• Journal of Preventive Medicine and Public Health
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• 제22권4호
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• pp.486-494
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• 1989

Lead, iron, and zinc concentrations in whole blood were determined by atomic absorption spectrophotometry, using a simple one-step dilution procedure, which were measured in 3 groups, 98 officers unexposed to dust or to metal, 58 coal miners without pneumoconiosis, and 113 coal workers' pneumoconiosis (CWP) patients. The results were as follows : 1. The precisions (C. V.%) of lead, iron, and zinc in blood were $12.65{\pm}6.95%,\;1.47{\pm}1.25%\;and\;6.35{\pm}3.34%$, respectively. 2. Lead and zinc in blood showed the log-normal distribution unlike iron in blood which showed normal distribution. 3. Lead, iron, and zinc concentrations in blood of 3 groups were follows : There was significant difference of concentration for zinc in blood by groups statistically. 4. The difference of lead, iron, and zinc concentrations in blood was not significant (p>0.05) by profusion on chest radiographs.

• 대한물리의학회지
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• 제14권1호
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• pp.111-119
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• 2019

PURPOSE: The aim of this study was to determine how biofeedback training with Shaker exercise effects the activation of the cervical myocardial muscle in stroke with swallowing disorder. METHODS: From June 2018 to September 2018, 30 patients who were hospitalized at C hospital and K hospital in Daegu, and K hospital in Gumi were surveyed to meet the criteria for selection. The participants were classified into three groups, and Shaker exercise was applied three times a day, five times a week, for four weeks; visuoauditory biofeedback group (VABG), visual biofeedback group (VBG), and self-exercises group (SG). In addition, the suprahyoid muscle activity was performed three times (before intervention, after intervention, and after two weeks). RESULTS: The pre and post-test comparisons, revealed a significant difference between the three groups (p<.01); VABG had the highest suprahyoid muscle activity. The post-test and follow-up test produced similar results in, the three groups (p>.05). The mean comparison showed the smallest difference in VABG, indicating that muscle persistence was the best. CONCLUSION: Shaker exercise has an effect on suprahyoid muscle activation. Biofeedback training, which provides an input of multi-sensory information in swallowing disorder treatment is recommended because it has the greatest effect when combined with visuoauditory biofeedback.

• 한국환경보건학회지
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• 제38권3호
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• pp.195-203
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• 2012

Objectives: This paper aims to investigate the influence on stress hormones of job stress resulting from firefighting duties, as well as the degree of such influence. Methods: KOSS-26 and stress hormones such as norepinephrine (NE), epinephrine (EPI), adrenocorticotrophic hormone (ACTH), and cortisol were analyzed for 191 male firefighters from the western area of Incheon, the Incheon Industrial Complex, and Bucheon, Korea. Job stress and stress hormones were compared between a office working group and field-working group. Results: There was no significant difference in EPI and ACTH between the two groups. Change of stress hormones prior to engaging in typical duties, following typical duties, and immediately after field activities was examined. All the EPI, ACTH, and cortisol showed statistically significant changes with time, but not NE in the blood. In the field-working group, the cortisol levels in the blood of the firefighting and rescue groups showed notable differences depending on the time at which the measurements were taken. Conclusion: The differences in stress hormone levels depending on the type of duties of the firefighters were identified. Thus, interventions proper to job requirements is required in order to ease stress.

• 노동경제논집
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• 제24권2호
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• pp.35-62
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• 2001

본 연구에서는 한국노동연구원 패널조사(KLIPS)의 1차년도 자료를 이용해서 자녀의 최초 직업 및 현재 직업귀속을 결정하는 데 부모의 직업이 어떠한 영향을 미치고, 최초 직업이 현재의 직업귀속에 어떤 영향을 미치는가를 다항로짓분석을 이용해 살펴봄으로써 세대간 직업이동과 세내내 이동에 대해 분석하였다. 이 연구를 통해 세대간 직업이동에서 교육이 중요한 매개변수로 작용한다는 점, 각 직업집단마다 정도는 다르지만 현재의 직업귀속에 최초의 직업선택이 상당한 영향을 미친다는 점을 확인할 수 있었다. 또한 직업집단간 이동의 가능성이 어려운 정도로부터 고용주, 자영자 일부(상층), 사무직, 자영자 일부(하층), 생산직의 순으로 도시취업자 내부에 서열이 나타난다는 시사점을 얻었다. 정책적인 합의와 관련해서는 이미 세대간 직업이동에서 교육이 중요한 매개변수로 작용하고 있다는 점에서 사회이동을 활성화하기 위해서는 교육기회가 직업집단간에 달라지지 않도록 하는 방향으로 정책이 개발되어야 한다는 점을 발견할 수 있었다.

• 한국직업건강간호학회지
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• 제17권1호
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• pp.45-54
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• 2008

Purpose: This study was conducted to compare and estimate sleep patterns and health status of the shift and non-shift factory workers. Methods: The subjects of this study were 290 male workers in 13 companies, which manufacture automobile parts in Daegu, Korea. Survey data were collected from March 5th, 2007 to April 5th, 2007. PSQI was scored to check the quality of sleep, ESS for excessive daytime sleep disorder, ISI for insomnia, and SF-36 for health status. The data were analyzed by $X^2$ and t-test using SPSS 12.0 for windows. Results: There was a difference in quality of sleep patterns between shift and non-shift workers (p=.033). A difference in the pattern of excessive daytime sleep (P=.005) and in the degree of insomnia (p=.030) were observed between the two groups. However, there were no significant difference in health status between the two groups. Conclusion: Based on these results, shift workers are in need of careful and continuous monitoring regarding sleep disorders and we need to develop health promotion programs including sleep hygiene for shift workers.

• Asian Pacific Journal of Cancer Prevention
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• 제16권14호
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• pp.5607-5611
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• 2015

Thousands of people die each year from cancer due to occupational causes. To reduce cancer in workers, preventive strategies should be used in the high-risk workplace. The effective prevention of occupational cancer requires knowledge of carcinogen agents. Like other areas of healthcare industry, occupational health has been affected by information technology solutions to improve prevention, early detection, treatment and finally the efficiency and cost effectiveness of the healthcare system. Information technology solutions are thus an important issue in the healthcare field. Information about occupational cancer in information systems is important for policy makers, managers, physicians, patients and researchers; because examples that include high quality data about occupational cancer patients and occupational cancer causes are able to determine the worker groups which require special attention. As a result exposed workers who are vulnerable can undergo screening and be considered for preventive interventions.

• Safety and Health at Work
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• 제5권4호
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• pp.175-180
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• 2014

Wet-work can be defined as activities where workers have to immerse their hands in liquids for >2 hours per shift, or wear waterproof (occlusive) gloves for a corresponding amount of time, or wash their hands >20 times per shift. This review considers the recent literature on wet-work exposure, and examines wet-work as a main risk factor for developing irritant contact dermatitis of the hands. The aim of this paper is to provide a detailed description of wet-work exposure among specific occupational groups who extensively deal with water and other liquids in their occupations. Furthermore, it highlights the extent and importance of the subsequent adverse health effects caused by exposure to wet-work.

• Safety and Health at Work
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• 제13권2호
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• pp.135-140
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• 2022

Background: Coal mining is a hazardous industry. The purpose of the study is to identify the nature of occupational injuries and diseases among coal miners and to determine the factors that affect the rate of injury and duration of time loss from work. Methods: A retrospective cohort study was conducted using accepted workers' compensation claims data of 30,390 Australian coal miners between July 2003 and June 2017. Results: Musculoskeletal and fracture conditions accounted for approximately 60% of claims in all occupational groups. Cox regression analysis showed that older age and female gender were significant predictors of longer time off work. Injury types and occupations were associated with work time loss: mental health conditions, and machine operators and drivers had significantly longer durations of time off work. Conclusion: Future research can further address how these factors led to longer time off work so that coal industry regulators, employers, and healthcare providers can target interventions more effectively to these at-risk workers.

• Tuberculosis and Respiratory Diseases
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• 제39권2호
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• pp.131-140
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• 1992

유리규산과 자연산 석탄분진의 투여량과 관찰기간에 따른 폐조직과 hydroxyproline 량의 변화를 알아보기 위하여 대조군의 흰쥐에는 생리식염수 0.5ml를 기관지내에 주입하였고 실험군에는 생리식염수 0.5ml에 자연산석탄분진과 유리규산분진이 각각 10 mg, 30 mg, 50 mg씩 함유되도록 혼탁액을 만들어 이를 대조군과 같은 방법으로 주입한후 3주째와 20주째에 실험동물을 도살하여 젖은폐의 무게, 폐조직의 hydroxyproline량 그리고 폐의 조직학적 변화를 관찰한 바 아래와 같은 결과를 얻었다. 1) 자연산석탄분진 10 mg과 30 mg 투여군의 3주째를 제외한 모든 실험군의 젖은폐의 무게는 대조군에 비하여 유의하게 증가하였고(p<0.05), 유리규산 분진투여군에서는 20주째에 같은량의 자연산석탄분진을 투여한 군에 비하여 그리고 같은량의 유리규산분진을 투여한 군에서는 3주째에 비하여 20주째 젖은폐의 무게가 현저히 증가하였다(p<0.05). 2) 자연산석탄분진과 유리규산분진을 투여한 실험각군의 hydroxyproline 20주째에 대조군에 비하여, 그리고 동일한 분진의 같은량을 투여한 군에서는 3주째에 비하여 20주째 유의하게 증가하였으며(p<0.05), 유리규산분진 30 mg과 50 mg 투여군은 20주째에 같은량의 자연산석탄분진 투여한 군에 비하여 현저하게 증가하였다(p<0.05). 3) 분진의 투여량과 관찰기간이 같을때는 자연산석탄분진 투여군에 비하여 유리규산분진투여군에서 폐포간질과 폐포강내에 다형핵 백혈구, 섬유아세포, 대식세포가 증가하였고 폐포강내 삼출액이 관찰되었다. 진폐성결절은 3주째에 유리규산분진 30 mg과 50 mg 투여군에서만 관찰된 반면 20주째에는 모든 실험군에서 관찰되었다. 이상의 결과로 폐조직내 hydroxyproline 량의 증가와 진폐성 결절의 형성은 분진을 투여한 초기보다 후기에 현저하였고 자연산석탄분진보다 유리규산분진투여시 조기에 진폐증이 발생됨을 경험하였다.

• Safety and Health at Work
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• 제10권1호
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• pp.75-79
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• 2019

Background: Since the presence of a co-driver can be considered as a companion, partner, or friend for a driver through eliminating driver's loneliness, it plays a significant role in health and safety of drivers. The objective of this study was to investigate the effect of co-drivers on depression and occupational stress on male truck drivers. Methods: This study was an interventional case-control study. Seventy truck drivers were selected and divided into two groups: case (33 truck drivers with co-drivers) and control (37 truck drivers without codrivers). Two Goldberg depression inventories (for evaluating driver's depression) and the Karasek job content questionnaire (for evaluating driver's job stress) were used to collect data which were completed by interview. Results: The results showed that job content values for the case group were higher in all dimensions except job nature. The comparison of the percentages showed significant difference between two groups. Depression rate in drivers with co-driver is truly less than depression rate in drivers without co-driver. There was significant positive relationship between dimensions of job content and depression rate. Conclusion: According to the results of this study, it can be claimed that a co-driver decreases stress and loneliness of drivers, as well as increases work performance and job satisfaction, and, in turn, leads to a decrease in job-related depression.