432$) and $FEV_1$ (p<0.05, $r^2=0.567$) in men. The $FEF_{25-75%}$ correlated with the fat percentage in women (p<0.05, $r^2=0.337$). Conclusion : These results suggest that the BMI, the fat percentage and the FFMI are significant determinants of the forced expiratory volume curve. The plmonary function test, when considering the BMI, the fat percentage and the FFMI, might be useful in clinical applications.

An Analysis on the Impacts of High-Tech Complex on Neighborhood Housing Price (첨단산업단지가 주변지역 주택가격에 미치는 영향요인 분석)

  • Park, Dong-Wong;Lee, Joo-Hyung
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.10
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    • pp.4543-4550
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    • 2012
  • The purpose of this paper is to suggest the improvement method to achieve the interactive development effect between high-tech industrial complex and its surrounding areas. For this reason, this paper has conducted an empirical analysis to find out relevant comprehensive factors, affecting nearby housing prices from such plans, especially by reviewing 'Seoul Digital Industrial Complex.' This paper is truly differentiated from previous research by adding a new perspective 'diverse location characteristics', as it focuses not only on 'high-tech facility' characteristics, but also on 'urban function facilities', including 'transportation facilities', 'amenity facilities', 'security facilities', etc. Then, SPSS Version 18.0 was utilized to conduct the multiple regression analysis with the accumulated relevant data and several results were drawn out as following: Firstly, 'deterioration level', 'brand of apartment', etc. are found to be major influencing factors. Secondly, 'educational facilities', 'transportation facilities', 'Cultural & Sports facilities', 'Amenity facilities', etc. are found in the sector of 'location characteristic'. Lastly, 'leading companies within the industrial complex', were also found, affecting nearby housing prices. Therefore, when a housing development project is planned to grant the interactive development effect to high-tech industrial complex and its surrounding housing areas, it is necessary to consider variety factors, such as comprehensive location characteristics and housing complex characteristics, and also proper housing policy measures should be devised in accordance with the actual demand of employees and their dependant family members.

A study of the relationship between corporate governance and real earnings management: Based on foreign investors and growth (기업지배구조와 실제이익조정의 관계 연구: 외국인투자자와 성장성을 중심으로)

  • Kang, Shin-Ae;Kim, Tae-Joong
    • Journal of Distribution Science
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    • v.12 no.4
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    • pp.85-92
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    • 2014
  • Purpose - This study conducted empirical research on non-financial corporations listed on the stock exchange from 2001 to 2010, focusing on the effects of corporate governance on real earnings management of corporations. In particular, this study examined primarily the impact of the largest shareholder who could use earnings management to pursue his own self-interest, and foreign investors who played a checking role against the largest shareholders. The study also reviewed the relationship between corporate governance and earnings management while also considering corporate growth. Research design, data, and methodology - As for the measurements of real earnings management, abnormal operating cash flow and abnormal production cost were utilized. As for the independent variables, share ratio of the largest shareholder and affiliate person (M) and share ratio of foreign investors (FT) were leveraged. This study excluded those organizations that had changed their fiscal years, those that had not submitted an audit report, corporations under supervision, delisted corporations, corporations that had changed their business type, and so on, from the non-financial corporations out of the publicly traded corporations whose fiscal year ended in December from 2001 to 2010 in addition, KIS values were utilized for the corporate financial data in the study. To verify whether management structure and growth had an impact on real earnings management of a corporation through empirical analysis, a multiple regression analysis model was applied. Result - First, as a result of the analysis, the share ratio (M) of the largest shareholder and affiliate person was found to have a significant positive correlation with abnormal cash flow from operations(ACF) and abnormal production cost (APD). When controlling the growth, the share ratio (M) of the largest shareholder and affiliate person was found to have an insignificant correlation with abnormal cash flow from operations(ACF) but a significant correlation with abnormal production cost (APD). Second, foreign ownership (FT) was found to have a significant positive correlation with abnormal cash flow from operations(ACF) and abnormal production cost (APD) at the confidence level of 1 percent when not including the growth dummy. When controlling the growth, foreign ownership (FT) was found to have a significant negative correlation with abnormal cash flow from operations (ACF) and with abnormal production cost (APD). Conclusion - The results imply that the largest shareholder is closely related to earnings management through real activities regardless of corporate growth. It is also possible to determine from these results that foreign investors are related to earnings management through real activities when not considering corporate growth, but that they would reduce earnings management in the case of considering the growth. Thus, this study verified along with the existing studies that foreign investors were conducting the control function on controlling shareholders.

Analysis of Nurse Teachers대 Attitudes toward School Health Computerization (학교보건업무 전산화에 대한 서울시 양호교사의 태도 분석)

  • 권미옥
    • Journal of Korean Academy of Nursing
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    • v.25 no.4
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    • pp.729-740
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    • 1995
  • The purpose of this study is to provide basic data for school health computerization by investigating the nurse teacher's attitudes toward school health computerization. For this study, the questionnaires were given to 559 nurse teachers from 3. March to 17. March, 1995. Among them, 338 were returned and included for the analysis. The results of the study were as follows : 1. In general characteristics, the results showed average of 38.6 years in age ; and average of 11.1 years in education experience. In distribution of school, the result showed 47.0% in elementary school, 30.5% in middle school and 22.5% in high school ; 75.4% national and public school vs 26.4% private school. 2. In attitudes of computerization, the score was varied from 19 to 76 point. The attitudes was generally positive with the average of 60.23±7.63(SD) score. The respondents are willing to participate in computer education(the highest score, 3.69), they worry about electromagnetic waves by computer (the lowest score : 2.30). 3. 92.6% of the respondents want to participate in computer education. The major reason the respondents have not yet learned computer is that they had little chance to learn. While 58.0% of them answered that they had an experience of computer use in school health works, few schools had computer in dispensary. In computer use, nurse teachers in public school have more experience than ones in private school. Word processing was the major function that the most respondents can do(62.7%). They answered that they have little knowledge of computer (84.0%). 4. Computer can be utilized in school health works as follows in order : message from school to home, reports, annual plan and statistics. 65.4% of them answered that computer can be used in 10 items of 13 items. 5. The attitudes of computerization showed differences in the following variables career, age, existence of computer in school health clinic, experience of computer use, intention to participate in computer education, computer knowledge, frequent computer use, ability of computer use, school health computerization areas, experience of computer education. Among there variables, age, existence of computer in school health clinic, intention to participate in computer education, ability of computer use, school health computerization areas showed significant explanation(28.3%) for the attitudes of computerization in multiple regression analysis The younger. the higher degree of intention, the more functions they can perform, the more school health computerization areas, and the more computers in school health clinic, the more positive attitude on school health computerization. In conclusion, to achieve the successful computerization of school health works, the positive attitudes of nurse teachers should be encourged for school health computerization. For this purpose, the chance of computer education should be given as many times as possible. And administerial as well as financial support are essential for enlarging the knowledge and ability of computer.

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The Effect of Dance Therapy on Physical and Psychological Characteristics in The Elderly (무용요법이 노인의 신체적.심리적 특성에 미치는 효과)

  • 이영란
    • Journal of Korean Academy of Nursing
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    • v.29 no.2
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    • pp.429-444
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    • 1999
  • This study was performed to explore the effects of a dance therapy on physical and psychological characteristics in the elderly. The design of this study was a non-equivalent pre-post test experiment. The subjects consisted of elderly persons living in a facility located in Suweon and Bucheon. Fifty eight subjects, aged between 65 and 93 years who had normal cognition, sensory function, balance, and resting blood pressure. They underwent tests of balance, flexibility, muscle strength, depression, and anxiety as baseline data before dance therapy, and at 6th week and at the end of the 12nd week after following dance therapy. Twenty seven elderly persons were assigned to the experimental group and participated with the dance therapy between April and July, 1998. The dance therapy was developed by the author with the help of a dance therapist and a physiatrist. This therapy was based on the Marian Chace's dance therapy and Korean traditional dance with music. The dance therapy consists of 50 minutes session, 3 times a week for 12 weeks. One session was consisted of warming-up, expression, catharsis, sharing, and closing stage. The intensity of the dance therapy was at the 40 % of age-adjusted maximum heart rates. Data were analysed with mead standard deviation, Chi-square test, unpaired t-test, repeated measures ANOVA, and Bonferroni multiple regression using SAS program. 1. The results related to the physical characteristics were as follows : 1) The balance (standing on one leg, walking on the balancing bar), flexibility and muscle strength (knee extensor, knee flexor, ankle plantarflexor and dorsiflexor) of the experimental subjects significantly increased over time mere than that of the control subjects. 2) The experimental group had significantly higher score for balance, flexibility, muscle strength of knee extensor, and knee flexor than the control group at the 12nd week after dance therapy. 3) The experimental group had significantly higher score for muscle strength of ankle dorsiflexor and plantarflexor than the control group at the 6th week and the 12nd week after dance therapy. 2. The results related to psychological characteristics were as follows : 1) Scores of Geriatric Depression Scale, Hamilton Depression Rating Scale, and Zung's Self-rating Anxiety Scale of the experimental group were significantly decreased over time more than that of the control group. 2) The experimental group had significantly lower score for depression than the control group at the 12nd week after dance therapy. 3) The experimental group had significantly lower score for anxiety than the control group at the 6th week and the 12nd week after dance therapy. The findings showed that the dance therapy could be effective in improving the balances, flexibility, and muscle strength of lower limb, and effective in decreasing the depression and anxiety of the elderly. Additional merits of the dance therapy would be inexpensiveness, easy accessibility, and increasing interpersonal relationship. It can be suggested that the dance therapy is effective in the health promotion of the elderly.

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Bayesian Network Analysis for the Dynamic Prediction of Financial Performance Using Corporate Social Responsibility Activities (베이지안 네트워크를 이용한 기업의 사회적 책임활동과 재무성과)

  • Sun, Eun-Jung
    • Management & Information Systems Review
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    • v.34 no.5
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    • pp.71-92
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    • 2015
  • This study analyzes the impact of Corporate Social Responsibility (CSR) activities on financial performances using Bayesian Network. The research tries to overcome the issues of the uniform assumption of a linear function between financial performance and CSR activities in multiple regression analysis widely used in previous studies. It is required to infer a causal relationship between activities of CSR which have an impact on the financial performances. Identifying the relationship would empower the firms to improve their financial performance by informing the decision makers about the different CSR activities that influence the financial performance of the firms. This research proposes General Bayesian Network (GBN) and presents Markov Blanket induced from GBN. It is empirically demonstrated that all the proposals presented in this study are statistically significant by the results of the research conducted by Korean Economic Justice Institute (KEJI) under Citizen's Coalition for Economic Justice (CCEJ) which investigated approximately 200 companies in Korea based on Korean Economic Justice Institute Index (KEJI index) from 2005 to 2011. The Bayesian Network to effectively infer the properties affecting financial performances through the probabilistic causal relationship. Moreover, I found that there is a causal relationship among CSR activities variable; that is Environment protection is related to Customer protection, Employee satisfaction, and firm size; Soundness is related to Total CSR Evaluation Score, Debt-Assets Ratio. Though the what-if analysis, I suggest to the sensitive factor among the explanatory variables.

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An Analytic Study on Influencing Factors for Sexual Satisfaction in Women Who have had a Hysterectomy (자궁절제술 부인의 성생활 만족에 관한 요인 분석)

  • 장순복
    • Journal of Korean Academy of Nursing
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    • v.19 no.2
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    • pp.160-172
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    • 1989
  • This research was done to clarify the factors related to sexual satifaction in women who have had a hysterectomy, and to idenify which factors had statistically significant influence of sexual satisfaction of the subjacts. The objective of this study was to identify the variables related to sexual adaptation which might be changed by nursing intervention. This was a cross-sectional descriptive correlation study. There were 230 subjects in the study, and they were selected by a convenient sampling method. The tool. for this study was developed by the researcher through modification of the Dergatis Sexual Function Inventory(DSFI). A pilot study was done to determine the necessary modifications. Data collection was done between Sept. 1987 and Du. 1987 using a mailed questionnaire. The characteristics of the subjects were as follows : The mean age of the subjects was 42.3 years and 204(87.4%) of the subjects had nine or more years of education. The mean income of the subjects was 85.8870 won / month, and 179(77%) of them were housewives. The mean number of pregnancies and children were 4.9 and 2.5 respectively. Oophorectomies were included in the surgery for 66(28.7%) of the subjects. Only 12(5.2%) were planning to have more children. Only 88(38.3%) of the subjects had received information prior to the surgery regarding health problems related to the operation and less than half, 111 (48.3%), had received this kind of information before discharge. Lay persons were the source of information about the post-operation status for 196 (85.2%) of the subjects, but the content of the information did not significantly influence the sexual satisfaction score. Only 16(7.0%) of the subjects said they regretted having a hysterctomy while 102(44.3%) said they were pleased to have had a hysterectomy. Ninety (39.1 %) of the subjects reported that their husbands had “stress” and 164(71.3%) of the subjects reported “stress”. The results of this study are summarized as follows : 1. The mean score for sexual satisfaction of the subjects was 34.24 with a possible maximum score of 50.00. Eighty two(35.8%) were responded that they were satisfied with their sexual life but 61 (26.5%) were responded that they were dissatisfied with their sexual life 2. The following 15 factors extracted from the results of the data analysis were significantly related to sexual satisfaction(p<.05) ; support of husband, body image, emotion, knowledge of sex, menopausal symptoms, sexual behavior, the feelings the subjects had about the hysterectomy, stress for both subject and husband, the number of children, health information given before operation, job, age, level of education and income. The five most important factors influencing sexual satisfaction were identified by using stepwise multiple regression analysis. The most important factor was support of husband, which explained 17.83% of the total variance. The remaining factors in order of significance were : Knowledge of sex, income, job, and emotional status. Those five factors explained 35.16% of the sexual satisfaction. In conclusion, for the care of women who are going to be discharged from hospital after having had a hysterctomy, nurses have to work with the husbands to help them to understand the importance of their support. Nurses also need to make sure that the subjects have an adequeate knowledge of sexual life after a hysterectomy. Also nursing interventions should focus on subjects who do not have a job, who are of low economic status, and the subjects who are under the unpleasant mood.

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Sexual Life of Husband and Wife after Hysterectomy (자궁절제술을 받은 여성과 배우자의 성생활)

  • Kim, Jin-Kyung;Koh, Hyo-Jung
    • Women's Health Nursing
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    • v.7 no.1
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    • pp.18-29
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    • 2001
  • The purpose of this study was to provide basic data from confirming factors that could help nurses tailor counseling program for married couples who were facing the prospect of a hysterectomy. A descriptive design was used to study a total of 81 married couples(total of 162 subjects) between 2 to 18 months after hysterectomy, due to a benign gynecology disease at a University Hospital in Daegu by questionnaires from March, 1999 to June, 2000. This study used Sexual Knowledge Measurement of Koo, Ja-sung(1996), Sexual Attitude Scales of Hudson, Murphy and Nurius(1994), Sexual Attitude Measurement of Jang, Soon-bok(1989), Sexual Activity Questionnaires of Thiriaway, Fallowfield and Cuzick(1996) modified and supplemented by advice of experts in order to measure sexual knowledge, sexual attitude and sexual activity, and Sexual Function Inventory of Derogatis(1979) translated by Jang, Soon-bok(1984) was used to measure sexual satisfaction of the subjects. For data analysis, the study executed $x^2$-test, t-test, ANOVA, Pearson correlation and multiple regression in accordance with the purpose of study by SPSS/PC+ WIN 10.0 program. Also this study obtained Cronbach's alpha for examination of reliability. The results are as follows : 1) The sexual knowledge of the husband was higher than that of the wife after hysterectomy by showing the mean 11.27(${\pm}2.72$) in case of the wife and the mean 11.57(${\pm}2.28$) in case of the husband, but there was no statistically significant difference(t=.681, p=.497). 2)The sexual attitude of the husband was more liberal than that of the wife after hysterectomy by showing the mean 3.25(${\pm}.48$) in case of the wife and the mean 3.42(${\pm}.48$) in case of the husband, and there was statistically significant difference(t=2.399, p=.018). 3)There was no statistically significant difference between the score of sexual activity of wife and husband by period elapsed after hysterectomy. 4)There was no statistically significant difference between the score of sexual satisfaction of wife and husband by period elapsed after hysterectomy. 5)The wife subjects showed positive correlation among sexual knowledge, sexual attitude, sexual activity and sexual satisfaction. The husband subjects showed positive correlation only between sexual knowledge and sexual activity, sexual activity and sexual satisfaction, sexual attitude and sexual satisfaction, sexual knowledge and sexual satisfaction. There was a positive correlation between the sexual knowledge, sexual attitude, sexual activity and sexual satisfaction of the wife and husband. 6)Only the variable of sexual activity among factors of sexual satisfaction of the wife subjects showed the statistical significance(F=52.452, p<0.001), while variables of sexual attitude (F=20.360, p<0.001) and sexual activity (F=14.142, p<0.05) among factors of sexual satisfaction of the husband subjects showed a statistical significance.

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Centering Effect of the Transactional Leadership between the Social Worker Empowerment and Social Work Self-Efficacy in Social Work Practice (사회복지실천에서 리더의 변혁적 리더십이 사회복지사의 역량강화와 자기효능감에 미치는 조절효과에 관한 연구)

  • Park, Bong-Gil;Jeong, Sun-Young
    • Korean Journal of Social Welfare
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    • v.58 no.4
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    • pp.341-369
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    • 2006
  • This study attempts to explain how the social-worker empowerment in the field of social work relates to social-work self-efficacy and whether or not the transactional leadership of the leader moderates the relationship between these two variables. Data from 390 social workers working with public and private sector agencies in Seoul were collected. For the questionnaire and analysis, this research uses the Social Worker Empowerment, Social Work Self-Efficacy, and Transactional Leadership scales. This research utilizes a wide range of statistical analyses, such as descriptive analysis, Pearson's correlation, reliability analysis, factor analysis, multiple regression, and general linear modeling. The calculations employed the use of SPSS/PC+ 12.0. This research indicates, among other things, that social workers with a high level of social worker empowerment and transactional leadership of the leader show a tendency toward higher social work self-efficacy and that the leader's transactional leadership level plays a moderating function in the relationship between social-worker empowerment and transactional leadership of the leader. In conclusion, a social worker with a low level of leader's transactional leadership shows a relatively greater tendency toward social work self-efficacy when compared to a social worker having a high level of leader's transactional leadership. Social workers and social-work organizations seeking professional practice can benefit from these findings on the relationship between professional behavior and social work self-efficacy with perceived transactional leadership about a team leader as a moderator.

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Quality of Life and Its Association with Physical and Mental Function in the Elderly People Affiliated with Long-term Care Insurance Services (노인 장기요양보험급여 이용자들의 삶의 질과 신체적 및 정신적 기능과의 관련성)

  • Kim, Hyeong-Seon;Park, Jae-Young;Kwon, In-Sun;Cho, Young-Chae
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.10
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    • pp.3808-3819
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    • 2010
  • This study was performed to determine the levels of quality of life(QOL) according to the grade of long-term care service in the elderly people who were judged from long-term care insurance, and to reveal its association with related variables. The interviews were made to 958 elderlies in urban and rural areas from March 1 to May 31, 2009. The mean scores of QOL among all subjects were $55.4{\pm}15.62$(Grade I; $49.7{\pm}14.17$, Grade II; $56.8{\pm}14.62$, Grade III; $59.4{\pm}16.36$), and they were lower according to the higher grade of long-term care insurance. The multiple regression analysis was used to reveal the explanatory powers of factors influencing on the level QOL. Such factors as educational level, monthly income, subjective health status, depression and MMSE-K were shown to affect their QOL in Grade I, Grade II, and Grade III with explanatory powers of 45~62%.