Annals of Occupational and Environmental Medicine

Original Article

The relationship between chronotypes and musculoskeletal problems in male automobile manufacturing workers: Suwhan Kim, Won-Ju Park, Seunghyeon Cho, Dae-Young Lim, Yeongjae Yoo, Hyeonjun Kim, Wonyang Kang, Kyung Wook Kang, Jai-Dong Moon; Ann Occup Environ Med 2021;33:e26. Published online August 13, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e26

Abstract Abstract in Korean PDF PubReader ePub

Background

Previous studies have shown that morning types are less sensitive to pain. This study aimed to examine the relationship between chronotypes and musculoskeletal problems in workers with musculoskeletal burdens at work.

Methods

This cross-sectional study included 119 male production workers from a large automobile manufacturing plant. All the participants worked 2 shifts and worked on the automobile assembly line. Data were obtained using structured questionnaires, including the reduced Morningness-Eveningness Questionnaire (rMEQ), and musculoskeletal symptom questionnaire. Participants with an rMEQ score of 18 points or more were defined as morning-type workers (MTWs). Participants whose scores were less than 18 points were defined as neither-type workers (NTWs).

Results

The arithmetic mean age was 51.8 ± 5.3 years. MTWs and NTWs accounted for 35.3% and 64.7% of the total participants, respectively. Evening- and intermediate-type workers accounted form 6.7% and 58.0% of the participants, respectively. There was no significant difference in the health indicators when the MTW and NTW groups were compared. However, the musculoskeletal symptom questionnaire demonstrated a significant difference between the MTW and NTW groups. In the preceding year, the MTW group had significantly lower musculoskeletal pain and treatment ratios compared to the NTW group (35.7% vs. 62.3%, p = 0.005 and 14.3% vs. 32.5%, p = 0.031, respectively). After adjusting for variables, the odds ratio (OR) for musculoskeletal pain was significantly higher in the NTW group than in the MTW group (OR, 3.112; 95% confidence interval, 1.285–7.535; p = 0.012).

Conclusions

In this study, the musculoskeletal pain ratio was significantly lower for MTWs when compared to NTWs. Chronotypes could play an important role in work-related musculoskeletal disorders. Further, larger-scale, follow-up studies on chronotypes are required to assist in the prevention of musculoskeletal disorders in future.

자동차 생산 남성 근로자에서 일주기성과 근골격계 통증과의 관련성
목적
사람의 심리적, 신체적 상태는 하루 주기에 따라 변화하며 일주기성에 따라 각 개인이 선호하는 최적의 활동시간대에 차이가 있다. 기존 연구들은 이러한 개인의 일주기성에 따라 통증에 대한 민감도의 차이를 보인다는 결과를 제시하고 있다. 본 연구에서는 근골격계 부담작업을 수행하는 생산직 남성 근로자를 대상으로 개인의 일주기성을 파악하고 근골격계 통증과의 관련성을 살펴보고자 하였다.
방법
자동차 제조 공장에서 근무하는 남성 근로자 119명을 대상으로 단면 연구를 시행하였다. 모든 대상자는 2교대 형태로 조립공정에서 근무하였다. 단축형 아침형-저녁형 척도, 불면증 심각성 척도, 스트레스 척도 및 근골격계 증상 여부를 포함한 설문을 실시하였으며 혈액검사를 통해 건강지표를 확보하였다. 단축형 아침형-저녁형 척도가 18점 이상인 경우를 아침형 근로자로, 18점 미만인 경우를 비아침형 근로자로 정의하였다.
결과
아침형 근로자와 비아침형 근로자는 각각 전체 대상자의 35.3%와 64.7%를 차지했다. 아침형 근로자 군과 비아침형 근로자 군의 비교에서 체질량지수, 흡연, 음주, 운동, 고혈압, 당뇨병, 지질, 신장 기능, 코티솔, C 반응성 단백질, 평균 수면 시간, 수면 및 스트레스 점수에는 유의한 차이를 보이지 않았다. 그러나 근골격계 증상 설문 중 최근 1년간 근골격계 통증 및 근골격계 치료 여부 비율에서 아침형 근로자 군과 비아침형 근로자 군 간의 유의한 차이가 관찰되었다(각각 35.7%대 62.3 %, p = 0.005 및 14.3%대 32.5%, p = 0.031). 변수를 보정한 후 근골격계 통증 발생의 오즈비는 아침형 근로자 군보다 비아침형 근로자 군에서 유의하게 높았다(오즈비 3.112, 95% 신뢰구간 1.285–7.535, p = 0.012).
결론
근골격계 질환은 업무상질병의 큰 비중을 차지하고 있으며 이를 예방하기위해 그 위험 요인에 대한 다각적 접근이 필요하다. 본 연구에서는 비아침형 근로자 군에서 상대적으로 높은 근골격계 통증 비율을 확인하였으며, 이는 일주기성이 업무 관련 근골격계 질환에서 의미 있는 인자일 가능성을 시사한다. 이를 토대로 근골격계 질환의 예방을 위해 개인의 일주기성에 대한 개입이나 일주기성에 맞춘 업무환경개선과 같은 새로운 접근 방법이 고려될 수 있다. 향후 근골격계 질환의 예방을 위해 근로자의 일주기성에 관한 추가적인 연구가 필요할 것이다.

Citations

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Influence of chronotype on pain incidence during early adolescence
Rui Li, Cornelius Groenewald, See Wan Tham, Jennifer A. Rabbitts, Teresa M. Ward, Tonya M. Palermo
Pain.2024;[Epub] CrossRef
Medium- and Long-Term Effects of Insomnia Severity and Circadian Preference on Pain and Emotional Distress Among Individuals With Chronic Pain
Chung Jung Mun, Nina Winsick, Stephen T. Wegener, Shawn D. Youngstedt, Claudia M. Campbell, Rachel V. Aaron
The Journal of Pain.2023; 24(11): 1946. CrossRef
Circadian Rhythm and Pain: a Review of Current Research and Future Implications
Chung Jung Mun, Helen J. Burgess, Dorothy D. Sears, Sairam Parthasarathy, Dara James, Ulysses Altamirano, Surabhi Sajith, Ananya Lakhotia, Roger B. Fillingim, Shawn D. Youngstedt
Current Sleep Medicine Reports.2022; 8(4): 114. CrossRef
Physical hazards, musculoskeletal pain, and job control: Multilevel results from the European Social Survey
Duygu Gulseren
Safety Science.2022; 156: 105901. CrossRef

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Original Article

Seroprevalence of measles, mumps, rubella, and varicella-zoster antibodies in new female nurses in the Republic of Korea: Yeongjae Yoo, Won-Ju Park, Seunghyeon Cho, Dae-Young Lim, Suwhan Kim, Wonyang Kang, Hyeonjun Kim, Jai-Dong Moon; Ann Occup Environ Med 2021;33:e19. Published online June 15, 2021; DOI: https://doi.org/10.35371/aoem.2021.33.e19

Abstract Abstract in Korean PDF PubReader ePub

Background

For health care workers, immune management plays an important role in the protection against infectious diseases. This study investigated the seroprevalence of measles, mumps, rubella, and varicella-zoster in newly employed female nurses.

Methods

We conducted a survey on the seroprevalence of measles, mumps, rubella, and varicella-zoster in newly employed female nurses at a university hospital from 2011 to 2019, before the nurses were given their department placements and duty start. Enzyme-linked immunosorbent and chemiluminescence immunoassays were used to detect immunoglobulin G antibodies. We analyzed whether there was a significant difference in seroprevalence depending on the age, birth year, birth season, and region of residence (metropolitan residency: yes or no).

Results

The arithmetic mean ages of the participants were 28.6 ± 4.8, 23.5 ± 3.2, 23.6 ± 3.0, and 26.1 ± 4.5 years for measles, mumps, rubella, and varicella-zoster, respectively. The seropositivity rates were 93.9% (551/587), 60.2% (50/83), 83.3% (3,093/3,711), and 89.5% (978/1,093) for measles, mumps, rubella, and varicella-zoster, respectively. Significant differences in the seroprevalence when assessed according to the age and birth year were noted with measles, while significant differences in the seroprevalence were only noted with rubella and varicella-zoster when assessed according to birth year and age, respectively.

Conclusions

In this study, we identified the levels of antibody prevalence in new female nurses. Considering the seropositivity levels, cost-effectiveness, and convenience for the participants, we recommend that the measles-mumps-rubella vaccination be provided without serologic testing for all new female nurses and the varicella-zoster vaccination only be performed for persons who are negative after serologic testing. And it would be useful if the vaccinations were combined with compulsory worker health examinations, such as the pre-placement health examinations.

신규 여성 간호사의 부서 배치 전 홍역, 유행성 이하선염, 풍진, 수두 항체의 혈청 유병율
목적
간호사는 다양한 환자와 직간접적인 접촉이 수시로 이루어지는 직종으로 감염병에 대한 면역 및 백신 예방접종이 매우 중요하다. 하지만 현재 신규 의료종사자 예방접종에 대한 명확한 규정은 없는 상태로 각 의료기관의 감염관리 정책에 따라 상이하게 수행되고 있다. 본 연구는 의료 종사자 중 신규 간호사를 대상으로 근무를 시작하기 전 상태에서 홍역, 유행성이하선염, 풍진 및 수두의 항체 혈청 유병률을 조사하였다. 향후 의료종사자에 대한 예방접종 정책 수립의 자료로 활용하고자 한다.
방법
2011년부터 2019년까지 일개 대학 병원에 신규 채용된 21~39세 여성 간호사를 대상으로 부서 배치 전 홍역, 유행성이하선염, 풍진, 수두에 대한 면역글로불린 항체를 발광면역측정법과 효소결합면역흡착측정법으로 측정하였다. 각 항체 유병률을 구하고 유병률에 유의한 영향을 미치는 인자가 있는지 카이제곱 검정 또는 선형 대 선형 결합법을 사용하여 분석하였다.
결과
연구대상자의 평균연령 및 표준편차는 홍역 28.6 ± 4.8세, 유행성 이하선염 23.5 ± 3.2세, 풍진 23.6 ± 3.0세, 수두 26.1 ± 4.5세였다. 신규 여성 간호사의 항체 유병률은 홍역 93.9% (551/587), 유행성이하선염 60.2% (50/83), 풍진 83.3% (3,093/3,711) 및 수두 89.5% (978/1,093)로 확인되었다. 홍역은 출생연도와 나이에 따라 항체 유병율에 유의한 차이가 있었다. 풍진은 출생연도에 따라 혈청 항체 유병률에 유의한 차이가 있었으며, 수두의 항체 유병률은 나이에 따라 차이가 있었다. 출생 계절 및 대도시 거주에 따른 각 항체의 유병률에는 유의한 차이는 없었다.
결론
의료기관 내에서 감염병에 대한 관리는 매우 중요하며 병원 내 감염 발생 시 큰 보건학적 문제가 발생하게 된다. 따라서 향후 의료기관 종사자에 대한 국가적인 예방접종 정책이 수립되어야 할 것이다. 항체 유병률, 항체검사 분석 비용, 채혈의 부작용 등을 고려할 때 신규 여성 간호사의 경우 채용되어 업무 시작 전 항체검사 없이 홍역/유행성이하선염/풍진(MMR) 예방접종 실시를, 수두는 항체검사 후 항체 음성인 사람에게 예방접종을 실시하는 것을 고려해 볼 수 있겠으며, 향후 이에 대한 정책연구가 필요할 것으로 판단된다. 또한 이러한 예방접종은 산업안전보건법 상의 배치 전 건강진단과 같은 근로자 건강진단과 병행한다면, 더 효과적으로 진행될 수 있을 것이다.

Citations

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Seroprevalence for Measles, Varicella, Mumps and Rubella in the Trainee Obstetric Population: A Survey in Southern Italy
Brunella Perfetto, Giovanna Paduano, Elena Grimaldi, Vincenza Sansone, Giovanna Donnarumma, Gabriella Di Giuseppe
Vaccines.2024; 12(3): 335. CrossRef
The third dose of measles-containing vaccine induces robust immune responses against measles in young seronegative healthcare workers who had previous two-dose measles vaccination
Yong Chan Kim, Heejin Nam, Jun Yong Choi, Eui-Cheol Shin, Young Hwa Choi
Journal of Infection and Public Health.2023; 16(10): 1643. CrossRef
Antibody Positivity Rates of Vaccine-preventable Diseases among New Healthcare Workers in a Teaching Hospital and Affecting Factors, 2019-2023
Eunjung Kim, Se Ju Lee, Jae Hyoung Im, Jin-Soo Lee, Jihyeon Baek
Korean Journal of Healthcare-Associated Infection Control and Prevention.2023; 28(2): 216. CrossRef
Strategies for Minimizing Mealses Transmission in Korean Healthcare Facilities
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Korean Journal of Healthcare-Associated Infection Control and Prevention.2022; 27(2): 125. CrossRef
Susceptibility towards Chickenpox, Measles and Rubella among Healthcare Workers at a Teaching Hospital in Rome
Giuseppe La Torre, Mattia Marte, Valentin Imeshtari, Corrado Colaprico, Eleonora Ricci, David Shaholli, Vanessa India Barletta, Pasquale Serruto, Aurelia Gaeta, Guido Antonelli
Vaccines.2022; 10(10): 1573. CrossRef
Seroprevalence of Varicella-Zoster Virus and Measles among Healthcare Workers in a Tertiary Medical Center in Korea
Ji Hyun Yun, Eunsol Lee, Jeong Hwa Choi, Hyun Kyun Ki, Jiho Park
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Research Article

Night shiftwork and prostate-specific antigen level in a tire manufacturing factory: Seunghyeon Cho, Won-Ju Park, WonYang Kang, Dae-Young Lim, Suwhan Kim, Jai-Dong Moon; Ann Occup Environ Med 2019;31:e19. Published online August 22, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e19

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Background

Recent studies suggest that night shiftwork may increase the risk of prostate cancer and elevated serum prostate-specific antigen (PSA) level. The purpose of this study was to verify whether rotating night shiftwork affects serum PSA level.

Methods

This study included 3,195 male production workers who work in a large tire manufacturing factory. Serum PSA levels were measured and the data on related factors were obtained.

Results

The mean serum PSA level was 0.98 ± 0.79 ng/mL. PSA levels were significantly lower in the younger age group, the obese group, and regular exercise group. PSA levels were lower in night shift workers (n = 2,832) compared to day workers (n = 363), but the difference was not statistically significant.

Conclusions

Unlike previous studies, we did not find any evidence that night shiftwork results in an increase in serum PSA levels. Further research and consistent results are needed to elucidate the association between night shiftwork and the effect on the prostate.

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Consequences of Shift Work and Night Work: A Literature Review
Isabel Silva, Daniela Costa
Healthcare.2023; 11(10): 1410. CrossRef
Night Work and Its Health Effects: Focusing on the Relevant Laws and Regulations of the Republic of Korea
Won-Ju Park
Journal of Sleep Medicine.2021; 18(1): 1. CrossRef
A Longitudinal Study of the Relationship between Shift Work and Prostate-Specific Antigen in Healthy Male Workers
Yesung Lee, Woncheol Lee, Hyoung-Ryoul Kim
International Journal of Environmental Research and Public Health.2021; 18(14): 7458. CrossRef

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Research Article

The association between serum dehydroepiandrosterone sulfate (DHEAS) levels and job-related stress among female nurses: Seunghyeon Cho, Won-Ju Park, Wonyang Kang, Hyeong-Min Lim, Ji-Sung Ahn, Dae-Young Lim, Jai-Dong Moon; Ann Occup Environ Med 2019;31:e18. Published online August 14, 2019; DOI: https://doi.org/10.35371/aoem.2019.31.e18

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Background

Dehydroepiandrosterone sulfate (DHEAS) is an endogenous steroid hormone produced by the adrenal gland. DHEAS has been suggested to play a protective role against psychosocial stress. The aim of this study was to investigate the association between job-related stress and blood concentrations of DHEAS according to occupational stress factors among female nurses.

Methods

A cross-sectional study was conducted among 118 premenopausal nurses from 4 departments (operating room, emergency room [ER], intensive care unit, and ward) of a university hospital. Participants were all rotating night shift workers who have worked for over a year and mean age of 33.5 ± 4.8 years. Data from structured questionnaires including the Korean Occupational Stress Score, Beck Depression Inventory (BDI), Beck Anxiety Inventory (BAI), and Pittsburgh Sleep Quality Index (PSQI) were used.

Results

In the high job-related stressor group, scores of BDI, BAI, and PSQI were significantly higher than low-stressor group. ER nurses had relatively more work-burden related stressors, but they had significantly lower levels of anxiety and depression than other groups. And, ER nurses showed higher levels of DHEAS than the other department nurses. The differences were significant (p = 0.003). Additionally, there was a statistically significant difference even after adjusting for factors that could affect level of DHEAS, such as age, body mass index, drinking, and physical activity (p = 0.039).

Conclusions

This result suggests the possibility that DHEAS may play a role as a marker of proper stress management. The capacity to secrete DHEAS is not simply due to workload or job stressor but could be determined depending on how individuals and groups deal with and resolve stress. Proper resolution of stress may affect positive hormone secretion.

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Case Report

Acute radiation syndrome in a non-destructive testing worker: a case report: Ji-Sung Ahn, Jai-Dong Moon, Wonyang Kang, Hyeong-Min Lim, Seunghyeon Cho, Dae-Young Lim, Won-Ju Park; Ann Occup Environ Med 2018;30:59. Published online September 25, 2018; DOI: https://doi.org/10.1186/s40557-018-0270-8

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Background

In Korea, there were repeated radiation exposure accidents among non-destructive testing workers. Most of the cases involved local injury, such as radiation burns or hematopoietic cancer. Herein, we report a case of acute radiation syndrome caused by short periods of high exposure to ionizing radiation.

Case presentation

In January 2017, Korea Information System on Occupational Exposure (KISOE) found that a 31-year-old man who had worked in a non-destructive testing company had been overexposed to radiation. The patient complained of symptoms of anorexia, general weakness, prostration, and mild dizziness for several days. He was anemic. The venous injection areas had bruises and bleeding tendency. Blood and bone marrow testing showed pancytopenia and the patient was diagnosed with acute radiation syndrome (white blood cells: 1400/cubic mm, hemoglobin: 7.1 g/dL, platelets: 14000/cubic mm). He was immediately prohibited from working and blood transfusion was commenced. The patient’s radiation exposure dose was over 1.4 Gy (95% confidence limits: 1.1–1.6) in lymphocyte depletion kinetics. It was revealed that the patient had been performing non-destructive tests without radiation shielding when working in high places of the large pipe surface.

Conclusions

Exposure prevention is clearly possible in radiation-exposed workers. Strict legal amendments to safety procedures are essential to prevent repeated radiation exposure accidents.

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Research Article

Insomnia and hearing impairment among occupational noise exposed male workers: Hyeong-Min Lim, WonYang Kang, Won-Ju Park, Keun-Ho Jang, Ji-Sung Ann, Jai-Dong Moon; Ann Occup Environ Med 2017;29:36. Published online August 15, 2017; DOI: https://doi.org/10.1186/s40557-017-0195-7

Abstract PDF PubReader ePub

Background

The aim of this study was to investigate the association between insomnia and hearing impairment among workers exposed to occupational noise.

Methods

This study included 809 male workers exposed to occupational noise. The participants underwent audiometric testing, and their insomnia was examined based on the Insomnia Severity Index test. Hearing impairment was defined as hearing threshold >25 dB hearing level in the range of 1–4 kHz.

Results

According to analysis of covariance, it was observed that pure tone audiometry thresholds at 1–2 kHz in the right ear and at 1 kHz in the left ear were significantly higher among workers with insomnia compared to those with no insomnia. Multiple logistic regression analysis of insomnia for hearing impairments was performed, which showed the odds ratio was 1.806 (95% confidence intervals: 1.022–3.188, p = 0.042) after adjustment for age, working period, noise level, snoring, use of protection devices, diabetes mellitus, hypertension, smoking, alcohol consumption, regular exercise, waist circumference, total cholesterol, triglyceride and high density lipoprotein cholesterol.

Conclusion

Insomnia could be associated with hearing impairment in workers who are exposed to occupational noise. Additionally, insomnia may be associated with decreased hearing at low frequencies. Especially, more efforts are required to improve the quality of sleep for workers who are exposed to loud occupational noise. Further well- designed prospective studies are needed to clarify the relationship between insomnia and hearing impairment.

Citations

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Hyeon Jo, Eun-Mi Baek
BMC Public Health.2024;[Epub] CrossRef
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Kening Jiang, Adam P. Spira, Rebecca F. Gottesman, Kelsie M. Full, Frank R. Lin, Pamela L. Lutsey, Emmanuel E. Garcia Morales, Naresh M. Punjabi, Nicholas S. Reed, A. Richey Sharrett, Jennifer A. Deal
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International Journal of Occupational Safety and Ergonomics.2023; 29(1): 154. CrossRef
Obstructive sleep apnea risk and hearing impairment among occupational noise-exposed male workers
Seunghyeon Cho, Won-Ju Park, Ji-Sung Ahn, Dae-Young Lim, Su-Hwan Kim, Jai-Dong Moon
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Xiaorui Cui, Zixuan Lu, Xinyue Guo, Neng Dai, Chen Huang, Yahang Liu, Ruilang Lin, Yongfu Yu, Guoyou Qin, Jiaohua Chen
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Research Article

Comparison of anxiety and depression status between office and manufacturing job employees in a large manufacturing company: a cross sectional study: WonYang Kang, Won-Ju Park, Keun-Ho Jang, Hyeong-Min Lim, Ji-Sung Ann, Seung-hyeon Cho, Jai-Dong Moon; Ann Occup Environ Med 2016;28:47. Published online September 15, 2016; DOI: https://doi.org/10.1186/s40557-016-0134-z

Abstract PDF PubReader ePub

Background

The aim of this study was to investigate whether type of work is associated with anxiety and depression using the Hospital Anxiety and Depression Scale (HADS). Additionally, we investigated the impact of number of working hours on anxiety and depression.

Methods

A total of 1774 workers participated and completed the HADS to determine their levels of anxiety and depression. All subjects were employed at one of two manufacturing plants for the same company. Of all participants, 222 were employed in office jobs and 1552 in manufacturing jobs.

Results

Results of multivariate logistic regression analysis including age, sex, body mass index, smoking status, alcohol consumption, regular exercise, factory region, and working hours, indicated that employment in an office job was associated with a 2.17-fold increase in the odds of anxiety compared to a manufacturing job (odds ratio [OR] = 2.17; 95 % confidence interval [CI], 1.24–3.80). Office jobs were also associated with a 1.94-fold increase in the odds of depression (OR = 1.94; 95 % CI, 1.34–2.82). In addition, number of hours worked was significantly associated with depression, and working hours significantly modified the effect of office job employment on the risk of depression.

Conclusions

Office job workers had higher levels of anxiety and depression than those working in manufacturing jobs. Our findings suggest that occupational physicians should consider the organizational risks faced by office job employees, and consider the differences in psychological health between office and manufacturing job workers when implementing interventions.

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