Annals of Occupational and Environmental Medicine

Data profile: Korean Work, Sleep, and Health Study (KWSHS): Seong-Sik Cho, Jeehee Min, Heejoo Ko, Mo-Yeol Kang; Ann Occup Environ Med 2025;37:e3. Published online February 19, 2025; DOI: https://doi.org/10.35371/aoem.2025.37.e3

Abstract Abstract in Korean PDF PubReader ePub: The Korean Work, Sleep, and Health Study (KWSHS) was launched in 2022 as a longitudinal panel study to examine the interactions between work conditions, sleep health, and labour market performance among the Korean workforce. Baseline data were collected from 5,517 participants aged 19 to 70, encompassing diverse occupations. Follow-up surveys occur biannually, accommodating seasonal variations in sleep and health dynamics. To ensure stability, refreshment samples were integrated in later waves, maintaining a cohort size of 5,783 participants in wave 5. Key data include socio-demographics, employment characteristics, sleep patterns, health outcomes, and workplace performance. Early findings highlight critical associations, such as the adverse effects of occupational physical activity on productivity, the impact of emotional labour on health-related productivity loss, and the significance of sleep disruptions on mental health. The cohort’s design enables detailed analyses of longitudinal and cross-sectional trends, offering insights into how changing work environments influence health and productivity. The KWSHS could serve as a vital resource for evidence-based interventions aimed at improving occupational health and productivity in Korea's evolving labour landscape. Data access is available through the study’s principal investigator upon request.; 한국 직업, 수면 및 건강 연구(KWSHS)
한국 직업, 수면 및 건강 연구(KWSHS)는 한국 노동자의 근로 조건, 수면 건강, 노동 시장 성과 간 상호작용을 조사하기 위해 2022년에 시작된 종단적 패널 연구이다. 기초 자료는 다양한 직업군을 포함하여 19세에서 70세까지의 5,517명을 대상으로 수집하였다. 후속 설문조사는 수면 및 건강 역학의 계절적 변동성을 고려하여 2년마다 실시하며, 코호트의 안정성을 유지하기 위해 후속 조사에서는 보충 표본을 추가하여 5차 웨이브에서는 총 5,783명의 코호트 규모를 유지하였다. 주요 자료에는 사회인구학적 정보, 고용 특성, 수면 패턴, 건강 결과 및 직장 성과 등이 포함된다. 초기 연구 결과는 직업적 신체활동이 생산성에 미치는 부정적 영향, 감정 노동이 건강 관련 생산성 손실에 미치는 영향, 그리고 수면 장애가 정신 건강에 미치는 중요성을 포함한 주요 연관성을 강조하고 있다. 본 코호트의 설계는 종단적 및 횡단적 추세에 대한 세부적인 분석을 가능하게 하여 변화하는 근로 환경이 건강 및 생산성에 미치는 영향을 심층적으로 이해할 수 있게 한다. KWSHS는 한국의 변화하는 노동 환경 속에서 직업 건강 및 생산성을 향상시키기 위한 근거 기반 개입을 위한 중요한 자원이 될 수 있다. 데이터 접근은 연구 책임자에게 요청을 통해 가능하다.

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Health care strategy for ensuring work ability in an aging Korea: Jungsun Park, Jong-tae Park, Soo Geun Kim, Cheol-In Yoo, Junseok Son, Jun Yim, Dae-seong Kim, Kyung Young Rhee, Yangho Kim; Ann Occup Environ Med 2016;28:42. Published online September 7, 2016; DOI: https://doi.org/10.1186/s40557-016-0127-y

The rapid aging trend in South Korea will cause a growing shortage of labor and decreasing quality of the labor force. The purpose of this commentary is to recommend a health care strategy to maintain and promote the work ability of employees in an aging Korea. Strategies to promote the work ability require the collaboration of governmental agencies at the central and local levels. First, the common goal should be the reinforcement of follow-up measure in general medical examinations and the promotion of healthy lifestyles for workers. Second, collaborating activities should be performed among the Worker’s Health Center, the Health Promotion Center, and community health centers. In conclusion, health care strategies for ensuring the work ability in an aging Korea require the collaboration of governmental agencies at the central and local levels.

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American Journal of Industrial Medicine.2017; 60(12): 1056. CrossRef
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Annals of Occupational and Environmental Medicine.2017;[Epub] CrossRef

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The Relationship between Work Ability and Job Stress Factors in Manufacturing Industries: Sangbum Ye, Dongmug Kang, Youngki Kim, Minjeong Son, Jongeun Kim, Somin Park; Korean Journal of Occupational and Environmental Medicine 2008;20(3):260-271. Published online September 30, 2008; DOI: https://doi.org/10.35371/kjoem.2008.20.3.260

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OBJECTIVE: This study was performed to investigate the association between work ability and job stress factors in three manufacturing industries.
METHODS
The data were gathered from 705 workers of 3 manufacturing industries, from August 2007 to January 2008. A structured, self-reported questionnaire was used to access the demographic, socioeconomic and work related characteristics. Work ability and job stress factors were determined using two questionnaires: the work ability index (WAI) of the Finnish Institute of Occupational Health and the Korean Occupational Stress Scale (KOSS), respectively.
RESULTS
According to the logistic regression analysis results, WAI was related to job stress factors after adjustment for age, shift work, employment type and exercise. Of the eight subscales, job demand, interpersonal conflict, lack of reward, occupational climate and total score were significantly associated with WAI. In the analysis of each factory, interpersonal conflict, job insecurity and lack of reward were significantly associated with WAI in factory II, and organizational system, lack of reward and total score in factory III, but there was no significant association in factory I.
CONCLUSIONS
Job stress factors were significantly associated with WAI in two of the three manufacturing industries. Further and more detailed study needs to be conducted to reduce the job stress and improve the work ability.

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Factors that determine the Work Ability Index of street cleaners
Jung Won Kim, Seonhee Yang, Insung Chung, Mi-Young Lee
Yeungnam University Journal of Medicine.2019; 36(3): 219. CrossRef

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The Relationship between Worker's Health Status and Work Ability Index in Small Scale Factories: Young Ha Lee, Sung Chul Hong, Jong Young Lee; Korean Journal of Occupational and Environmental Medicine 1998;10(2):149-160. Published online May 31, 1998; DOI: https://doi.org/10.35371/kjoem.1998.10.2.149

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This research was carried out to determine the relationship between worker's health status and work ability index in small scale factories. The data were gathered from 330 workers of Gumi industrial complex, from February to March, 1996. In this study, as questionnaire for the assessment of work ability, We used the work ability index which was developed by Institute of Occupational Health in Finland. The results of the study were summarized as follows; 1) Work ability index was poor in shift work group, more than 9 hours work group, irregular diet group, and stress sensitive group (p<0.01). There were no evident trends of work ability index in sex, marital status, educational level, obesity index, exercise, alcohol drinking and smoking. 2) As comparing work ability index with worker's health status, work ability index was poor in visual correction needed group, urine sugar positive group, and abnormal ALT & AST group (p<0.01) There were no evident trends of work ability index in hearing capacity, blood pressure, hematocrit and urine protein. 3) In the ANOVA was performed to examine the relationship between work ability index and significant factors above 1) and 2). shift work, work hours, diet, stress sensitive and health status were still statistically significant (p<0.05) on work ability index.

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