Annals of Occupational and Environmental Medicine

Research Article

The associations between work-related factors and temporomandibular disorders among female full-time employees: findings from the Fourth Korea National Health and Nutrition Examination Survey IV (2007–2009): Wook Han, Soon-Chan Kwon, Yong-Jin Lee, Chan Park, Eun-Chul Jang; Ann Occup Environ Med 2018;30:42. Published online June 20, 2018; DOI: https://doi.org/10.1186/s40557-018-0253-9

Background

The aim of this study was to investigate the association between work-related factors and temporomandibular disorders (TMD) among female full-time employees using representative data from a national population-based survey.

Methods

Data from the Fourth Korea National Health and Nutrition Examination Survey IV (2007–2009) were used to analyze 1,612 women. Complex samples logistic regression was applied for adjusting for general characteristics and work-related factors to examine the association between work-related factors and TMD.

Results

The prevalence of TMD was 12.8% in this study population. With respect to age, educational status, marital status, problem drinking, exercise, and stress, there were statistically significant differences in the prevalence of TMD. In logistic regression analyses on complex samples, based on 40 h or less per week, odds ratios (ORs) for respondents who worked 40–48 working hours, 49–60 working hours, and more than 60 h were 1.16 (95% confidence interval (CI) 0.69–1.94), 1.41 (95% CI 0.79–2.54), and 2.43 (95% CI 1.29–4.59), after adjusting for general characteristics, working schedule, employment status, and occupation.

Conclusions

This study found that long working hours were significantly associated with TMD in Korean female full-time employees.

Citations

Citations to this article as recorded by

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Shiqian Wu, Zhuo Chen, Yawen Zhao, Qiang He, Zhongxiu Yin, Hailiang Yao, Huili Liu, Lihui Yan
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Adrian Ujin Yap, Ye Choung Lai, Henry Chee Wai Ho
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Cross-sectional study of self-reported pain related to temporomandibular disorders and emotional state of medical school faculty and students: Post-COVID-19 pandemic
Alessandra Pucci Mantelli Galhardo, Pâmela Ramos Andrade, Luciana Paes de Andrade, Mariluce Anache Anbar Cury, Marcio Katsuyoshi Mukai, Edmund Chada Baracat, José Maria Soares Jr., James J. Cray Jr.
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Ana Karolina Reis MENDONÇA, Luana Pinheiro Guerra FONTOURA, Thaynara Domingos da ROCHA, Rocharles Cavalcante FONTENELE, Tereza Nicolle Burgos NUNES, Romulo Rocha REGIS, Lívia Maria Sales PINTO-FIAMENGUI
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Ricardo Luiz de Barreto Aranha, Renata de Castro Martins, Diego Rodrigues de Aguilar, Johana Alejandra Moreno-Drada, Woosung Sohn, Carolina de Castro Martins, Mauro Henrique Nogueira Guimarães de Abreu, Vincenzo Grassia
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Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology.2020; 129(2): 125. CrossRef

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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

Abstract PDF PubReader ePub

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.

Citations

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Research Article

Employment and occupation effects on late-life depressive symptoms among older Koreans: a cross-sectional population survey: Hyun Park, Young Hwangbo, Yong-Jin Lee, Eun-Chul Jang, Wook Han; Ann Occup Environ Med 2016;28:22. Published online May 14, 2016; DOI: https://doi.org/10.1186/s40557-016-0107-2

Abstract PDF PubReader ePub

Background

The present study investigated the prevalence of depressive symptoms in older Koreans and identified associations between depressive symptoms and occupational factors.

Methods

Data from the Korean National Health and Nutrition Examination Survey V (2010–2012) were used to analyze 7320 participants aged 55 years or older. Complex sample logistic regression analysis was performed after adjusting general characteristics to determine associations between depressive symptoms and occupational factors.

Results

Among older Korean men, the prevalence of depressive symptoms in the employed and the non-employed groups were 9.9 % and 13.7 %, respectively. Employment status was significantly associated with depressive symptoms after adjusting for general factors (OR: 0.69, 95 % CI: 0.49–0.97). Among older Korean women, the prevalence of depressive symptoms in the employed and the non-employed groups were 17.4 % and 20.3 %, respectively, but employment status was not significantly associated with depressive symptoms. Second skill level occupational groups (clerks, plant and machine operators) in particular showed significantly lower prevalence of depressive symptoms than the non-employed group of men (9.3 % vs 13.7 %). By occupation type, the odds ratios were 0.31 (95 % CI: 0.10–0.97, clerks) and 0.47 (95 % CI: 0.23–0.86, plant and machine operators) adjusting for general factors.

Conclusions

The employed group showed lower late-life depressive symptom prevalence than the non-employed group among older Korean men. In addition some second skill level occupations (clerks, plant and machine operators) were significantly associated with a lower risk of depressive symptoms after adjusting for general factors in older Korean men.

Citations

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