Annals of Occupational and Environmental Medicine

Radiodermatitis from Occupational Exposure to 192Ir: Kea Jeung Kim, Jae Hak Yoo; Korean Journal of Occupational and Environmental Medicine 1998;10(1):128-135. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.128

Portable gamma radiography for nondestructive testing with 192Ir is commonly used in various industrial fields to defect possible internal defects of metals in pipelines, tanks, bridges, ships and so forth in Korea. Compared to the numerous researches about biologic effects and potential risks of radiation, only a Jew papers were reported about radiodermatitis from occupational exposure to 192Ir. In this study, we investigated six patients with occupational radiodermatitis with developed during portable gamma radiography for nondestructive testing with 192Ir. All six patients had developed radiodermatitis on their hands and fingers. They noticed painful swelling, erythema, and bullae on their fingers or palms 1 to 2weeks after exposure. Three patients suffered from chronic fibrosis and recurrent ulcerations. We also discussed about the working situation of our patients and reviewed the literatures about the radiodermatitis from occupational exposure to 192Ir. In conclusion, we think ionizing radiation, though it is a useful tool in industry, must be carried out in accordance with radiation protection rules and regulations.

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Acute radiation syndrome in a non-destructive testing worker: a case report
Ji-Sung Ahn, Jai-Dong Moon, Wonyang Kang, Hyeong-Min Lim, Seunghyeon Cho, Dae-Young Lim, Won-Ju Park
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Ionizing Radiation-induced Diseases in Korea
Young-Woo Jin, Meeseon Jeong, Kieun Moon, Min-Heui Jo, Seong-Kyu Kang
Journal of Korean Medical Science.2010; 25(Suppl): S70. CrossRef

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Chronic Subdural Hematoma Due to Cumulative Trauma to the Head: Hyun Sul Lim, Cheol Jung, Doo hie Kim, Soo Keun Kim, Kuy Chun Lee; Korean Journal of Occupational and Environmental Medicine 1998;10(1):121-127. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.121

Abstract PDF: Chronic subdural hematoma usually occurs as a consequence of minor trauma. But, chronic subdural hematoma of occupational origin has not been reported yet in Korea. We experienced a case of chronic subdural hematoma induced by repeated trauma to the head. The patient was a 45-year-old male. He complained of repeated headache and nausea. By the computed tomogram, he diagnosed as chronic subdural hematoma and took the operation. He was not an alcoholism and had no intracranial disease nor coagulopathy. We studied all possibilities through working environment and personal environment survey. As a result, we decided the case as an example of cumulative trauma disorder to the head by occupational origin. We report a case of chronic subdural hematoma in the worker exposed repeated head trauma of occupational origin.

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Two Cases of Convulsion Associated With Caprolactam: Kuck Hyeun Woo, Sang Je Jung, Wan Seup Park, Hea Ryeon Shin, Jin Seok Kim, Sang Woo Kim; Korean Journal of Occupational and Environmental Medicine 1998;10(1):116-120. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.116

Abstract PDF: Two young men were seen with nausea, vomiting, dermatitis, seizure after two-four days of occupational exposure to caprolactam, a nylon fiber precursor. There were no significant results in laboratory test, brain CT, EEG except leukocytosis, hyperglycemia. Caprolactam has been shown to induce convulsive disorder in experimental animal studios and Tuma et al (1981) described that one worker acutely exposed to caprolactam developed generalized tonic-clonic seizure with leukocytosis. The coincidence of typical skin lesion with otherwise unexplained generalized tonic-clonic seizure in those young man strongly suggests that caprolactam was causal agent.

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A study on the Stress and Fatigue of Research Workers: Serk Hwan Kim, Gae Soo Yun; Korean Journal of Occupational and Environmental Medicine 1998;10(1):105-115. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.105

Abstract PDF

In order to investigate the relationship between stress and fatigue of research workers, we surveyed 246 research workers from September 15 to October 20, 1997. The results were as follows ; 1. Females, 20~29 years of ages, singles are associated with significantly higher stress symptoms and fatigue symptoms 2. The research workers who drink nearly everyday complained significantly lower stress symptoms and fatigue symptoms. 3. The research workers who excercise regularly complained significantly lower stress symptoms and fatigue symptoms. 4. The research workers who are somewhat satisfied by Job and income complained lower stress symptoms and fatigue symptoms. 5. The high risk stress group was 4.5 % of the research workers. The latent stress group was 93.9 % and healthy group was 1.6 %. The research workers belonged to high risk stress group complained significantly higher fatigue symptoms.

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Relationship between Job Stress and Fatigue Symptoms among Manufacturing Male Workers
Hu-Yeon Lee, Jong-Tae Baek, Young-Chae Cho
Journal of the Korea Academia-Industrial cooperation Society.2016; 17(7): 543. CrossRef
Correlation between Fatigue and Quality of Life Caused by Stress of Researchers' Work
Hye Joo Park, Yun Young Kim, Ki Hyun Park, Si Woo Lee, Jong-Hyang Yoo
Korean Journal of Occupational Health Nursing.2014; 23(3): 171. CrossRef
Fatigue and related factors among hotel workers: the effects of emotional labor and non-standard working hours
Ju Jong Lee, Hyun Jey Moon, Kyung-Jae Lee, Joo Ja Kim
Annals of Occupational and Environmental Medicine.2014;[Epub] CrossRef
Relationship Between the Psychosocial Factors and Job Stress Among Clerical Public Officers
Ho-Jin Park, Sung-Kyeong Park, Young-Chae Cho
Journal of the Korea Academia-Industrial cooperation Society.2014; 15(9): 5610. CrossRef
The Relationship between Anxiety, Anger and Fatigue among Stress factor of Nursing Students in Clinical Practice
San-Young Han, Young-Mee Lee
Journal of the Korea Academia-Industrial cooperation Society.2012; 13(2): 554. CrossRef
Stressors, coping resources and strategies, and police stress in South Korea
Merry Morash, Dae-Hoon Kwak, Vincent Hoffman, Chang Hun Lee, Sun Ho Cho, Byongook Moon
Journal of Criminal Justice.2008; 36(3): 231. CrossRef

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The Effect of Silica Dust on Ventilatory Function in Foundry Workers: Jung Wan Koo, Kyoung Ah Kim, Chee Kyung Chung; Korean Journal of Occupational and Environmental Medicine 1998;10(1):94-104. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.94

Abstract PDF: In order to study the exposure level of silica dust and the effects of silica dust on ventilatory function, respirable dust samples were collected by personal air samplers using NIOSH method 0500 from the selected foundry operations, and ventilatory function tests were performed on 209 male foundry workers and 239 male control subjects. Ventilatory indices such as forced vital capacity (FVC) , one-second forced expiratory volume (FEV1), ratio of FEV1 to FVC(FEV1 %), maximal mid-expiratory flow(MMF), peak expiratory flow rate (PEFR) and maximal expiratory flow at 25, 50 and 75 % of expired FVC (FEF25, FEF50, FEF75 were obtained by analyzing forced expiratory spirogram and maximal expiratory flow-volume curve which were simultaneously measured by Vitalography in standing position. The results were as follows : 1. The average quartz concentrations of respirable dust were the highest in melting operation (0.079 mg/m3) and followed by molding operation (0.051 mg/m3), finishing operation (0.041 mg/m3) and coremaking operation (0.023 mg/m3) in the descending order. 2. No significant differences for mean values of all ventilatory indices expressed as percent of predicted value were demonstrated between smokers and nonsmokers In foundry workers and control subjects. 3. Mean values of all ventilatory indices except FVC of foundry workers were significantly lower than those of control subjects. 4. Mean values of FEV1 %, MMF, FEF25, FEF50 and FEF75 expressed as percent of predicted value tended to decrease with increasing cumulative dust exposure. 5. In foundry workers, proportions of workers with low MMF, FEF50 and FEF75 were markedly higher than those with other indices, and were significantly increased with increasing cumulative dust exposure. 6. In foundry workers, 2 workers(1.0 %) were diagnosed as silicosis and the profusion of radiographic opacities were category 1/0 and q type. With the above considerations in mind, it suggested that increasing exposure of silica dust be associated with progressive deterioration in ventilatory function of an obstructive nature and that MMF, FEF50 and FEF75 be more sensitive indices in the detection of the early obstructive changes of air flow of workers exposed to silica dust.

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Evaluation of Dermal Measurement for Workers in Benzidine Dihydrochloride and Benzidine Based Dye Manufacturing Factory: Hye Kyeong Yeom, Jae Suk Song, Chi Nyon Kim, Jong Uk Won, Jaehoon Roh; Korean Journal of Occupational and Environmental Medicine 1998;10(1):83-94. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.83

Abstract PDF

This study is performed to evaluate usefulness of dermal measurement of benzidine and benzidine based dye as one of the occupational exposure assessment method for these compounds. We selected one benzidine manufacturing factory and one dye manufacturing factory in Incheon area. Eleven workers were for benzidine manufacturing factory and twenty four for dye. We analyzed relationships among air level, amount on skin and concentration of urinary metabolites for these compounds. Airborne levels of benzidine and dye were measured by NIOSH 5509, 5013 methods. Amount of these compounds on skin was measured with skin wipe method. Concentration of benzidine metabolites in urine was measured by High Performance Liquid Chromatography after alkaline hydrolysis. The amount of benzidine on hand skin was 25.05( - 233.2) ng/ur, and the amount of the neck was 2.01 ( - 11.9) ng/cm2 in the benzidine dihydrochloride manufacturing factory. The amount of benzidine on hand and neck skin has positive correlation with concentration of urinary monoacetyl benzidine (r=0.644, p < 0.05) . The amount of benzidine based dye on hand skin was 55.75( - 457.7) ng/cm2, and the amount of the neck skin was 18( - 284.7) ng/cm in benzidine based dye manufacturing factory The amount of dye on hand and neck skin has positive correlation with concentration of urinary benzidine for dye workers (r=0.467, p < 0.05). When assessing the exposure of workers who deal with benzidine, the amount of benzidine on skin should be measured for an accurate exposure assessment.

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A work-relatedness assessment in epidemiological case investigation of occupational cancers: II. Practice: an upper urinary tract cancer in a dyer
Kihun Kim, Hyeoncheol Oh, Jungwon Kim
Annals of Occupational and Environmental Medicine.2020;[Epub] CrossRef

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Quality Assessment of Group Occupational Health Service for Small and Medium Scale Enterprises in Korea: Sunmean Kim, Soo Hun Cho, Chang Yup Kim, Eun Hee Ha, Yun Chul Hong, Ho Jang Kwon, Mi Na Ha, Sang Hwan Han, Young Su Ju; Korean Journal of Occupational and Environmental Medicine 1998;10(1):71-82. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.71

Abstract PDF

Group occupational health service programme started in 1990 is one of the measures to cope with limited human and financial resources in occupational health. The programme has expanded rapidly to include 52 institutions, private as well as public, all over the country. In spite of its potential impact on health of employees and practice of occupational health in small and medium sized industries, comprehensive evaluation in terms of quality has not been tried. This study has aims to develop the criteria to assess the quality of newly developed group occupational health service programme, and to investigate the quality of institutions, and finally to develop policies for the quality improvement. 1) Criteria development : By defining occupational health services, in particular for small and medium sized industries, as one of the primary health care, followings are included as core elements of qualitative occupational health programme ; accessibility, continuity, comprehensiveness, technical quality, intersectoral collaboration, emphasis on preventive services, community participation, and adequacy. Again each element is divided into five major components of national health system infrastructure developed by the World Health Organization ; development of health resources, organized arrangement of resources, delivery of health care, economic support, and management. In turn, each component is categorized into three aspects of quality assessment, structure, process and outcome. Expert panel selected several criteria for each category to evaluate the programme. Criteria were modified according to each group of interviewees, to produce two sets of questionnaire, one for chief operating officer and another for nurses in the institutions, and the chief operating officer and workers in the workplace. 2) Subject : Of all 52 institutions, 25 voluntarily participated in the survey. At individual institution, chief operating officer and practicing nurses were interviewed in depth. After intensive education for interviewees, every interview was performed with standardized guideline and questionnaire. The quality of the 'Group occupational health service programme' was found to be lower than expected. Especially In continuity, comprehensiveness, technical quality, community participation and adequacy, lower quality in structural aspect was commonly identified throughout all the institutions. Quality in terms of accessibility and continuity highly varied among institutions. To improve quality of the programme, more comprehensive and systematic programme such as accreditation has to be introduced. In addition, human resources, governmental fund and information systems for individual workers are to be developed. As a long range plan, integration of occupational health services into the national health systems and pooling of financial resources and planned allocation should be considered.

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The roles of doctors, nurses, and industrial hygienists in the healthcare management services in Korea: a comparison of the opinions of specialized health management institutions and entrusted enterprises
Bo-Young Jang, Dong-Mug Kang, Young-Ki Kim, Se-Young Kim, Kyung-Sun Ko
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Relationship between occupational injuries and the provision of safety and health information: data from the 4th Korean working conditions survey
Ju-il Seo, Gab-Sik Shin, Min Gi Kim, Young-Sun Min
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Practice status of specialized agencies for occupational health management of small- to medium-size enterprises and the factors improving their performance: a cross-sectional survey study
Saerom Lee, Jun-Pyo Myong, Eun-A Kim, Huisu Eom, Bowha Choi, Young Joong Kang
Annals of Occupational and Environmental Medicine.2017;[Epub] CrossRef
Validation of Performance Indicators for Evaluation of Workplace Health Promotion
Seung Hee Ho, Young Moon Chae
American Journal of Health Promotion.2015; 29(6): 402. CrossRef

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A Survey for Worker's Satisfaction and Need of Occupational Health Service (OHS) in a Shipbuilding Industry: Eun Hee Ha; Korean Journal of Occupational and Environmental Medicine 1998;10(1):61-70. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.61

Abstract PDF: In order to make an effective occupational health service program in a shipbuilding industry, I surveyed the workers' recognition of current occupational health service provided in health department of the workplace, their satisfaction with it and their need of future service. During 4 months in 1995(from April 1st to July 31th) , structured questionnaires were administered to 680 participants in health education program in a shipbuilding industry in Inchon. Most of them were men. They were young workers of 20-29 years old and their work tenures were short(5 years or less). They knew that main activity of current OHS was treatment of disease in workplace, but their satisfaction with current OHS was not good. Their satisfaction with management of general diseases was high in the case of acute disease, namely, URI, diarrhea, abdominal pain, however their need of future service in general diseases was high in the case of chronic disease, namely, hepatitis, back pain and so on. Their concern of work related disease, their recognition of and satisfaction with preplacement medical examination was high, and they need more medical care of occupational disease. In working environmental management service, recognition of and satisfaction with the activities related to the personal protectives, safety management were high, and they need highly communication of environmental evaluation and improvement of working environment. The opinions of workers strongly showed the need of improvement in specific health examination and evaluation of work environment. Conclusively the workers were not satisfied with current in plant occupational health service. They wanted better services, especially in the medical care of occupational disease and the management of work environment.

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Assessment of Genotoxic Hazard in Petrochemical Workers: Jai Dong Moon, Soon Phal Suh, Jung Sun Park, Jin Hyung Cho, Ki Won Ahn; Korean Journal of Occupational and Environmental Medicine 1998;10(1):53-60. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.53

Abstract PDF

In order to evaluate the genotoxic hazard among workers potentially exposed to low level petrochemical substances, the analyses of micronuclei (MN) and sister chromatid exchanges (SCEs) in lymphocytes were performed in 46 male workers (as exposed group) and 46 nonexposed subjects (as control group). Mean frequencies of MN and SCEs (respectively, 12.9/1000 cells and 6.5/cell) in exposed group were very significantly higher than those (10.2/1000 cells and 5.4/cell) in control group. And there were also significant differences in mean frequencies of MN and SCEs adjusted for age, employment duration, smoking, and drinking between two groups. Median frequencies of MN and SCEs in exposed group were very significantly higher than those in control group. Frequencies of SCEs were higher in smokers than in non-smoker. Frequencies of MN in smokers, however, were similiar to those of non-smoker. Interaction between exposure and smoking on MN and SCEs induction was not observed. The results suggest that there is genotoxic hazard in high risk group like workers handling carcinogens in petrochemical plants and the analyses of MN and SCEs are useful biomarkers for the exposure to hazard substances even at the level below the exposure limit.

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Micronuclei assay: A potential biomonitoring protocol in occupational exposure studies
L. Palanikumar, N. Panneerselvam
Russian Journal of Genetics.2011; 47(9): 1033. CrossRef

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The Significance of Increased Signal Intensity in MR Imaging among Male Welders: Dong Mug Kang, Ho Chu Park, Hye Sook Son, Jun Han Park, Young Joon Lee; Korean Journal of Occupational and Environmental Medicine 1998;10(1):41-52. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.41

Abstract PDF

A purpose of present study is to provide basic information evaluating the utility of Magnetic Resonance imaging as a biological marker estimating manganese effects to central nervous system among welders, which is conducted by comparing urinary and blood manganese concentrations and signal intensities of brain MR images between exposed group and non-exposed group, evaluating the objectivity of subjective grading estimated by correlations between Pallidal signal intensity index (P. I) and subjective grades among exposed group, and comparing the difference of signal intensities according to presence of neurologic symptoms, signs and exposure variables among the exposed group. The exposed group is composed of 11 welders complaining severe symptoms or showing neurological signs, and the non-exposed group is composed of 5 patients who admitted a hospital. Urinary manganese concentrations and signal intensities in T1-weighted MR images among exposed group were higher than those of the non-exposed group significantly, which exhibits that increased signal intensities in T1-weighted MR image represent the effect of manganese exposure. P. Is among the exposed group revealed relatively high correlations with subjective grades ( gamma =0.63, p=0.037) , which suggests the objectivity of subjective grade. Signal intensity in globus pallidus was a suitable single variable representing the effect of manganese accumulation in C.N.S system appropriately, which was verified as follows ; Increased signal intensities among the exposed group had the highest frequency and intensity in the globus pallidus, and the P.I. had a relatively high correlation coefficient ( gamma 0.62, p=0.044) with total score of subjective grades. Signal intensity with subjective grading in globus pallidus represented very high correlation gamma =0.97, p=0.00) with total score of subjective grades, and had a similar correlation coefficient with many variables. It is hard to argue that signal intensities are markers representing pathologic change in C.N.S system or can be used as a diagnostic tool for manganese intoxication, because signal intensities had no difference between the exposed group and the non-exposed group according to presence of neurological signs.

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Occupational Neurological Disorders in Korea
Eun-A Kim, Seong-Kyu Kang
Journal of Korean Medical Science.2010; 25(Suppl): S26. CrossRef

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The Association of Job Characteristics and Stress Indicators in TV Manufacturing Plant Workers: Young Yeon Jung, Jong Young Lee, Kuk Hyeun Woo; Korean Journal of Occupational and Environmental Medicine 1998;10(1):29-40. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.29

Abstract PDF: This study was conducted to evaluate the association of job characteristics and stress indicators, from May 1st to 10th, 1996. The study population was 210 workers (clerical workers, 67; engineers, 82; assembly line workers, 61) engaged in a television manufacturing company. A questionnaire method was used to collect the data regarding to job demand, job control, behavioral type, life style and psychiatric symptoms. Clinical examination was conducted to measure blood pressure, serum cholesterol, fasting blood sugar and HbA1c. Percentage of high subjective job strain group was significantly higher in clerical workers(9.0 %) than in engineers(4.9 %) and in assembly line workers(3.3 %) (p < 0.01). Mean values of fasting blood sugar and HbA1c were significantly different between types of occupation and were the highest in clerical workers (p < 0.05). Significant association was found between perceived job characteristics and psychiatric symptom score (p < 0.01). The more job demand and the less job control was, the higher psychiatric symptom score was reported. Diastolic blood pressure was significantly related to job control (p < 0.05). The more job control was, the higher blood pressure was reported. In multiple regression analysis, job demand, job control and age were significant variables explaining the psychiatric symptoms and R2 was 0.23. Perceived job characteristics and type of occupation were not significant in explaining diastolic blood pressure and cholesterol. Type of occupation, job demand, age and BMI were significant variables explaining lasting blood sugar and R2 was 0.25. Type of occupation was the only significant variable explaining HbA1c and R2 was 0.07. According to this result, occupational type and subjective job characteristics must be considered in study of job stress. As a result of multiple analysis, subjective job characterics are significantly related to psychiatric symptoms and type of occupation is significantly related to fasting blood sugar and HbA1c.

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Clinical Application of Polymerase Chain Reaction for Diagnosis of Pulmonary Tuberculosis in Pneumoconiotic Patient: Jae Hee Park, Chul Jae Lim, Kyung Hye Lee; Korean Journal of Occupational and Environmental Medicine 1998;10(1):20-28. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.20

Abstract PDF: Recent development in thepolymerase chain reaction (PCR) has brought an extraordinary opportunity for the rapid detection of M. tuberculosis in clinical specimens for the diagnosis of tuberculosis. Pneumoconiosis is a sort of pulmonary fibrosis consequent to inhalation of the respirable dust. The association between pulmonary tuberculosis and pneumoconiosis is well recognized. There is a 10-fold increase in the tuberculosis risk among the workers who have pneumoconiosis demonstrated by chest roentgenogram. The physicians managing the patients with pneumoconiosis have to maintain a high index of suspicion for the development of mycobacterial infection, since the diagnosis of tuberculosis is often difficult. Mycobacterium tuberculosis is a very slow growing organism and acid-fast bacillus (AFB) staining frequently shows false negative results, and therefore PCR would be a very rapid, easy and sensitive diagnostic method for the diagnosis of Mycobacterium tuberculosis in pneumoconiotic patients. To compare the PCR method with the conventional methods in diagnosing Mycobacterium tuberculosis in sputum, we used the sputa of 115 pneumoconiosis patients in Munkyeong Cheil Hospital. Of 32 pulmonary tuberculosis in the pneumoconiosis patients, 29 were PCR positive and were higher than 28, 20 positive by culture and AFB stain. Overall sensitivity, specificity, and which were 90.6, 91.5 % respectively for the PCR assay, 87.5, 100 % for the culture method ; 62.5, 98.7 % for the AFB stain. The PCR assay is a rapid, efficient, sensitive method which can detect M. tuberculosis directly in pneumoconiosis patients, and further study should be followed for the development of the easier method.

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The Assessment of Worker's Health Status by SF-36: Bong Suk Cha, Sang Baek Koh, Sei Jin Chang, Jong Ku Park, Myung Guen Kang; Korean Journal of Occupational and Environmental Medicine 1998;10(1):9-19. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.9

Abstract PDF

This study was conducted to understand health status by general characteristic, and to find out relationship between social support and worker's health status. Health status was measured using SF-36(Medical Outcome Study Short Form 36), a 36 item self administered Instrument. The finding of this study were as follow; Mean scores of health status by sex were higher in male. The younger worker reported good health on physical functioning and role limitation-physical than did the older worker, but the older worker reported good health on social functioning and mental health. Mean scores of health status were higher in high income and white worker. When the relationship between social support and health status, social functioning, role limitation-emotion, mental health, vitality, general health were significantly related. Therefore we reviewed the evidence that socio-economic condition are associated with health status in this study, and that the strength of the social support was a important to maintain health.

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Ho Lee, Seong-yong Cho, Jin-seok Kim, Seong-yong Yoon, Bu-il Kim, Jong-min An, Ki-beom Kim
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Kyungeun Park, Sooyong Roh, Jihoon Lee, Soon Chan Kwon, Mihye Jeong, Soo-jin Lee
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Hyeok-Kyu Kwon, Hyun-Jin Do, Hye-Jung Kim, Seung-Won Oh, Youl-Lee Lym, Jae-Kyung Choi, Hee-Kyung Joh, Hyuk-Jung Kweon, Dong-Yung Cho
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Jin-young Lim, Jong Park, Myeong Geun Kang, So Yeon Ryu
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Effects of Shiftwork on Sleep Patterns of Nurses: S S Hwang, S B Hong, Y W Hwang, E J Hwang, J U Hwang, R G Hwang, H Y Hwang, J G Park, Y S Ju, S J Lee, J H Sung, D H Kang, S H Cho, D R Yun; Korean Journal of Occupational and Environmental Medicine 1998;10(1):1-8. Published online February 28, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.1.1

Abstract PDF

Industrialization has introduced various working systems into the modern society. Shiftwork is a good representative among those. So far various adverse health effects, possibly caused by this shiftwork, have mainly been reported in the fields of manufacturing industry by many other researchers , sleep disorders, gastrointestinal disorders and cardiovascular disorders and so on. These health effects were thought to be caused by the changes of circadian rhythm on shiftworking. This study was especially planned to evaluate effects of shiftwork on sleep disorders among shift-working medical manpower like hospital nurses, important persons dealings with lives, and ultimately to provide them with basic evidence for improving work environment. The study subjects were arbitrarily selected among shift-working female nurses and day-working female pharmacists in one university hospital in Seoul, and finally 79 nurses and 58 pharmacists were enrolled. The research was conducted by using self administered questionnaire, consisting of items about socio-behavioral factors including demographic factors which can affect sleep patterns and questions which make it possible to evaluate sleep disorders (e. g. sleeping duration, sleep latency, re-sleep latency, days of insomnia per week, drug use for sleep, and subjective symptoms). The result showed that the shiftworkers had significantly longer sleep and re-sleep latency, more days of insomnia, and a stronger likelihood of using drugs when they had sleep difficulty than day-working pharmacists. And the number of nightshift duties per month was discovered as the only significant predictor of sleep latency. Additionally, the subjective symptoms related to sleep disorders when awake and at work, showed negligible differences between the shiftworkers and dayworkers. In conclusion, we found shiftwork was risk factor for sleep disorders.

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Occupational Psychiatric Disorders in Korea
Kyeong-Sook Choi, Seong-Kyu Kang
Journal of Korean Medical Science.2010; 25(Suppl): S87. CrossRef

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