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.

Citations

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Sara Alves, Josiana Vaz, Adília Fernandes
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Research Article

Relationship between long work hours and self-reported sleep disorders of non-shift daytime wage workers in South Korea: data from the 5th Korean Working Conditions Survey: Hongsuk Choi, Sungho Lee, Man-Joong Jeon, Young-Sun Min; Ann Occup Environ Med 2020;32:e35. Published online November 3, 2020; DOI: https://doi.org/10.35371/aoem.2020.32.e35

Abstract PDF PubReader ePub

Background

Studies have investigated the relationship between long work hours and sleep disorders; however, they have focused on shift workers or specific workers who are at high risk of industrial accidents rather than wage workers in general. The purpose of this study is to investigate the effects of long work hours on sleep disorders among non-shift daytime wage workers.

Methods

We conducted a secondary analysis of data from the 5th Korean Working Conditions Survey. From the 50,205 total participants, we included 26,522 non-shift daytime wage workers after excluding self-employed people, business owners, unpaid family employees, and wage workers who work nights and shifts. Sleep disorders were categorized into “difficulty in falling asleep,” “frequent waking,” and “waking up with fatigue.” Logistic regression analysis was used to evaluate the influence of long work hours on sleep disorders, and the odds ratios (ORs) were calculated.

Results

The OR of working > 52 hours per week was 1.183 (95% confidence interval [CI]: 1.002–1.394) for the risk of developing insomnia compared with working ≤ 40 hours per week. The OR of waking up with fatigue was 1.531 (95% CI: 1.302–1.801). Long work hours showed no significant relationship with difficulty in falling asleep or with frequent waking.

Conclusions

Working for extended hours was associated with increased fatigue upon waking in non-shift daytime wage workers.

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Research Article

Factors Related to Sleep Disorders among Male Firefighters: Dong-Kyun Lim, Ki-Ook Baek, In-Sung Chung, Mi-Young Lee; Ann Occup Environ Med 2014;26:11-11. Published online May 22, 2014; DOI: https://doi.org/10.1186/2052-4374-26-11

Abstract PDF PubReader ePub

Objectives

The aim of this study was to investigate factors associated with sleep disorders in male firefighters working in a metropolitan city in South Korea.

Methods

Self-administered questionnaires including the Nordic Musculoskeletal Questionnaire, Korean Occupational Stress Scale-Short Form, Psychosocial Well-Being Index-Short Form, Pittsburg Sleep Quality Index, and Beck-Depression Inventory-2 as well as surveys collecting socio-demographic characteristics and work-related factors were given to 730 male firefighters. After exclusion for missing data, 657 male firefighters were included, and logistic regression analysis adjusted for the work-related factors, psychosocial factors, and general risk factors were used to assess the relationship between sleep disorders and associated factors.

Results

The prevalence of sleep disorders was 48.7%. Shift work (adjusted OR 1.58, 95% CI = 1.02-2.45), musculoskeletal symptoms (adjusted OR 2.89, 95% CI = 2.02-4.14), and depression (adjusted OR 7.04 95% CI = 4.03-12.30) were associated with sleep disorders.

Conclusions

Musculoskeletal symptoms, shift work, and depression are associated with sleep disorders. Integrated health management is needed to promote good sleep quality among firefighters.

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