• Korean Journal of Psychosomatic Medicine
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• v.31 no.2
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• pp.149-154
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• 2023

Objectives : Far-infrared (FIR) lights have been investigated for sleep quality intervention. We sought to measure the advantageous effects of FIR in sleep using polysomnographic data as the objective outcomes. Methods : The ten healthy volunteers were enrolled in a single-center, prospective, patient-blind, single-arm trial. Individuals slept on a sham mattress and a FIR emitting mattress with polysomnography for one night each. Results : Sleep efficiency showed an increasing trend but was not statistically significant. PSQI-K significantly decreased (p=0.013). The latency to REM of the baseline was shorter than that of the intervention (p=0.008). Though there was no statistical significance, Stage N1 and N2 were shortened, and Stage N3 was prolonged after the intervention compared to the baseline. Conclusions : The FIR-emitting mattresses improved sleep quality on self-reported insomnia. We suggested the candidate for the markers altered by the FIR therapy, such as the normalization of REM latency and increased N3 sleep.

• Journal of Preventive Medicine and Public Health
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• v.56 no.5
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• pp.440-448
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• 2023

Objectives: The purpose of this study was to assess predictors of health-related quality of life (HRQoL) in elderly Asian American and non-Hispanic White cancer survivors. Methods: We conducted cross-sectional secondary data analyses using the combined datasets from the Surveillance, Epidemiology, and End Results program and the Medicare Health Outcomes Survey. Results: Elderly Asian American cancer survivors reported a lower mental HRQoL but a comparable physical HRQoL relative to elderly non-Hispanic White cancer survivors. Stress factors, such as comorbidities, difficulties with activities of daily living, and a history of depressive symptoms, along with coping resources like self-rated health and the ability to take the survey in English, were significantly associated with mental and physical HRQoL. Among elderly Asian American cancer survivors, a significantly lower mental HRQoL was observed among those taking the survey in the Chinese language. Conclusions: The findings suggest that race exerts a differential impact on HRQoL. Interventions should be designed to address the distinct cultural, linguistic, and systemic needs of elderly Asian American cancer survivors. Such an approach could assist in reducing cancer-related health disparities.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.23 no.3
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• pp.243-249
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• 2013

Objectives: This study assessed the status of domestic industrial hygiene laboratories using data from on-site investigation for revision of quality control systems in 2012-2013. Methods: The target laboratories were 60 industrial hygiene laboratories chosen by random selection and nationwide distribution which had participated in on-site investigations for revision of quality control systems from March 2012 to August 2013. The investigation was performed on-site following standard quality control procedures. The score between each group was compared using Mann-Whitney and Kruskal-Wallis tests, and the correlation between analytical career, sex, academic major of analyst and score of analytical performance was expressed as Spearman's rank correlation coefficient. Results: The assessment revealed that the items to be improved, in sequence, were effort at staff training (score 65.5), ability to calculate data (score 73.4), establishment of internal quality control guidelines (score 75.7), laboratory facilities (score 77.1), degree of understanding and skill at gas chromatography (score 77.1). Analysis performance showed a positive correlation with career of analyst (r=0.56, p<0.01). Conclusions: The practice of on-site investigation for quality control systems showed the current status of industrial hygiene laboratories in the first trial. There were many laboratories which needed improvement and development of analytical systems. This assessment can provide information for the systematic operation and improvement of facilities at each laboratory. Further practice of this investigation will lead to a proficiency testing and accreditation system for autonomous quality control as is the practice in many countries, rather than mandatory practice by legal regulation.

• Journal of Korean Society for Quality Management
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• v.51 no.2
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• pp.223-245
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• 2023

Purpose: This study aim to identify the trends in AI-based PHM technology that can enhance reliability and minimize costs. Furthermore, this research provides valuable guidelines for future studies in various industries Methods: In this study, I collected and selected AI-based PHM studies, established classification criteria, and analyzed research trends based on classified fields and techniques. Results: Analysis of 125 domestic studies revealed a greater emphasis on machinery in both diagnosis and prognosis, with more papers dedicated to diagnosis. various algorithms were employed, including CNN for image diagnosis and frequency analysis for signal data. LSTM was commonly used in prognosis for predicting failures and remaining life. Different industries, data types, and objectives required diverse AI techniques, with GAN used for data augmentation and GA for feature extraction. Conclusion: As studies on AI-based PHM continue to grow, selecting appropriate algorithms for data types and analysis purposes is essential. Thus, analyzing research trends in AI-based PHM is crucial for its rapid development.

• Nutrition Research and Practice
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• v.16 no.2
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• pp.248-259
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• 2022

BACKGROUND/OBJECTIVES: Adequate nutritional intake is essential for good health and well-being. We aimed to compare the nutrient intake from homemade meals, meals sourced externally ("eating out"), and meals from workplace foodservices, as well as the potential association between foodservices used and nutritional quality among adult Korean workers. SUBJECTS/METHODS: We used data from the Korea National Health and Nutrition Examination Survey, a nationwide cross-sectional survey on the health and nutritional status of the Korean population. Data from 6,845 workers aged 20-64 years were included. A survey on dietary behavior and nutrition was conducted using the 24-h dietary recall method. Nutritional quality was examined using the index of nutritional quality (INQ) score. Higher INQ scores reflected poorer nutritional quality, with insufficient intake of a higher number of nutrients. Multivariate linear regression was used to identify the association between the foodservices used and INQ scores after adjusting for other covariates. RESULTS: We found that foodservice users exhibited a higher 1-day intake of total energy and macronutrients (all P < 0.05) and lower INQ scores (P < 0.01) than non-users. The INQ scores for total daily meals decreased with the frequency of foodservice use (P < 0.01). A significant association was observed between the non-use of foodservices and INQ scores (β = 0.29, P < 0.01) after adjusting for other covariates. CONCLUSIONS: The use of workplace foodservices contributed to higher dietary nutritional quality among workers. This study highlights the importance of expanding the scope of workplace foodservices to promote higher nutritional quality and healthy dietary habits among workers.

• The Korean Journal of Health Service Management
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• v.11 no.2
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• pp.1-15
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• 2017

Objectives : This study aimed to identify the perception of quality improvement in health care and operational performance after the implementation of the Healthcare Accreditation. Methods : Data were collected from 5 hospitals that have experienced the 2th Healthcare Accreditation in Busan, South Korea. A Likert 5-point scale was used to measure the research variables and a structured questionnaire was used. Finally, 206 valid cases were analyzed using SPSS win 18.0. For hypothesis testing, hierarchical multiple regression analysis were performed. Results : The perception of quality improvement in health care after the implementation of the Healthcare Accreditation was higher than the operational performance. In the customer orientation and job performance, the perception of quality improvement in health care and operational performance had a significant influence. Conclusions : It is necessary to use the Healthcare Accreditation as a virtuous cycle of management that can ensure enforcement of workplace regulations and improve the members'ability to provide high quality medical services.

• The Journal of Korean Society for School & Community Health Education
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• v.15 no.2
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• pp.51-61
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• 2014

Objectives: This study examined the factors affecting the quality of life relating to oral health using OHIP-14 of college students. Also, this was to help college students to enhance their oral health. Methods: A Total of 334 self-administered questionnaires were collected from university student in Cheon-an. The statistical methods used for data analysis were the descriptive statistics, Independent samples t-test, One-way ANOVA, correlation analysis, multiple linear regression analysis. Results: First, A month pocket money and coffee consumption were significantly related to functional and physical Oral health foctor. Second, A month pocket money and coffee consumption were significantly related to Mental and social Oral health foctor. Finally, multiple linear regression analysis showed that a month pocket money, coffee consumption have a negative effect on the quality of life relating to oral health, Whereas an experience of oral health education a positive effect on this. Conclusion: Oral health related quality of life should be improved by investigating the factors affecting oral health and thus developing the program enhancing the oral health to prevent oral disease. In addition, in order to health promotion physical, mental, social, including the oral health, program development and research incessant must be carried out.

• Journal of Korean society of Dental Hygiene
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• v.16 no.3
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• pp.479-489
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• 2016

Objectives: The purpose of the study is to investigate the relationship between job stress and oral health-related quality of life in the blue collar workers. Methods: This study has been conducted with subjects of blue-collar workers who work in the industrial section located in Gyeongnam area from August 2013 to September 2013. Korean Occupational Stress Scale(KOSS-SF) and oral health impact profile(OHIP-14) were used as research tools. Data were analyzed by descriptive analysis, t-test, ANOVA, and multiple regression analysis. Results: Overall job stress and oral heal-related quality of life level of subjects were $57.32{\pm}8.03$ and $14.17{\pm}9.27$. The influential factors of oral heal-related quality of life of blue-collar workers were job demand, interpersonal conflict and organizational climate (subcategory of job stress), respectively. Conclusions: It is necessary to improve the better working condition for the oral health-related quality of life due to job stress in the blue collar workers.

• Quality Improvement in Health Care
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• v.17 no.1
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• pp.69-78
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• 2011

Objectives : The purpose of this study was to determine whether the published AMI report card could reduce in-patient mortality, 7-day after discharge mortality, and length of stay (LOS). Methods : Interrupted time-series intervention analysis was used to evaluate the impact of the report card for AMI care quality in November 2005 in terms of risk-adjusted in-patient mortality, risk-adjusted 7-day after discharge mortality, and DRGs case-mix LOS using the claim data of Health Insurance Review and Assessment Service. Results : Public disclosure of AMI care quality decreased risk-adjusted in-patient mortality and DRGs case-mix LOS by 0.00050% per month and 0.042 days per month respectively, however there was no effect on risk-adjusted 7-day after discharge mortality. Patterns of effect of public disclosure on AMI outcomes were a fluctuating pattern on risk-adjusted mortalities and a pulse impact for 1 month on DRGs case-mix LOS. Conclusions : We found the public disclosure of AMI care quality had decreasing effects on risk-adjusted in-patient mortality and DRGs case-mix LOS, but the size of the effect was marginal.

• Journal of Korean society of Dental Hygiene
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• v.16 no.2
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• pp.329-335
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• 2016

Objectives: The objective of study is to investigate the influence of service and value quality satisfaction on revisit intention in orthodontic patients. Methods: A self-reported questionnaire was filled out by 230 orthodontic patients in Seoul, Daejeon, and Cheongju from July 1 to August 30, 2015. The contents of questionnaire included the general characteristics(6 item), quality of dental service(22 item), value(4 item), revisit intention(3 item), and satisfaction(3 item). The research tools were modified and supplemented by Han using Likert 5 points scale. Data were analyzed using SPSS 19.0 program. Results: Quality of dental service was 3.88 points, value of dental service was 3.78 points, revisit intention was 4.06 points and satisfaction of dental service was 4.02 points. Conclusions: The quality of dental service was lower score than other scales. This results showed that it is necessary to increase the satisfaction in service quality in the orthodontic patients.