Annals of Occupational and Environmental Medicine

Research Article

Effect of teacher’s working conditions on voice disorder in Korea: a nationwide survey: Yi-Ryoung Lee, Hyoung-Ryoul Kim, Seyoung Lee; Ann Occup Environ Med 2018;30:43. Published online July 3, 2018; DOI: https://doi.org/10.1186/s40557-018-0254-8

Background

Korean teacher’s working conditions are deteriorating. There is concern about the deterioration of teachers’ health and voice disorder is one of the most common problems. Teacher’s vocal health is important for them and their students. The aim of the present study was to investigate working conditions that may affect voice disorders.

Methods

In all, 79 primary and secondary schools were randomly selected for a nationwide school system survey (N = 3345). In 64 schools, 1617 (48.3%) teachers participated via a postal self-report questionnaire from June 2016 to August 2016. After applying inclusion and exclusion criteria, data from 1301 teachers’ were used for analysis. Multiple logistic regression was used to investigate the associations between general, work-related factors, and frequent voice disorders (fVDs) to estimate the adjusted odds ratio(aOR).

Results

Teachers who reported voice symptoms more than once a week (fVD) made up 11.6%. In a multiple logistic regression, fVD was significantly associated with female, difficulty in applying for sick leave as needed, music teachers (primary school), and less than 6 h of sleep per day (primary school). The aOR for fVD was 2.72 (0.83–8.10) in the longest working hours group (> 52 h/wk) among the primary school teachers, and 1.90 (0.80–4.73) in the longest class hour group (≥ 20 h/wk), 1.52 (0.90–2.62) in homeroom teachers among the secondary school teachers, but not statistically significant.

Conclusions

Korean teachers’ working conditions are associated with fVDs. The school health system must take steps to prevent and treat voice disorders of teachers.

Citations

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Research Article

Sleepiness while driving and shiftwork patterns among Korean bus drivers: Seyoung Lee, Hyoung-Ryoul Kim, Junsu Byun, Taewon Jang; Ann Occup Environ Med 2017;29:48. Published online October 9, 2017; DOI: https://doi.org/10.1186/s40557-017-0203-y

Abstract PDF PubReader ePub

Background

Sleepiness while driving has been regarded as a major cause of death due to traffic accidents. We compared the degree of sleepiness across five different working time periods (first, morning, post-lunch, afternoon, and last) among Korean bus drivers with different shift types (Daily two shift/Alternating day shift).

Method

We interviewed 332 bus drivers with two shift types (Daily two shift, 128; Alternating day shift, 204). The questionnaire included demographic information (age, alcohol consumption and history of disease), a sleep disorder diagnosed by a doctor, job duration, the number of workdays in the past month, average working hours per workday and week, sleepiness while driving (Karolinska Sleepiness Scale), and sleeping time for both workdays and off-days. We conducted log-binomial regression analyses and produced prevalence ratios (PRs) of severe sleepiness (KSS ≥ 7) while driving with 95% confidence intervals (95% CI) to identify the difference in sleepiness for five working times between both groups.

Results

For the first and morning periods, there were no statistically significant differences in the KSS scores between the two groups. However, from lunch to last driving, drivers with Alternating day shift had a much larger proportion of severe sleepiness than those on Daily two shift. Thirteen (10.2%), 2 (1.6%) and 7 (5.5%) Daily two shift workers reported severe sleepiness in the post-lunch, afternoon and last periods. In contrast, 81 (39.7%), 63 (30.9%) and 64 (31.4%) of Alternating day shift drivers experienced severe sleepiness during the post-lunch, afternoon and last driving periods (p < 0.0001). According to the log-binomial regression analyses, Alternating day shift was associated with severe sleepiness from lunch to last driving. After adjusting for job duration, alcohol consumption and sleeping time on workdays, the PRs were 3.97 (95% CI: 2.29–6.90) post-lunch, 18.26 (95% CI: 4.51–73.89) in the afternoon and 5.71 (95% CI: 2.51–12.99) for the last driving period.

Conclusion

We found that Alternating day shift bus drivers suffered from more sleepiness while driving from lunch to last driving than Daily two shift bus drivers. This difference may be because Alternating day shift drivers had more irregular work schedules and longer working hours per day and week.

Citations

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Mental health outcomes among urban public transport workers: A systematic literature review
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Journal of Transport & Health.2024; 36: 101804. CrossRef
Effects of Sleep Deprivation and Hazard Types on the Visual Search Patterns and Hazard Response Times of Taxi Drivers
Long Sun, Meiqi Zhang, Yuanbo Qiu, Changlu Zhang
Behavioral Sciences.2023; 13(12): 1005. CrossRef
The Effect of Different Road Types on Timber Truck Drivers by Assessing the Load Environment of Drivers by Monitoring Changes in Muscle Tension
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Shift Work as a Risk Factor for Poor Sleep Quality and Daytime Sleepiness in Khorasan Railway Personnel in Iran
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Research gaps and needs for preventing worker fatigue in the transportation and utilities industries
W. Karl Sieber, Guang X. Chen, Gerald P. Krueger, Jennifer E. Lincoln, Cammie C. Menéndez, Mary B. O'Connor
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Sleep Disorders and Risk of Motor Vehicle Accident
Soo Hwan Yim, Jae Wook Cho, Jun-Sang Sunwoo, Daeyoung Kim, Dae Lim Koo, Hee-Jin Im, Hyeyun Kim, Kyung Min Kim, Kwang IK Yang
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Javier Llamazares, Sergio A. Useche, Luis Montoro, Francisco Alonso
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Shiftwork-Mediated Disruptions of Circadian Rhythms and Sleep Homeostasis Cause Serious Health Problems
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Research Article

Participation inequality in the National General Health Examination based on enterprise size: Young Joong Kang, Jong Heun Park, Huisu Eom, Bohwa Choi, Seyoung Lee, Ji-Won Lee, Jun-Pyo Myong; Ann Occup Environ Med 2017;29:3. Published online February 22, 2017; DOI: https://doi.org/10.1186/s40557-017-0159-y

Abstract PDF PubReader ePub

Background

Health examinations are performed so that diseases can be identified and treated earlier. Several studies have evaluated the determinants of participation in health examinations including cancer screening, but few have evaluated the relationship between the size of the enterprise and their participation in Workers’ General Health Examinations (WGHE). The aim of the present study was to estimate the association of WGHE participation with the size of the enterprise and the type of policyholder.

Methods

The eligible population from 2006 through 2013 was extracted from the National Health Insurance Service (NHIS) database. The population size ranged from 14–17 million. After adjustment for age and gender, multiple logistic regression analysis was performed to estimate the odds ratios of participating in the WGHE (by age group) based on the type of policyholder (reference: public officers) and the size of the enterprise (reference: enterprise size ≥300 employees), respectively.

Results

Workers employed at enterprises with <50 persons were less likely to participate in WGHEs than those employed at enterprises with ≥300 persons. After policyholders were stratified by type (non-office workers vs. public officers), a disparity in the WGHE participation rate was found between the different types of policyholders at enterprises with <50 employees (reference: those employed at enterprises with ≥300 employees); the odds ratios for subjects in their 40s and 50s were 0.2–0.3 for non-office workers vs. 0.8–2.0 for public officers.

Conclusion

Workplace policyholders at small enterprises comprised a vulnerable group less likely to participate in WGHEs. Efforts should be made to raise the WGHE participation rate among the vulnerable employees belonging to small enterprises, as well as among their dependents.

Citations

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Income-based inequality in nationwide general health checkup participation in Japan
A. Shimoda, Y. Saito, C. Ooe, N. Kondo
Public Health.2021; 195: 112. CrossRef
Employment conditions and use of gastric cancer screening services in Korea: a nationwide survey
Hye-Young Shim, Jae Kwan Jun, Ji-Yeon Shin
BMC Public Health.2019;[Epub] CrossRef
Factors Associated with General Health Screening Participation among Married Immigrant Women in Korea
Jinhee Jeong, Yunhee Lee, Sung Hee Kwon, Jun-Pyo Myong
International Journal of Environmental Research and Public Health.2019; 16(20): 3971. CrossRef
Healthcare consumers’ sensitivity to costs: a reflection on behavioural economics from an emerging market
Quan-Hoang Vuong, Tung-Manh Ho, Hong-Kong Nguyen, Thu-Trang Vuong
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The roles of doctors, nurses, and industrial hygienists in the healthcare management services in Korea: a comparison of the opinions of specialized health management institutions and entrusted enterprises
Bo-Young Jang, Dong-Mug Kang, Young-Ki Kim, Se-Young Kim, Kyung-Sun Ko
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef

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Case Report

Diagnosis of perinuclear anti-neutrophil cytoplasmic antibody-associated microscopic polyangiitis in silicotics: case report: Ji-Won Lee, Jun-Pyo Myong, Yeong-Jin Choi, Seyoung Lee, Bum Seak Jo, Jung-Wan Koo; Ann Occup Environ Med 2016;28:21. Published online May 14, 2016; DOI: https://doi.org/10.1186/s40557-016-0108-1

Abstract PDF PubReader ePub

Background

An association between silica exposure and autoimmune diseases including rheumatoid arthritis, systemic sclerosis, systemic lupus erythematosus, and anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis has been made.

Case presentation

A 56-year-old male presented with silicosis and had an occupational history of precious metal processing for 30 years and a 30 pack-year smoking history. The patient was diagnosed with pneumoconiosis and received compensation. No other complications were reported for pneumoconiosis. The patient suddenly presented with a non-specific headache for several days and microscopic hematuria was identified upon examination in the outpatient clinic. Following several weeks, the patient presented with aggravated dyspnea and hemoptysis, and his Modification of Diet in Renal Disease estimated glomerular filtration rate indicated acute kidney injury. Diagnostic analysis revealed perinuclear ANCA-associated microscopic polyangiitis (p-ANCA-associated MPA).

Conclusion

Exposure to silica dust was likely one of the cause of p-ANCA-associated MPA. Possible pathogenic mechanisms of autoimmune diseases in silicotics and emphasis of the necessity for early diagnosis are discussed.

Citations

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Occupational Silica Exposure as a Potential Risk for Microscopic Polyangiitis
Alper Alp, Melike Ersoy, İbrahim Meteoğlu, Nesibe Kahraman Çetin, Hakan Akdam, Yavuz Yeniçerioğlu
Wilderness & Environmental Medicine.2023; 34(4): 543. CrossRef
Renal involvement in a silicosis patient – case report and literature review
Fei-Fei Chen, Hai-Yan Tang, Feng Yu, Cheng-Li Que, Fu-de Zhou, Su-Xia Wang, Guang-Fa Wang, Ming-Hui Zhao
Renal Failure.2019; 41(1): 1045. CrossRef
IL-10-Producing B Cells Suppress Effector T Cells Activation and Promote Regulatory T Cells in Crystalline Silica-Induced Inflammatory Response In Vitro
Yiping Lu, Fangwei Liu, Chao Li, Ying Chen, Dong Weng, Jie Chen
Mediators of Inflammation.2017; 2017: 1. CrossRef

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