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Original Article
- Association between shift work and inflammatory markers in workers at an electronics manufacturing company
- Sung-Joon Woo, Chang-Ho Chae, Jae-Won Lim
- Ann Occup Environ Med 2022;34:e35. Published online November 7, 2022
- DOI: https://doi.org/10.35371/aoem.2022.34.e35
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Abstract
Abstract in Korean
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ePub Background Shift work is known to be associated with cardiovascular disease (CVD). It has been found that inflammatory reactions are involved in the onset and progression of CVD. Therefore, the purpose of this study was to investigate the association between shift work and inflammatory markers.
Methods Among workers at an electronics manufacturing company, 2,329 workers who had a health checkup from January 2019 to December 2019 were targeted. The general and biochemical characteristics of daytime workers and shift workers were compared through the Independent-test and the χ2 test. Through multiple linear regression analysis, the association with shift work and inflammatory markers was investigated. Through multiple logistic regression analysis, the association with shift work and high inflammatory markers
Results The mean total leukocytes, neutrophils, monocytes, lymphocytes of shift workers were significantly higher than those of daytime worker. The mean high-sensitivity C-reactive protein (hs-CRP) of shift workers was also higher than that of daytime workers but not significantly. In multiple linear regression, shift work was associated with increase of total leukocyte count (
β = 0.367,p < 0.001) and hs-CRP (β = 0.140,p = 0.005) after adjusting for all variables. In multiple logistic regression analysis, shift work showed 2.27 times risk of high leukocyte count and 1.8 times risk of high hs-CRP level compared to daytime work after adjusting for all variables.Conclusions This study confirmed that shift work is associated with high inflammatory markers. Considering that high inflammatory markers is independent indicator of CVD, the association between shift work and high inflammatory markers may help to understand the CVD risk of shift workers.
- 일개 전자제품 제조업 근로자에서 교대근무와 염증 표지자의 연관성
목적
교대근무는 심혈관 질환과 관련이 있는 것으로 알려져 있다. 염증반응이 심혈관질환의 발병과 진행에 관여하는 것으로 나타났다. 따라서 본 연구의 목적은 교대근무와 염증표지와의 연관성을 조사하는 것이었다..
방법
전자제품 제조업체 근로자 중 2019년 1월부터 2019년 12월까지 건강검진을 받은 근로자 2,329명을 대상으로 했다. Independent-test와 chi-square test를 통해 주간근로자와 교대근무자의 일반 및 생화학적 특성을 비교하였다. 다중선형회귀분석을 통해 교대근무와 염증표지와의 연관성을 조사하였고, 다중 로지스틱 회귀분석을 통해 교대근무와 높은 수준의 염증성 마커와의 연관성을 조사하였다.
결과
교대근무자의 평균 총 백혈구, 호중구, 단핵구, 림프구는 주간근무자에 비해 유의하게 높았다. 교대근무자의 평균 hs-CRP도 주간근무자에 비해 높았지만 유의미하지는 않았다. 다중 선형 회귀 분석에서 교대 근무는 모든 변수를 조정한 후 총 백혈구 수 증가(β = 0.367, p-value < 0.001)와 hs-CRP(β = 0.140, p-value = 0.005)와 관련이 있었다. 다중 로지스틱 회귀분석에서 교대근무는 모든 변수를 조정한 후 주간근무에 비해 높은 백혈구 수의 위험이 2.27배, 높은 hs-CRP 수준의 위험이 1.8배였다.
결론
이 연구는 교대 근무가 높은 염증 지표와 관련이 있다는 것을 확인 하였다. 높은 염증 지표는 심혈관 질환의 독립적인 지표라는 점을 고려할 때 교대 근무와 높은 염증 지표 사이의 연관성은 교대 근무자의 CVD 위험을 이해하는 데 도움이 될 수 있다. -
Citations
Citations to this article as recorded by
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Research Article
- Night shift work and inflammatory markers in male workers aged 20–39 in a display manufacturing company
- Seong-Woo Kim, Eun-Chul Jang, Soon-Chan Kwon, Wook Han, Min-Sung Kang, Young-Hyeon Nam, Yong-Jin Lee
- Ann Occup Environ Med 2016;28:48. Published online September 20, 2016
- DOI: https://doi.org/10.1186/s40557-016-0135-y
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Abstract
PDFPubReaderePub
Background This study aimed to determine the association between shift work and inflammatory markers, which are independent risk factors of cardiovascular diseases, in male manual workers at a display manufacturing company.
Methods This study was conducted between June 1 and July 31, 2015 on 244 male manual workers aged 20–39 years old at a display manufacturing company and investigated age, marital status, education level, alcohol consumption habit, smoking habit, regular exercise habit, sleep duration, sleep debt, sleep insufficiency, past medical history, current and past shift work experience, duration of shift work, and weekly work hours through face-to-face interviews using structured questionnaires and performed blood tests. Study participants were divided into daytime, former shift, and current shift workers based on the work schedule. Chi-square tests and one-way analyses of variance were performed to compare inflammatory markers and cardiovascular disease risk factors, and analyses of covariance were conducted after adjusting for variables potentially affecting inflammatory markers.
Results High-sensitivity C-reactive protein (hs-CRP; mean ± standard deviation) levels in daytime, former shift, and current shift workers were 0.65 ± 0.43, 0.75 ± 0.43, and 0.86 ± 0.72 mg/L, respectively (
p = 0.029). The leukocyte count (mean ± standard deviation) was 5,556 ± 1,123, 6,210 ± 1,366, and 6,530 ± 1,216 cells/μL, respectively (p < 0.001). Both hs-CRP level and leukocyte count were significantly higher in current shift workers than in daytime workers, and leukocyte count was higher in former shift workers than in daytime workers. After adjusting for variables potentially affecting inflammatory markers, hs-CRP levels (adjusted mean ± standard deviation) in daytime and current shift workers were 0.59 ± 0.06 and 0.92 ± 0.07 mg/L, respectively (p = 0.002). The leukocyte count (adjusted mean ± standard deviation) was 5,557 ± 124 and 6,498 ± 144 cells/μL, respectively (p < 0.001).Conclusions A significant association between shift work and increases in inflammatory markers was confirmed. Because chronic low-grade inflammation plays an important role in the development of cardiovascular diseases, regular follow-up of inflammatory markers as a marker of cardiovascular diseases in shift workers may serve as an early indicator in predicting the effects of shift work on health.
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