Annals of Occupational and Environmental Medicine

Original Article

Impact of neck posture and insulating stick use on neck disability in Korean line workers: a cross-sectional study: Bounggyun Ju, Jaehoo Lee, Hye-min Kim, Chul Gab Lee, Hansoo Song; Ann Occup Environ Med 2024;36:e11. Published online April 15, 2024; DOI: https://doi.org/10.35371/aoem.2024.36.e11

Abstract Abstract in Korean PDF Supplementary Material PubReader ePub: Background
Occupational neck disability is a prevalent issue, especially among line workers, who are often exposed to elevated levels of cervical ergonomic stress. The aim of this study was to investigate the impact of neck posture and insulating stick use on neck disability in a specific occupational group in Korea.
Methods
This cross-sectional study was conducted among 483 line workers in Gwangju and Jeonnam, Korea. Data were collected using the Neck Disability Index, Cervical Degenerative Index, and a structured questionnaire focusing on demographic and occupational factors. Logistic regression analysis was applied to determine the adjusted odds ratio (OR) and 95% confidence interval (CI) for neck posture and factors related to neck disability.
Results
Neck disability prevalence was 17.2% among the participants. Multivariate logistic regression analysis showed that factors related to neck disability included age over 60 years (adjusted OR: 3.08; 95% CI: 1.63–5.83), depression (adjusted OR: 8.33; 95% CI: 3.85–18.00), a history of cervical trauma (adjusted OR: 2.13; 95% CI: 1.04–4.40), and radiological degenerative changes in the cervical spine (adjusted OR: 2.33; 95% CI: 1.26–4.33). In particular, the adjusted OR of neck disability among live-line workers was 2.10 (95% CI: 1.12–3.92) when compared with support workers (model 1). Other analysis models showed that use of insulating sticks for more than 10 hours per week (adjusted OR: 2.46; 95% CI: 1.32–4.61) and higher neck extension (adjusted OR: 2.98; 95% CI: 1.14–3.46) were significant work-related risk factors (model 2,3).
Conclusions
Neck posture, age, depression, cervical trauma history, degenerative changes in the cervical spine, and use of insulating sticks are significant risk factors for neck disability among line workers in Korea. These findings highlight the need to improve the working environment and reduce the burden of cervical ergonomic stress among line workers.; 한국 배전보수원의 목 부담자세와 절연스틱사용이 목 장애에 미치는 영향
목적
직업성 목 장애는 특히 높은 수준의 목 부담에 자주 노출되는 배전보수원 사이에서 흔한 문제다. 본 연구는 배전보수원을 대상으로 목 부담자세와 절연스틱사 용이 목 장애에 미치는 영향을 알아보고자 한다.
방법
본 단면연구는 광주와 전남 지역의 배전보수원 483명을 대상으로 실시되었다. 목 장애 지수, 경추퇴행성 지수, 인구통계학적 및 직업적 요인에 초점을 맞춘 구조화된 설문지를 사용하여 데이터를 수집했다. 목 부담자세와 목 장애 관련 요인에 대한 보정 교차비와 95% 신뢰구간(CI)을 알아보기 위해 로지스틱 회귀분석을 시행하였다.
결과
목 장애 유병률은 활선작업자(22.6%)에서 가장 높았으며, 연령이 높아질수록 증가하는 경향을 보였다. 목 장애 관련 요인은 우울증(8.13, 95% CI: 4.02~16.43), 경추 외상 병력(3.53, 95% CI: 1.88~6.63), 경추 방사선학적 퇴행성 변화(2.35, 95% CI: 1.36-4.07)였다. 직업적 요인으로 활선작업자의 보정교차비는 2.10 (95% CI: 1.12-3.92)이었고, 절연스틱을 주당 10시간 이상 사용하는 경우 보정교차비는 2.46 (95% CI: 1.32-4.61)이었다. 또한, 높은 목 신전 부담의 보정교차비는 1.98 (95% CI: 1.14-3.46)이었다.
결론
연령, 우울증, 경추 외상, 경추의 퇴행성 변화와 같은 일반적 요인뿐만 아니라 활선작업, 절연스틱 사용, 목 부담 자세와 같은 직업적 요인은 국내 배전보수원의 목 장애를 유발하는 위험 요인이다. 이러한 결과는 배전보수원의 작업환경 개선의 필요성을 시사한다.

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Research Article

Hazards and health problems in occupations dominated by aged workers in South Korea: Jungsun Park, Soo Geun Kim, Jong-shik Park, Boyoung Han, Kab Bae Kim, Yangho Kim; Ann Occup Environ Med 2017;29:27. Published online June 26, 2017; DOI: https://doi.org/10.1186/s40557-017-0177-9

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Background

South Korea’s population is aging more rapidly than any other country. Aging of the productive population will lead to shortage of labor and the decreasing quality of the labor force in South Korea. South Korea needs health care strategies to support the establishment of work environments that are appropriate for elderly workers who have reduced physical capacity. This paper aims to identify occupations that are dominated by aged workers and assess the exposure to hazards and work-related health problems of aged workers in these occupations.

Methods

We identified the 20 occupations in South Korea that employ the most aged workers (at least 55 years-old), among all 149 occupations that are defined as minor categories (identified by three digits) by the Korean Standard Classification of Occupations (KSCO). Exposure to hazards and work-related health problems of individuals in these occupations were evaluated by analyzing the results of the fourth Working Conditions Survey of 2014.

Results

Among the 20 occupations that employ the most aged workers, ‘Elementary Occupations’, which the KSCO classifies as major category (9), had the largest proportion of aged workers. After this, there were five occupations of skilled manual workers and six occupations of skilled non-manual workers. Aged workers in elementary and skilled manual occupations reported frequent exposure to job-specific hazards, such as noise, vibrations, high and low temperatures, solvents, and chemicals. Relative to other workers, aged workers in the occupations reported more frequent exposure to ergonomic hazards, such as tiring or painful positions, carrying or moving heavy loads, and repetitive movements, and also reported more work-related musculoskeletal disorders and general fatigue. Injury due to accident was common in machinery-handling occupations.

Conclusion

Job-specific hazards should be reduced to prevent occupation-related disorders in elementary and skilled manual occupations that are dominated by aged workers.

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Research Article

Ambulatory heart rate of professional taxi drivers while driving without their typical psychosocial work stressors: a pilot study: BongKyoo Choi, SangJun Choi, JeeYeon Jeong, JiWon Lee, Shi Shu, Nu Yu, SangBaek Ko, Yifang Zhu; Ann Occup Environ Med 2016;28:54. Published online October 6, 2016; DOI: https://doi.org/10.1186/s40557-016-0139-7

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Background

Few studies have examined ambulatory cardiovascular physiological parameters of taxi drivers while driving in relation to their occupational hazards. This study aims to investigate and quantify the impact of worksite physical hazards as a whole on ambulatory heart rate of professional taxi drivers while driving without their typical worksite psychosocial stressors.

Methods

Ambulatory heart rate (HR_driving) of 13 non-smoking male taxi drivers (24 to 67 years old) while driving was continuously assessed on their 6-hour experimental on-road driving in Los Angeles. Percent maximum HR range (PMHR_driving) of the drivers while driving was estimated based on the individual HR_driving values and US adult population resting HR (HR_rest) reference data. For analyses, the HR_driving and PMHR_driving data were split and averaged into 5-min segments. Five physical hazards inside taxi cabs were also monitored while driving. Work stress and work hours on typical work days were self-reported.

Results

The means of the ambulatory 5-min HR_driving and PMHR_driving values of the 13 drivers were 80.5 bpm (11.2 bpm higher than their mean HR_rest) and 10.7 % (range, 5.7 to 19.9 %), respectively. The means were lower than the upper limits of ambulatory HR and PMHR for a sustainable 8-hour work (35 bpm above HR_rest and 30 % PMHR), although 15–27 % of the 5-min HR_driving and PMHR_driving values of one driver were higher than the limits. The levels of the five physical hazards among the drivers were modest: temperature (26.4 ± 3.0 °C), relative humidity (40.7 ± 10.4 %), PM_2.5 (21.5 ± 7.9 μg/m³), CO₂ (1,267.1 ± 580.0 ppm) and noise (69.7 ± 3.0 dBA). The drivers worked, on average, 72 h per week and more than half of them reported that their job were often stressful.

Conclusions

The impact of physical worksite hazards alone on ambulatory HR of professional taxi drivers in Los Angeles generally appeared to be minor. Future ambulatory heart rate studies including both physical and psychosocial hazards of professional taxi drivers are warranted.

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Review

Environmentally induced, occupational diseases with emphasis on chronic kidney disease of multifactorial origin affecting tropical countries: Shehani A. Wimalawansa, Sunil J. Wimalawansa; Ann Occup Environ Med 2016;28:33. Published online August 5, 2016; DOI: https://doi.org/10.1186/s40557-016-0119-y

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Background

Environmentally induced, occupational diseases are increasing worldwide, especially in rural agricultural communities. Poverty-associated malnutrition, environmental hazards and pollution, and lack of access to clean water, safe sanitation, and modern healthcare facilities are often associated with these chronic illnesses.

Method

The authors systematically reviewed occupational public health issues that have been related to the environment. General interpretations of results were included as per the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Pertinent publications from research databases were reviewed on (A) the risk–benefits, (B) the prevalence of risk factors for various diseases, (C) the benefits of not ignoring the risk factors (i.e., broader evidence), and (D) the risks, effects, and outcomes of different types of interventions. The authors used chronic kidney disease of multifactorial origin (CKDmfo) as an example to explore the theme. Emphasis was given to the regions with emerging economies and developing countries located in the vicinity of the equator.

Findings

Geographical, socio-economic and aetiological similarities exist for many chronic non-communicable diseases that are affecting tropical countries around the equator. The authors identified manufacturing, mining, and agriculture as the biggest polluters of the environment. In addition, deforestation and associated soil erosion, overuse of agrochemicals, and irresponsible factory discharge (e.g., chemicals and paint, from rubber and textile factories, etc.), all contribute to pollution. To decrease the escalating incidences of environmentally induced diseases, governments should work proactively to protect the environment, especially watersheds, and take steps to minimise harmful occupational exposures and strictly enforce environmental regulations.

Conclusion

Creating public awareness of environmental issues and their relationship to public health is essential. This includes regular monitoring and periodic publication of the quality of water, air and soil; preventing deforestation and man-made soil erosion, increasing forest and ground cover, preventing occupational injuries, judicious and safe use of agrochemicals, sustainable agriculture and development programs, and implementing legislation to protect and conserve water heriage and the environment. These actions are essential both for a healthier environment and for the health of the people who live in that environment. Such measures would also decrease public health threats from such, including global-warming-related erratic environmental changes and the occurrence and the spread of non-communicable diseases, such as CKDmfo.

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Original Article

The occupational hazards of interns & residents during training: Hye Ran Song, Jin Ha Kim, Joo Hyun Byeon, Kaung Young Lee, Duck Hi Lee, Ho Chan Kim; Korean Journal of Occupational and Environmental Medicine 2003;15(3):213-223. Published online September 30, 2003; DOI: https://doi.org/10.35371/kjoem.2003.15.3.213

Abstract PDF

OBJECTS: Residents are exposed to various hazards and harassed by sleep deficiency due to overwork. This study was performed to outline the health condition of residents and develop the ways of improving it.
METHODS
A questionnaire was distributed to 881 army doctors who enrolled at the Korea Third Military Academy and The Armed Force Health Service School in 2000 with the exception of medical doctors who joined the armed service without going through intern and resident periods , dental and oriental medical doctors. 784 (89.0%) of the 881 questionnaires were returned of which 704 cases (79.9%). This should actually be 89.0% were regarded for analyses as being reliable data.
RESULTS
More than 20% of residents were exposed to radiation, laser, disinfectants, anesthetic gas, and anticancer drugs during their training periods with preventive measures for each of these hazards taken in about 10% of the cases of the lesser hazards but in about 35% for the hazards from radiation and laser. 91.1% of residents had experience of needlestick injuries during their training periods with over 36.3% being exposed to patients with infection during that time. The cases contracting HBV and HCV diseases due to pricking are 2.3 and 0.6% respectively. The average number of night duties per month during a one-year resident's period was about 19. The average sleeping time on duty during a one-year residents was less than 4 hours .28.4% of respondents were not satisfied with their occupation, 96.5% felt tired from overwork and 69.5% wanted to change their occupation to another that would pay the same salary.
CONCLUSION
Residents are exposed to harmful physical , chemical and biological factors, but the preventive care seldom undertaken. In addition, their overwork brings about lack of sleep which causes them problems when giving medical treatment to patients during their training periods. Despite the resident's interest in an occupation as a doctor, many intend to select other occupations if they can receive the same salary. According to the above results, preventative systems and measures should be prepared with environmental improvements for residents, and proper rewards for their overwork should be accomplished.

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Jang‐Wook Sohn, Byoung‐Gwon Kim, Soo‐Hyun Kim, Changsu Han
Journal of Occupational Health.2006; 48(6): 474. CrossRef

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Original Article

A Study on Health Hazards of Cold Exposed Workers: Ho Chu Park, Seol Mi Jung, Deog Hwan Moon, Jong Tae Lee, Dae Hwan Kim, Jung Ho Kim, Jae Il Choi, Yong Shik Hwang, Yong Hee Lee, Chae Un Lee; Korean Journal of Occupational and Environmental Medicine 1999;11(1):80-94. Published online March 31, 1999; DOI: https://doi.org/10.35371/kjoem.1999.11.1.80

Abstract PDF

In order to evaluate the status of cold exposure and its health hazards of workers at cold storage workplaces and to provide basic data for effective health care, the author measured core temperature and also observed clinical symptoms and signs, past and present history, and general health examination data on 99 cold exposed workers for exposure group and 96 non-exposed workers for control group working at 2 food refrigerating companies in Pusan area from January 6, 1998 to February 24, 1998. The results were as follows : 1. There was statistically significant difference in water intake between the exposure and control group and increased urine volume, urine frequency in exposure group without statistically significant difference. 2. Past and present illness in exposure group were hypertension (18.2%), hepatopathy(8. 1%). gastro-intestinal disease(7. 1%). arthritis (4.0%), intervertebral disc herniation(4.0%). and so on, and hypertension, arthritis was statistically significant difference compared to control group. 3. Symptoms inexposure group were. fatigue(89.9%), headache (64.6%), drowsy(63.6%), neck stiffness(59.6%), excessive food intake (59.6%). general weakness(58.6%), hunger(58. 6%), numbness(54. 5%), and so on, and there was statistically significant difference between the exposure and control group except fatigue, drowsy. 4. As results of clinical test abnormality rate of the systolic, diastolic blood pressure and electrocardiogram were significantly higher in exposed group that control. 5. Core temperature in exposure group was statistically significantly lower than control group and the highest statistically significant inverse correlation with the working hours and working frequency of daily mean cold storage. As above results, the author suggested that the further studies should be conducted to evaluate the health status of workers about chronic health effects in cold workplaces and to establish effective health care methods for them.

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Physiological Reaction to Work in Cold Microclimate
Alicja Bortkiewicz, Elżbieta Gadzicka, Wiesław Szymczak, Agata Szyjkowska, Wiesława Koszada-Włodarczyk, Teresa Makowiec-Dąbrowska
International Journal of Occupational Medicine and Environmental Health.2006;[Epub] CrossRef
The Relationship between Cold Exposure and Hypertension
Joon‐Youn Kim, Kap‐Yeol Jung, Young‐Seoub Hong, Jung‐Il Kim, Tae‐Won Jang, Jung‐Man Kim
Journal of Occupational Health.2003; 45(5): 300. CrossRef

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