• Journal of Korean Academy of Nursing
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• v.35 no.4
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• pp.701-708
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• 2005

Purpose. This study examined the characteristics of fatigue and the relationship between fatigue and its related factors in Korean patients on hemodialysis. Methods. A cross-sectional correlational study was conducted with 104 patients on hemodialysis in Seoul, Korea. Finding. Of a total of 104 subjects, eighty-one ($77.9\%$) complained of fatigue. Fatigue severity was measured by the self-rating Visual Analogue Scale-Fatigue (VAS-F) with a mean score of 36.5 (SD = 17.49, range 2 - 81). The mean duration of fatigue was 3.8 hours (SD = 5.3, range 0 - 24). Depression was most significantly correlated with fatigue (beta = .43, p<.00), with interdialytic weight gain (beta = .25, p<.05) being the second most significant correlate. Conclusion. This study shows that nursing interventions for patients who experience fatigue while on hemodialysis should be focused on both psychological problems, such as depression, as well as on physiological problems, such as interdialytic weight gain.

• Structural Engineering and Mechanics
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• v.17 no.1
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• pp.51-68
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• 2004

Since the linear elastic fracture analysis has been proved to be insufficient in predicting the failure of strain hardening materials, a number of fracture concepts have been studied which remain applicable in the presence of plasticity near a crack tip. This work thereby presents a new finite element model to predict the elastic-plastic crack-tip field and fatigue life of center-cracked panels(CCP) with ductile fracture under large-scale yielding conditions. Also, this study has been carried out to investigate the path-dependence of J-integral within the plastic zone for elastic-perfectly plastic, bilinear elastic-plastic, and nonlinear elastic-plastic materials. Based on the incremental theory of plasticity, the p-version finite element is employed to account for the accurate values of J-integral, the most dominant fracture parameter, and the shape of plastic zone near a crack tip by using the J-integral method. To predict the fatigue life, the conventional Paris law has been modified by substituting the range of J-value denoted by ${\Delta}J$ for ${\Delta}K$. The experimental fatigue test is conducted with five CCP specimens to validate the accuracy of the proposed model. It is noted that the relationship between the crack length a and ${\Delta}K$ in LEFM analysis shows a strong linearity, on the other hand, the nonlinear relationship between a and ${\Delta}J$ is detected in EPFM analysis. Therefore, this trend will be depended especially in the case of large scale yielding. The numerical results by the proposed model are compared with the theoretical solutions in literatures, experimental results, and the numerical solutions by the conventional h-version of the finite element method.

• Korean Journal of Adult Nursing
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• v.28 no.2
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• pp.226-236
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• 2016

Purpose: The aim of this study was to evaluate the nutritional status and to identify factors affecting malnutrition in hemodialysis patients. Methods: Data were collected from a convenience sample of 125 hemodialysis patients who agreed to participate in the study, between August 1 and October 4, 2014. Five structured questionnaires were used: Patient-generated Subjective Global Assessment, Simplified Nutritional Appetite Questionnaire, Self-rating Depression Scale, Fatigue Scale, and Family Support Scale. Data were analyzed by descriptive statistics, t-test, Mann-Whitney U test, ${\chi}^2$-test, and stepwise multiple regression analysis by using SPSS/WIN 22.0 program. Results: Of 125 patients, 30.4% were found to be malnourished. Malnutrition was related to age, family household income, depression, fatigue, social support, appetite, and levels of C-reactive protein and serum albumin. Stepwise multiple regression analysis showed that appetite, C-reactive protein level, fatigue, and albumin level were significant factors affecting malnutrition in hemodialysis patients. Conclusion: Regular and consistent nutritional assessment is essential in hemodialysis patients. Nurses who care for hemodialysis patients need to consider the factors identified from these findings when assessing their patients' nutritional status and needs.

• Korean Journal of Health Education and Promotion
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• v.33 no.3
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• pp.25-35
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• 2016

Objectives: The purpose of this study is to determine the fatigue, self-esteem, and depression of pregnant women with gestational diabetes mellitus (G-DM), and to reveal associated factors of depression. Methods: As a descriptive correlation study, data was collected from 119 pregnant women with G-DM. Data was analysed using t-test, ANOVA, and stepwise multiple regression. Results: Fatigue, self-esteem, and depression averaged $2.09{\pm}.62$ (range of scale 1~4), $2.63{\pm}.32$ (range of scale 1~6), and $0.45{\pm}.25$ (range of scale 0~3), respectively. The depression varied with a statistical significance according to the age (p=.008), employment (p=.014), child (p=.034), and physical and psychological adjustment of pregnancy (p<.001). We also identified fatigue as the most influencing factor and the physical and psychological adjustment of pregnancy as the second most influencing factor, self-esteem as the third, age as the fourth, and child as the influencing factor on the G-DM women's depression. Conclusions: This research provided a valuable opportunity to recognize G-DM as a personal, and societal problem, which calls for relational support as well as personal support. The healthcare providers need to recognize the emotional aspects of the women with G-DM, and make various efforts to promote the physical and psychological health of the G-DM patients.

• Journal of Korean society of Dental Hygiene
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• v.10 no.4
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• pp.595-605
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• 2010

Objectives : A precedent research has documented that occupational stress is closely associated with increased the risk of fatigue and decreased in job satisfaction. This study was conducted in an effort to assess the relationship of occupational stress to self-perceived fatigue and job satisfaction by using job strain model. Methods : The number of respondents was 122 dental hygienist who work in dental clinic and period of the investigation was July 2009 through september 2009. A structured questionnaire was employed to evaluate the participants' sociodemographics, job-related factors, health-related behaviors, occupational stress, job satisfaction and self-perceived fatigue. Occupational stress and self-perceived fatigue were assessed using the Korean Occupational Stress Scale-Short form (KOSS-SF) and the Multidimensional Fatigue Scale (MFS), respectively. Results : In job strain model, the ratio of Q2(High Strain Job) group that more susceptible to disease by stress than other group was 16% and the proportion of high fatigue group(Q3, Q4 group) and low job satisfaction group(Q3, Q4 group) was 48%, 45% respectively. In logistic regression analyses, a High Strain Job group was associated with higher odds of react factor(fatigue, job satisfaction) and the odds was down by 3.3%~7.5% after adjustment for age, smoking, alcohol drinking, regular exercise. So the effective strategy for fatigue, job satisfaction reduction for dental hygienist requires additional program focusing on innovated work environment that provide a enough leisure time and exercise program considering the personality traits. Conclusions : The results of this study suggest that occupational stress is a determinant predictor of self perceived fatigue and job satisfaction. Thus, a stress management program for the reduction of occupational stress, and the promotion of dental hygienist impact assessment health and quality of life is strongly recommended.

• The Journal of Pediatrics of Korean Medicine
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• v.31 no.3
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• pp.1-13
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• 2017

Objectives The purpose of this study is to investigate how irritable bowel syndrome (IBS) affects fatigue scales and eating habits in children and adolescents using Rome IV criteria. Methods Questionnaires and The $PedsQL^{TM}$ Multidimensional Fatigue Scale (MFS) have been given to 211 children and adolescents aged 8 to 18 years old who were admitted to ${\bigcirc}{\bigcirc}$ university Korean medicine hospital pediatric departments, from 29th, July, 2016 to 12th, August, 2016 to evaluate their eating habits and fatigue. Additionally, PASW statistics 18.0 were used to analyze influence of irritable bowel syndrome on eating habits and fatigue in children and adolescents by using chi-square test, independent t-test and linear regression. Results In total of 211 subjects, 29 (13.7%) were diagnosed with IBS according to the Rome IV criteria. 1. There was a statistically significant difference (p<0.05) between IBS group and non-IBS group on a specific question in the eating habit questionnaire: the amount of sugar intake and the prevalence of IBS. 2. There was a statistically significant difference in general fatigue and cognitive fatigue categories when comparing the MFS subscores according to the prevalence of IBS. Conclusions Considering patients eating habits and fatigue is a necessary process for the successful treatment of irritable bowel syndrome. Korean medicine that maximizes quality of life while minimizing the potential risks to the patients of gastrointestinal disease should also include administrative interventions that may be helpful in the daily life of IBS patients.

• Journal of Haehwa Medicine
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• v.20 no.2
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• pp.79-89
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• 2012

Objective : This study was conducted to evaluate of efficacy and safety of Vanadium Water (VW) on Cancer related Fatigue of Non-advanced Cancer Patients. Methods : Experimental Group Administration. Participants in treatment group consumed three 500 ml/bottle bottles of Jeju Island's VW, which contains 40.2 ${\mu}g/L$ of vanadium, three times a day (morning, afternoon, evening) for 4 weeks (28 days) without any additional treatments for fatigue improvement. The control group participants consumed three 500 ml/bottle bottles of ordinary water (0 ${\mu}g/L$ of vanadium) three times a day for the same period of time without any additional treatments for fatigue improvement. Results : After 4 weeks of VW consumption, total score of Revised Piper Fatigue Scale (RPFS) was reduced 30% and basal score after Fisher's Exact Test resulted statistical borderline significance (p=0.0799) and result of t-test of comparison between two groups' RPFS total score and fatigue cognitive/mood changes resulted statistical significance (p=0.0112). In detail, only 36.4% of control group (N=11) showed improvement while 77.8% of treatment group (N=9) showed fatigue improvement and thyroid hormone level changes. No other lab measures indicated any significant differences between two groups. Conclusion : Daily consumption of 1.5 L of Vanadium water for 4 weeks showed improvement of non-advanced cancer patients' fatigue.

• Korean Journal of Occupational Health Nursing
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• v.23 no.3
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• pp.171-179
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• 2014

Purpose: The purpose of this research was to provide baseline data by utilizing solutions to health problems caused by work-related stress and to examine a way of treatment by comparing and analyzing how the stresses link to fatigue and quality of researchers' life. Methods: A survey was conducted with 50 researchers working for in H research institute in Daejeon Metropolitan City from April 10th to May 10th, 2012 to examine the correlation of work stress, fatigue and quality of life. The data were analyzed using the Kruskal-Wallis test to look into examine the difference in work stress, fatigue, and quality of life. Also, the correlation of work stress, fatigue and quality of life was measured through by the Pearson correlation coefficient. The data collected through the questionnaires was were analyzed by SPSS 21.0 based on the significant level with a p-value, 0.05. Results: The results showed that fatigue was caused by work stresses in researchers and quality of life was ranked in a relatively low level. Correlation of work stresses, quality of life and fatigue and work stresses against mental health index was negative and fatigue against physical index was also negative. Conclusion: It is necessary to maintain more detailed provisions in order to improve mental health and stress level of researchers. Moreover, systematic, in-depth evaluation should be done to reduce researcher's work-related stress and fatigue. In addition, stress management and prevention program should be implemented for these researchers.

• Journal of the Korea Safety Management & Science
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• v.10 no.2
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• pp.15-24
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• 2008

This study was to investigate the relationship of VDT(visual display terminal) work condition and fatigue severity in the financial office workers. Questionnaires were completed by 662 persons in VDT workers of Post Office from January to May 2006. Multidimensional Fatigue Scale(MFS) that was developed in Korea Occupational Safety &Health Agency to estimate the degree of fatigue was used for study. In results, 149 persons(22.5%) in VDT workers were felt low fatigue severity, 351 workers(53.0%) were middle, and 162 workers (24.5%) were high. So it was appeared that one in four VDT workers felt the high fatigue severity. And woman VDT workers felt more fatigue severity than man. Also, fatigue severity was increased with increasing work time. Our findings suggest that VDT workers in financial office need proper health program to prevent occupational fatigue and disease.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.11 no.2
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• pp.220-225
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• 2004

Purpose: The purpose of this study was to test the reliability and validity of FAI and to apply it in Korea. Method: Data were collected from 180 middle-age women. The questionnaire, which was originally developed by Schwartz, Jandorf & Krupp, was analyzed using Cronbach's a and factor analysis. Results: Cronbach's a for the FAI was .9198. As a result of item analysis, 27 items were selected from the total of 29 items, Items that showed low correlation with the total scale were excluded. Six factors were fixed from the data analysis performed using principle component analysis and varimax rotation. These six factors account for 65.3% of total variance. The first factor was global fatigue severity, and the second one was fatigue consequences. The other factors were method of fatigue reduction, fatigue caused by exercise, fatigue caused by routine activity, and fatigue caused by stress and depression, sequentially. Conclusion: The reliability and validity of FAI were verified.