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 Article

Workers’ experiences with compensated sick leave due to musculoskeletal disorder: a qualitative study: Min Choi, Hyoung-Ryoul Kim, Jinwoo Lee, Hye-Eun Lee, Junsu Byun, Jong Uk Won; Ann Occup Environ Med 2014;26:33-33. Published online November 4, 2014; DOI: https://doi.org/10.1186/s40557-014-0033-0

Abstract PDF PubReader ePub

Objectives

The most common occupational disease that is compensated by Industrial Accident Compensation Insurance (IACI) in Korea is musculoskeletal disease (MSD). Although complaints about the workers’ compensation system have been raised by injured workers with MSD, studies that examine workers’ experiences with the Korean system are rare. This paper is a qualitative study designed to examine injured workers’ experiences with the workers’ compensation system in Korea. The aim of this study is to explore the drawbacks of the workers’ compensation system and to suggest ways to improve this system.

Methods

All workers from an automobile parts factory in Anseong, GyeongGi province who were compensated for MSD by IACI from January 2003 to August 2013 were invited to participate. Among these 153 workers, 142 workers completed the study. Semi-structured open-ended interviews and questionnaires were administered by occupational physicians. The responses of 131 workers were analyzed after excluding 11 workers, 7 of whom provided incomplete answers and 4 of whom were compensated by accidental injury. Based on their age, disease, department of employment, and compensation time, 16 of these 131 workers were invited to participate in an individual in-depth interview. In-depth interviews were conducted by one of 3 occupational physicians until the interview contents were saturated.

Results

Injured workers with MSD reported that the workers’ compensation system was intimidating. These workers suffered more emotional distress than physical illness due to the workers’ compensation system. Injured workers reported that they were treated inadequately and remained isolated for most of the recuperation period. The compensation period was terminated without ample guidance or a plan for an appropriate rehabilitation process.

Conclusions

Interventions to alleviate the negative experiences of injured workers, including quality control of the medical care institutions and provisions for mental and psychological care for injured workers, are needed to help injured workers return to work earlier and more healthy.

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Review

The Status of Occupational Accidents and Injuries and the Implications: Seong Kyu Kang; Korean Journal of Occupational and Environmental Medicine 2011;23(4):351-359. Published online December 31, 2011; DOI: https://doi.org/10.35371/kjoem.2011.23.4.351

Abstract PDF

Since 1964, when the official statistics on occupational injury rates had been produced for the first time, the rates have showed a steady decline until 2000. However, the injury rate has been stagnant since 2000 although the fatal injury rate has decreased 40% in the same period. The non-fatal injury rate per 100 employees was 0.63 while the fatal injury rate per 100,000 employees was 9.74 in 2010. Traumatic injuries accounted for 86.8% of all injuries, followed by non-traumatic injuries at 8.4% and injuries by traffic accidents at 4.6%. Injuries caused by being caught in objects, hit by flying or falling objects and collisions have decreased while those caused by slip and fall on same level and fall from the height have increased. The decrease in injuries caused by being caught in objects may be the result of prevention efforts because 68.6% of them occurred in the manufacturing industry where most efforts for prevention have been invested. The increase in injuries involving slips and falls on same level may be caused by the growing number of employees in the service industry where 51% of the cases occurred. The construction industry accounted for 40.2% of all fatal injuries, and falls from the height caused 54.3% of the fatality. The non-fatal injury rate of Korea is lower than that of industrialized countries while its fatal injury rate is comparatively higher. It is probably caused by many unclaimed cases of mild non-fatal injuries whereas most fatal injuries were filed. Another problem is that the injury rate does not include injuries that occur to workers who are not eligible for the compensation scheme. This information can be obtained through a surveillance system or the national survey. Therefore, the attention of occupational physicians should focus on injuries as well as diseases occurring at work, and also on all working population whose injuries and diseases are not covered by the compensation scheme.

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Original Article

Factors Associated with Occupational Injuries of Ship-building Supply Workers in Busan: Seung Hwan Shin, Dae Hwan Kim, Jin Hong Ahn, Hwi Dong Kim, Jeong Ho Kim, Hyun Man Kang, Jong Tae Lee; Korean Journal of Occupational and Environmental Medicine 2008;20(1):15-24. Published online March 31, 2008; DOI: https://doi.org/10.35371/kjoem.2008.20.1.15

Abstract PDF

OBJECTIVE: This study was conducted to evaluate both personal and work-related factors associated with occupational injuries of ship-building supply workers in Busan, Korea.
METHODS
A self-administered, questionnaire survey, asking both personal and work-related factors associated with occupational injuries, was administered to 1,651 workers from 64 different ship-building supply companies in Busan, Korea. All occupational injuries had occurred within the previous 5 years. The workers were divided into three sub-groups: Group I, under 4 day-sick leave, Group II, 4 day-sick leave and over, and Group III, which consisted of both Groups I and II. The statistical significance of the factors associated with occupational injuries underwent cross tabulation analysis for each group. Afterwards, the relationships between the factors which had statistical significance and the occurrence of occupational injuries were analyzed through multiple logistic regression by using the SPSS 12.0 K program.
RESULTS
The prevalence of occupational injuries was 4.30% in Group II and 7.57% in Group III. The work activities which had the most frequent occupational injuries were 'Fit-up' and 'Welding', and 30.0% of injured workers were covered by workers' compensation in Group II. According to the multiple logistic regression analysis results, the factors which had statistical significance in occupational injury occurrence were education level above college (OR 2.78) and high level of fatigue (OR 2.18) in Group I, sleeping less than 5 hours per day (OR 3.47), high level of fatigue (OR 2.79) and working over 56 hours per week (OR 1.53) in Group II, and education level above college (OR 1.78), sleeping less than 5 hours per day (OR 2.98), poor sleep quality (OR 1.65) and high level of fatigue (OR 2.58) in Group III.
CONCLUSION
This study demonstrated that several factors of ship-building supply workers such as sleep hours, sleep quality, fatigue, working hours, and educational level exerted a statistical effect on the occurrence of occupational injuries. In association with occupational injuries occurrence, these factors need to be controlled by proper methods such as effective safety education, work condition modification, and life style management.

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