Annals of Occupational and Environmental Medicine

Original Article

Association between sleep disturbance and occupational injury among Korean employees: Jongwoo Lee, Seong-Sik Cho, JungIl Kim, Mo-yeol Kang, Suhwan Ju, Byoung Gwon Kim, Young Seoub Hong; Ann Occup Environ Med 2021;33:e29. Published online September 10, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e29

Abstract Abstract in Korean PDF PubReader ePub

Background

Occupational injury has been a serious social problem steadily. Sleep disturbance is a risk factor for occupational injury. However, there were few researches studied on the linking between sleep disturbance and occupational injury in general working population of Korea. Therefore, we explored the association between sleep disturbance and occupational injury among Korean workers.

Methods

This study used data from the 5th Korean Working Conditions Survey. Occupational injury was assessed by asking work related injury for 12 months prior to the point of the survey. Sleep disturbance was assessed using the Minimal Insomnia Symptoms Scale (MISS). To analyze the association between sleep disturbance and occupational injury, multiple logistic regression analysis was conducted.

Results

The odds ratio (OR) of sleep disturbance group for occupational injury was 2.57 (95% confidence interval [CI]: 1.68–3.93) in the fully adjusted model. For the association between MISS score and occupational injury, it showed increasing trend that ORs increase from the 1st to the 4th quartiles. The OR of 2nd quartile was 1.10 (95% CI: 0.60–2.01), the OR of 3rd quartile was 2.27 (95% CI: 1.53–3.38) and the OR of 4th quartile was 2.80 (95% CI: 1.84–4.26).

Conclusions

Sleep disturbance was associated with occupational injury. In addition, increasing trend was observed between MISS score and occupational injury. These findings imply that developing of intervention programs to manage sleep disturbance and fatigue may be necessary to prevent occupational injury.

수면장애와 직업성 손상과의 연관성
목적
업무관련 손상은 심각한 사회적 문제이다. 그러나 한국에서 수면장애와 업무관련 손상의 연관성을 연구한 연구는 드물다. 따라서, 우리는 한국 근로자들의 수면 장애와 업무관련 손상 사이의 연관성을 조사하였다.
방법
이 연구는 제5차 한국 취업자 근로환경조사 자료를 활용했다. 업무관련 손상은 조사 시점의 1년 동안 업무관련 손상에 대해 질문함으로써 평가되었다. 수면 장애는 최소 불면증 증상 척도(MISS)를 사용하여 평가되었다. 수면 장애와 업무관련 손상 간의 연관성을 분석하기 위해 다중 로지스틱 회귀 분석을 수행하였다.
결과
보정된 모델에서 수면 장애 그룹의 오즈비는 2.57(95% CI: 1.68 - 3.93)이었다. 수면 장애의 정도와 업무관련 손상 사이의 연관성에 대해서는 오즈비가 1 사분위수에서 4 사분위로 증가한다는 노출(용량)-반응 관계를 보였다. 2분위수의 오즈비는 1.10(95% CI: 0.60–2.01)이었고, 3분위수의 오즈비는 2.27(95% CI: 1.53–3.38)이었으며, 4분위수의 오즈비는 2.80(95% CI: 1.84–4.26)이었다.
결론
수면 장애는 업무관련 손상과 관련이 있다. 또한, 수면 장애의 심각성과 업무관련 손상 사이에 노출-반응 관계가 관찰되었다. 이러한 연구 결과는 이후 전향적 코호트 형태의 연구가 필요하며, 업무관련 손상을 방지하기 위해 수면 장애와 피로를 관리하기 위한 개입 프로그램의 도입이 필요할 수 있음을 시사한다.

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Research Articles

Association between employment status and sickness presenteeism among Korean employees: a cross-sectional study: Jeong Woo Park, Seong Sik Cho, JongWoo Lee, Jonghyun Hwang, Jung Il Kim, Byoung Gwon Kim, Young Seoub Hong; Ann Occup Environ Med 2020;32:e17. Published online June 12, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e17

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Background

Sickness presenteeism (SP) indicates “going to work while being ill.” The importance of SP has only recently been investigated, and the association between SP and employment status has been inconsistent across studies. Therefore, we conducted this study to explore the association between SP and employment status by using presenteeism propensity (PP), which can reflect the individual decision-making process.

Methods

The study population included employees participating in the 5th Korean Working Condition Survey. We analyzed data of only employees with at least one health event, which was calculated as the sum of SP and sickness absenteeism days. Employment status was grouped into 3 categories: stable employment, unstable employment (contract period ≥ 1 year), and unstable employment (contract period < 1 year). Survey-weighted logistic regression analysis was conducted to assess the association between employment status and PP (dichotomized as “≤ 0.5” and “> 0.5”).

Results

Unstable employees (contract period ≥ 1 year) had higher odds of PP than stable employees (odds ratio [OR]: 1.23, 95% confidence interval [CI]: 1.03–1.47), whereas unstable employees (contract period < 1 year) had lower odds of PP than stable employees (OR: 0.82, 95% CI: 0.71–0.96).

Conclusions

Employment status was associated with SP. Given the negative health impact of SP, social efforts, such as paid sick leave, are required to reduce SP and enhance the health status of unstable workers.

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A study of relationship between blood mercury concentration and hypertension in residents living in old mine fields and related factors: Jeong Woo Kim, Byoung Gwon Kim, Jeong Woo Park, Jong Woo Yi, Jung Il Kim, Young Seoub Hong; Ann Occup Environ Med 2019;31:e6. Published online May 30, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e6

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Background

In Korea, around the abandoned metal mines, heavy metals are being accumulating in the cultivated areas. Among exposed heavy metals, mercury is known to harm for cardiovascular system known to affect blood pressure. So, we studied the relationship between blood mercury level and hypertension in residents around abandoned metal mines.

Methods

From 2008 to 2011, we surveyed 7,055 residents in provinces affected by abandoned metal mines and collected data from 6 Hospitals. We conducted a personal questionnaire interview survey with residents on the basis of household questionnaires, sex, age, household income, smoking, and drinking items. Multiple logistic regression analysis was performed to investigate the association between blood mercury level and hypertension.

Results

We compared residents with low and high groups based on blood mercury level 5.8 μg/L, and higher group was significantly higher risk of hypertension than lower group (odds ratio [OR]: 1.277; 95% confidence interval [CI]: 1.135–1.436), also in adjusted model, higher group was significantly higher risk of hypertension than lower group (OR: 1.276; 95% CI: 1.117–1.457).

Conclusions

This study showed a significant correlation between mercury and hypertension in residents around abandoned metal mines. Therefore, we should continuously monitor people who are higher than the standard value and the hypertensive patients.

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A cross-sectional study on the pulmonary function of residents in two urban areas with different PM₁₀ concentrations: data from the fourth Korea national health and nutrition examination survey (KNHANES) 2007–2009: Si Woo Park, Byoung Gwon Kim, Jung Woo Kim, Jung Woo Park, Jung Il Kim; Ann Occup Environ Med 2018;30:47. Published online July 16, 2018; DOI: https://doi.org/10.1186/s40557-018-0258-4

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Background

The present study aims to compare the pulmonary function of residents of Seoul special city (Seoul) and Jeju special self-governing province including Jeju city and Seogwipo city (Jeju), characterized by vastly different annual average airborne particulate matter with an aerodynamic diameter less ≤10 μm (PM₁₀) concentrations, with the annual average PM₁₀ concentration in Seoul being significantly higher than that in Jeju.

Methods

This cross-sectional study analyzed the pulmonary function test results and sociodemographic data of Korean adults ≥19 years of age derived from the 4th KNHANES, 2007–2009. A total of 830 individuals residing in Seoul or Jeju were included in this study. T-tests were used to analyze predicted values of forced expiratory volume in 1 sec (FEV1p), predicted values of forced vital capacity (FVCp) and FEV1/FVC ratio (FEV1/FVC), as dependent variables, to examine the differences in the subjects’ pulmonary function according to the city of residence. Stratified analysis was then performed to adjust for variables potentially affecting pulmonary function. The analysis was performed on subjects as a group and also following stratification according to sex and other variables.

Results

Seoul residents had a significantly lower FVCp than that of the Jeju residents (difference: 3.48%, p = 0.002). FEV1p, FVCp and FEV1/FVC of male Seoul residents were significantly lower than those of male Jeju residents (difference: 6.99, 5.11% and 0.03, respectively; p < 0.001, p = 0.001, p = 0.001). In male subjects, statistically significant results were obtained even after adjusting the influence of other variables through stratified analysis.

Conclusion

The present analysis was based on cross-sectional data collected at one point in time. Therefore, unlike longitudinal studies, it does not establish a clear causal association between the variables. Nevertheless, this study found that pulmonary function among subjects residing in Seoul was significantly decreased compared to that of subjects residing in Jeju.

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A study on the relationship between job stress and nicotine dependence in Korean workers: Seung Rak Son, Byeong Moo Choe, Seong Hwan Kim, Young Seoub Hong, Byoung Gwon Kim; Ann Occup Environ Med 2016;28:27. Published online June 10, 2016; DOI: https://doi.org/10.1186/s40557-016-0113-4

Abstract PDF PubReader ePub

Background

Nicotine dependence and its severity are often determined by individuals’ psychosocial factors.This study purposed to analyze how Korean workers’ job stress is related with their nicotine dependence according to demographic and occupational characteristics in order to reduce smoking related to job stress and to establish objective indicators to be used in developing adequate smoking cessation strategies.

Methods

The subjects of this study were 4,639 workers who replied to the questionnaire survey. In addition, 1,948 current smokers were separated from non-smokers and ex-smokers, and the relationship between job stress and nicotine dependence was analyzed with the current smoker group. Nicotine dependence was tested using Fagerström’s Test of Nicotine Dependence, and stress was measured using a questionnaire on subjective stress felt by workers in their daily life and the short form of the Korean Occupational Stress Scale.

Results

The smoking rate was 54.1 % among men and 2.5 % among women. Nicotine dependence was significantly different according to interpersonal conflict, organization system and lack of reward (p < 0.05). As multivariate logistic analysis, job control, occupational climate and total stress score were statistical significant (p < 0.05).

Conclusions

Job stress was found to be related with smoking status and nicotine dependence. Based on this result, it is suggested to enhance workers’ welfare for health promotion in workplace by improving their working environment in order to reduce job stress and consequently to decrease the smoking rate.

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Review

Multiple Chemical Sensitivity: Hong Jae Chae, Byoung Gwon Kim, Hwan Cheol Kim, Mi Young Lee, Jong Han Leem; Korean Journal of Occupational and Environmental Medicine 2012;24(4):328-338. Published online December 31, 2012; DOI: https://doi.org/10.35371/kjoem.2012.24.4.328

Abstract PDF

This article reviews newly available knowledge on multiple chemical sensitivity (MCS), a chronic medical condition characterized by symptoms in multiple organ and caused by exposure to low levels of common chemicals. Although various pathophysiological models have been proposed (including toxicological, immunological or behavioral models), the causes and underlying mechanisms of MCS are still not fully understood. Most patients with MCS were women between the ages of 30 and 50 years. The most frequently reported trigger was a newly constructed home or job site. The common symptoms are vague, non-specific complaints: fatigue, difficulty concentrating, poor memory, sneezing/runny nose, headache, and muscle pain. There are no laboratory markers or specific investigative findings for MCS. The Quick Environmental Exposure and Sensitivity Inventory (QEESI)(c) has been used as a screening questionnaire. Treatment focuses on assisting patients at the earliest possible opportunity to reduce their exposure to unique symptom triggers and known hazardous chemicals. Early comprehensive assessment, medical management, and social and financial support might avoid the deterioration of functions associated with prolonged illness.

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Original Article

Blood and Urinary Cadmium Concentration of Residents around Abandoned Metal Mines in Busan and Gyeongsangnam-do: Hyo Jun Kim, Byoung Gwon Kim, Dae Seon Kim, Jeong Wook Seo, Byeng Chul Yu, Young Wook Kim, Young Seoub Hong; Korean Journal of Occupational and Environmental Medicine 2010;22(1):1-10. Published online March 31, 2010; DOI: https://doi.org/10.35371/kjoem.2010.22.1.1

Abstract PDF

OBJECTIVES
To evaluate the blood and urinary cadmium concentration levels of around abandoned metal mines in comparison with a control group.
METHODS
Blood and urinary cadmium concentration levels were analyzed through investigations of the dietary habits and dietary water of subjects living near abandoned metal mines (exposure group) (n=190) in comparison with those living in designated control areas (control group) (n=256).
RESULTS
The blood cadmium (1.93 microgram/l) and urinary cadmium (2.41 microgram/g cr) concentrations of the exposure group were significantly higher than those of the control group (blood cadmium: 1.19 microgram/l, urinary cadmium: 1.94 microgram/g cr). Both concentrations were significantly higher in vegetarians in both groups.
CONCLUSIONS
The exposure group had higher blood and urinary cadmium concentrations than the control group. We attributed the elevated blood and urine cadmium levels in the abandoned mine residents to the influence of the abandoned mine sites.

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Case Report

A Case of Occupational Asthma and Rhinitis Suspected to be Caused by Exposure to Ethyl Cyanoacrylate: Soon Woo Jang, Ki Chul Nam, Hyung Joon Jhun, Byoung Gwon Kim, Jong Tae Park; Korean Journal of Occupational and Environmental Medicine 2009;21(3):283-288. Published online September 30, 2009; DOI: https://doi.org/10.35371/kjoem.2009.21.3.283

Abstract PDF: BACKGROUND
Ethyl cyanoacrylate is used as a component of adhesives used in the industrial, domestic, and medical fields. It is known to cause mucosal irritation, contact dermatitis and respiratory discomfort. However, reports of combined occupational asthma and rhinitis are rare, especially in Korea. We report a case of occupational asthma and rhinitis suspected to be caused by exposure to ethyl cyanoacrylate.
CASE
REPORT: A 36-year-old woman presented with rhinorrhea, cough, dyspnea and chest discomfort after exposure to ethyl cyanoacrylate adhesive at an assembly area of a plastic products manufacturing company. Nasal endoscopy revealed watery rhinorrhea and hypertrophy of nasal turbinates, which were compatible with rhinitis. The methacholine provocation test showed a positive result. Daily variability of peak expiratory flow increased on work days, but decreased during non-work days. Based on these findings, we diagnosed this case as a combination of occupational asthma and rhinitis suspected to be caused by exposure to ethyl cyanoacrylate.
CONCLUSION
There needs to be increased awareness regarding occupational asth-ma and rhinitis caused by exposure to ethyl cyanoacrylate.

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Original Article

Association between Job Stress and Alexithymic Traits: Seong Jin Ryu, Ja Hyun Kim, Soon Woo Jang, Hyung Joon Jhun, Byoung Gwon Kim, Jong Tae Park; Korean Journal of Occupational and Environmental Medicine 2008;20(4):295-301. Published online December 31, 2008; DOI: https://doi.org/10.35371/kjoem.2008.20.4.295

Abstract PDF

OBJECTIVES
We evaluated the association between job stress and alexithymic traits in Korean workers.
METHODS
Workers (n=521) who visited two university hospitals for medical check-ups were recruited for this study. Job stress was evaluated using the Korean version of Karasek's Job Content Questionnaire (JCQ), and alexithymic traits were assessed using the Korean version of the Toronto Alexithymia Scale (TAS-20K). Crude and adjusted odds ratios (ORs) of job stress scales (job strain, job insecurity, and job dissatisfaction) with alexithymic traits(total TAS score > or =52) were calculated.
RESULTS
High job strain compared with low strain had a high, but insignificant association with alexithymic traits (adjusted OR, 2.26; 95% CI, 0.93-5.44). High job insecurity (adjusted OR, 2.26; 95% CI, 1.21-4.22), and high job dissatisfaction (adjusted OR, 1.99; 95% CI, 1.06-3.74) had significant associations with alexithymic traits.
CONCLUSIONS
This study suggests that job stress is associated with alexithymic traits in workers.

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Retraction Notice to: "Association between Job Stress and Alexithymic Traits" [Korean J Occup Environ Med 20(4) (2008) 295-301] and "Estimated Number of Korean Workers with Back Pain and Population-based Associated Factors of Back Pain: Data from the Four

Korean Journal of Occupational and Environmental Medicine.2011; 23(3): 350. CrossRef

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Case Report

A Case of Trichloroethylene Intoxication with Neuropsychiatric Symptoms: Ja Hyun Kim, Seong Jin Ryu, Byoung Gwon Kim, Hyung Joon Jhun, Jong Tae Park, Hae Joon Kim; Korean Journal of Occupational and Environmental Medicine 2008;20(1):54-61. Published online March 31, 2008; DOI: https://doi.org/10.35371/kjoem.2008.20.1.54

Abstract PDF

BACKGROUND
Trichloroethylene (TCE) has been widely used as a typewriter correction fluid, paint remover, adhesive, spot removers and, particularly, as a degreasing agent in metal-fabricating operation. However, few studies have reported on the effects of TCE intoxication, in spite of numerous occupational accidents arising from TCE intoxication, even until quite recently used in small companies. TCE affects mainly the central nervous system (CNS) and is carcinogenic, even when carefully used and managed.
CASE
REPORT: A 48-year-old male worker visited our hospital complaining of decreased motivation and general weakness. In history taking, the patient had suffered insomnia, memory disturbance, stuttering, loss of interest and sexual desire, depressive mood for 4 years, dysesthesia with tingling sensation and pain in both extremities, and a nauseas feeling similar to a hangover which had been aggravated for 4 months before admission. The patient had been engaged in metal degreasing with TCE for 8 years. Electromyography indicated disturbance of autonomic function, but there was neither peripheral neuropathy nor cervical radiculopathy. Organic abnormalities including cerebellar atrophy and CNS infection were ruled out, while there was no indication of malignancy in magnetic resonance imaging (MRI) and metabolic disorders and electrolyte imbalances in laboratory test. The authors performed biological monitoring for the possible exposed chemicals. Urinary 2,5-hexanedione, a metabolite of n-hexane, was undetected but 3,331.1 mg/g creatinine of urinary trichloro-compounds, a metabolite of TCE, was detected. The patient was diagnosed as TCE intoxication due to a level of urinary trichloro-compounds in excess of the normal range (300 mg/g creatinine), in addition to an occupational history and clinical symptoms. TCE exposure was stopped in admission and the neuropsychiatric symptoms of the patient were improved as the urinary trichloro-compounds were decreased from 3,331.1 mg/g creatinine to 64.6 mg/g creatinine in 5 days.
CONCLUSION
Low-dose, chronic TCE intoxication shows neuropsychiatric symptoms, which are often misrecognized merely as a psychiatric disorder; its appropriate diagnosis, early treatment and exposure assessment are therefore difficult. The neuropsychiatric symptoms in workers who have been exposed to TCE should be monitored, detailed job history should be taken and biological monitoring should be conducted to gain early insight of chronic TCE exposure.

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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
Occupational Neurologic Disorders in Korea
Yangho Kim, Kyoung Sook Jeong, Yong-Hun Yun, Myoung-Soon Oh
Journal of Clinical Neurology.2010; 6(2): 64. CrossRef
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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Original Articles

Factors Affecting the Health Promotion Activities of Workers: Eun Kyoung Kim, Byoung Gwon Kim, Jong Tae Park, Hyoung Ryoul Kim, Jung Wan Koo; Korean Journal of Occupational and Environmental Medicine 2007;19(1):56-64. Published online March 31, 2007; DOI: https://doi.org/10.35371/kjoem.2007.19.1.56

Abstract PDF

OBJECTIVE: The aim of this paper was to develop efficient and practical health promotion strategies in the workplace by investigating both the present status of health promotion and the barriers to its practice.
METHODS
A questionnaire was administered to 20% of industrial workers in the workplaces which receives the health care agency enterprise or are supported by a grant from the national treasury, K University Hospital in Gyeong-Gi province, and C University Hospital in Seoul.
RESULTS
According to the questionnaire survey, 51.3% workers were practicing health promotion activities and smoking cessation was the most common method among them. Regarding the factors that prompt workers to commence health promotion activities, TV or the mass media had a 33.4% effect, followed by a 22.1% effect for an abnormal finding at regular health screening. The most necessary health promotion activity in the workplace was exercise (41.9%), followed by stress management. When asked about their expectations of the health promotion program, 84.8% of the respondents answered that they expected it to be significantly or somewhat effective. Factors affecting the health promotion activities of workers were worker's health status and job control.
CONCLUSIONS
This study demonstrated that workers evaluate health promotion activities positively and that some workers are unable to participate in these activities despite their willingness to do so due to the barrier of circumstances. To encourage worker's participation, the government and employers should remove barriers.

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Comparison of Occupational Health Providers' Perception on Workers' Health Promotion Program by Business Types: Focusing on Need, Necessity, Performance, Barriers, and Effectiveness of Program
Young-Im Kim, Bokim Lee
Korean Journal of Occupational Health Nursing.2016; 25(1): 29. CrossRef
Influence on Health Promotion Behavior among Government-funded Research Institute's Employee according to Perceptive Health Status and Social Support
Ji Hyun Kim, Sook Kyoung Park
Korean Journal of Occupational Health Nursing.2015; 24(4): 270. CrossRef
Colorectal Cancer Screening in Korean Workers
Su Ho Park, Gwang Suk Kim
Cancer Nursing.2014; 37(4): 278. CrossRef
Relationships among Self Efficacy, Social Support, and Health Promoting Behaviors in Correctional Officers
Yeongmi Ha, Hyunkyung Choi
Korean Journal of Occupational Health Nursing.2014; 23(3): 163. CrossRef
Knowledge of hepatitis A, Health Perception and Health Promoting Behavior among young and middle-age adults
Kyeong-Sook Cha, Yang-Sook Yoo, Ok-Hee Cho
Journal of Korean Public Health Nursing.2014; 28(2): 298. CrossRef
Impact of the oral health-related quality of life(OHIP-14) of industrial workers in some area
Hye-Won Cheon
Journal of Korean society of Dental Hygiene.2014; 14(6): 859. CrossRef
A Study on Gender Differences in Influencing Factors of Office Workers' Physical Activity
Duck Hee Chae, Su Hee Kim, Chung Yul Lee
Journal of Korean Academy of Community Health Nursing.2013; 24(3): 273. CrossRef
Factors Associated with Cancer Screening Rates of Manufacturing Workers
Su Ho Park, Chang Hee Kim, Eun Kyung Kim
Korean Journal of Occupational Health Nursing.2013; 22(3): 179. CrossRef
Factors Associated with Colorectal Cancer Screening of Blue-Color Workers
Su Ho Park, Gwang Suk Kim, Jong Uk Won, Chang Gi Park
Asian Oncology Nursing.2012; 12(2): 166. CrossRef
Effect Factors on Health Promotion Lifestyle of Shift Work Nurses
Young-Im Kim
Korean Journal of Occupational Health Nursing.2011; 20(3): 356. CrossRef
Health Behaviors by Job Stress Level in Large-Sized Company with Male and Female Workers
Hyunju Park, Hye-Sun Jung
Journal of Korean Academy of Nursing.2010; 40(6): 852. CrossRef

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Pneumonitis by Methylene Chloride: Kyu jin Chang, Jong tae Park, Eun kyoung Kim, Byoung gwon Kim, Hae joon Kim; Korean Journal of Occupational and Environmental Medicine 2005;17(4):365-371. Published online December 31, 2005; DOI: https://doi.org/10.35371/kjoem.2005.17.4.365

Abstract PDF: OBJECTIVES
The authors report a case of pneumonitis caused by methylene chloride (MC).
METHODS
The patient was examined and diagnosed by clinical, radiologic, laboratorial and medical evaluation. The concentration of MC in the factory was measured to determine the exposure level.
RESULTS
The patient had an infiltration in chest X-ray, which underwent rapid relief of radiological finding, respiratory acidosis and hypoxemia in arterial blood gas analysis, and a ground-glass opacity in high resolution computerized tomography. MC was the only exposed chemical compound in this case. The concentration of MC was 39.9 ppm in the factory.
CONCLUSIONS
We diagnosed this to be a case of pneumonitis by MC based on clinical laboratory findings, exposure history to MC and MC concentration in the factory.

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