Annals of Occupational and Environmental Medicine

Research Article

Ventilation impairment of residents around a cement plant: Sul Ha Kim, Chul Gab Lee, Han Soo Song, Hyun Seung Lee, Min Soo Jung, Jae Yoon Kim, Choong Hee Park, Seung Chul Ahn, Seung Do Yu; Ann Occup Environ Med 2015;27:3. Published online January 24, 2015; DOI: https://doi.org/10.1186/s40557-014-0048-6

Objectives

To identify adverse health effects due to air pollution derived from a cement plant in Korea. The ventilation impairment in residents around a cement plant was compared to another group through a pulmonary function test (PFT).

Methods

From June to August of 2013, both a pre and post-bronchodilator PFT was conducted on a “more exposed group (MEG)” which consisted of 318 people who lived within a 1 km radius of a cement plant and a “less exposed group (LEG)” which consisted of 129 people who lived more than 5 km away from the same plant. The largest forced expiratory volume in a one second (FEV1) reading and a functional residual capacity (FVC) reading were recorded after examining the data from all of the usable curves that were agreed upon as valid by PFT experts of committee of National Institute of Environmental Research. The global initiative for chronic obstructive lung disease (GOLD) criteria for COPD, defined the FEV1/FVC ratio < 0.7 as the obstructive type, and the FEV1/FVC ratio ≧ 0.7 and FVC% predicted < 80% were as the restrictive type. The FVC% predicted value was estimated using Korean equation. We compared the proportion of lung function impairments between the MEG and the LEG by using a chi-square, and estimated the OR of obstructive and restrictive ventilation impairments by logistic regression.

Results

The obstructive type impairment proportion was 9.7% in the MEG, whereas it was 8.5% in the LEG. The restrictive type was 21.6% in the MEG which was more than the 12.4% of the LEG. The odds ratio (OR) of total ventilation impairment in the MEG was 2.63 (95% CI 1.50 ~ 4.61) compared to the LEG. The OR of obstructive type in the MEG was 1.60 (95% CI 0.70 ~ 3.65), the smoking history was 3.10 (CI 1.10 ~ 8.66) whereas OR of restrictive type in the MEG was 2.55 (95% CI 1.37 ~ 4.76), the smoking history was 0.75 (95% CI 0.35 ~ 1.60) after adjusting for sex and age. Level of exposure to particulate played a role in both types. However, it appeared to be a significant variable in restrictive type, while smoking history was also an important variable in obstructive type.

Conclusion

Although this study is a limited cross-section study with a small number of subjects, ventilation impairment rate is higher in the MEG. There might be a possibility that it is due to long-term exposure to particulate dust generated by the cement plant.

Citations

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A numerical study on airflow and particle transport characteristics of subjects with cement dust exposure
Jimin Hwang, Woo Jin Kim, Kum Ju Chae, Gong Yong Jin, Chang Hyun Lee, Xinguang Cui, Sanghun Choi
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Assessing heavy metal contamination and health risks in playground dust near cement factory: exposure levels in children
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The Effect of Cement Dust Exposure on Lung Function among Cement Factory Workers
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Atmosphere.2020; 11(8): 881. CrossRef
Exposure effect to cement dust pollution: a mini review
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Jean-François Jusot, Daniel R. Neill, Elaine M. Waters, Mathieu Bangert, Marisol Collins, Laura Bricio Moreno, Katiellou G. Lawan, Mouhaiminou Moussa Moussa, Emma Dearing, Dean B. Everett, Jean-Marc Collard, Aras Kadioglu
Journal of Allergy and Clinical Immunology.2017; 139(3): 977. CrossRef
Increased incidence of respiratory tract cancers in people living near Portland cement plants in Korea
Sang-Yong Eom, Eun-Bi Cho, Moo-Kyung Oh, Sun-Seog Kweon, Hae-Sung Nam, Yong-Dae Kim, Heon Kim
International Archives of Occupational and Environmental Health.2017; 90(8): 859. CrossRef
Air pollution and urinary n-acetyl-B-glucosaminidase levels in residents living near a cement plant
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Annals of Occupational and Environmental Medicine.2016;[Epub] CrossRef

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Research Article

Cardiovascular Disease Risk of Bus Drivers in a City of Korea: Seung Yong Shin, Chul Gab Lee, Han Soo Song, Sul Ha Kim, Hyun Seung Lee, Min Soo Jung, Sang Kon Yoo; Ann Occup Environ Med 2013;25:34-34. Published online November 11, 2013; DOI: https://doi.org/10.1186/2052-4374-25-34

Abstract PDF PubReader ePub

Objective

To prevent the occurrence of CV events such as MI and stroke among professional drivers in Korea, bus drivers were compared to other occupations through the Framingham risk scoring system (FRS) or metabolic syndrome (MS) of cardiovascular disease (CVD) risk assessment methods.

Methods

In October 2012, a health examination survey was conducted for 443 male bus drivers in a big city. Their CVD risk factors were compared to those of a ‘total employed’ (A group) and ‘crafts and machine operators’ (B group) extracted from Fifth Korea National Health and Nutrition Examination Survey (KNHANES, 2010) data by using FRS and MS. We calculated proportions of the CVD risk factors distribution between bus drivers and the A, B groups by the bootstrapping method. The Odds ratio (OR) between CV event risk combining MS with CHD equivalent risk of FRS and occupational factors like shift patterns and professional driving duration/age ratios (PDAR) of bus drivers was calculated through multinominal logistic regression.

Results

The proportion of BMI ≥ 25 kg/m² was 53.9% and waist circumference ≥ 90cm was 40.9% among bus drivers. Hypertension and MS prevalence of bus drivers was 53.3%, 49.9% which is higher than 17.6%, 22.6% in the A group and 19.7%, 23.8% in the B group respectively. OR of high CV event risk in alternate shift was 2.58 (95% CI 1.33~5.00) in comparison with double shift pattern and OR in PDAR ≥ 0.5 was 2.18 (95% CI 1.15~4.14).

Conclusion

Middle aged male drivers in a big city of Korea stand a higher chance of developing CV event than other professions of the same age.

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Original Article

Occupational Stress and MMPI-2 Profile of Workers in Some Plants Undergoing Labor Dispute: Chang Ki Choi, Chul Gab Lee, Han Soo Song, Sang Kon Yoo, Seung Yong Shin, Sul Ha Kim; Korean Journal of Occupational and Environmental Medicine 2012;24(4):384-396. Published online December 31, 2012; DOI: https://doi.org/10.35371/kjoem.2012.24.4.384

Abstract PDF

OBJECTIVES
To identify changes in relationships with superiors or colleagues at work and family members and social networks at home, based on occupational stress and psychological characteristics in during the process of restructuring some plants undergoing a long-term labor dispute.
METHODS
This study invested 213 workers involved in a long-term labor dispute using the KOSS (Korean Occupational Stress Scale) and the MMPI-2 (Minnesota Multiphasic Personality Inventory) and questionnaires. The KOSS and MMPI-2 scores in accordance with aggressiveness of trade union activity and changes in human relationships were compared. In addition, the odds ratio of whether there were differences in health behavior (perception of health status, smoking, alcohol abuse, medical treatment) and the absenteeism rate was calculated by logistic regression analysis.
RESULTS
For members of the aggressiveness of trade union activity group, the rate at which the relationship between superiors or colleagues deteriorated was high, as was the total KOSS score, occupational system and lack of reward score of KOSS subclass. The depression subclass score of MMPI-2 was generally high, while the score of hypochondriasis, hysteria, psychopathic deviate, hypomania was high, and social introversion was low in the active group. In cases in which there were high score of psychopathic deviate, hypomania and paranoia, there were also signs of negative health behavior.
CONCLUSIONS
Occupational stress caused by a long-term labor dispute, accompanied with depression can result in an aggressive, hostile and vulnerable personalities and have a negative impact on health behavior.

Citations

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Changes of depression and job stress in workers after merger without downsizing
Jun Ick Jung, Jun Seok Son, Young Ouk Kim, Chang Ho Chae, Chan Woo Kim, Hyoung Ouk Park, Jun Ho Lee, Young Hoo Shin, Jea Chul Ha
Annals of Occupational and Environmental Medicine.2018;[Epub] CrossRef
Minnesota multiphasic personality inventory as related factor for post traumatic stress disorder symptoms according to job stress level in experienced firefighters: 5–year study
In-Sung Chung, Mi-Young Lee, Sung-Won Jung, Chang-Wook Nam
Annals of Occupational and Environmental Medicine.2015;[Epub] CrossRef

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