Annals of Occupational and Environmental Medicine

Yong Hee Cheon

8 Articles

Factors Affecting Dyspnea in Retired Coal Miners in Korea: Yong Hee Cheon, Sei Jin Chang, Bong Suk Cha; Korean Journal of Occupational and Environmental Medicine 2001;13(3):286-295. Published online September 30, 2001; DOI: https://doi.org/10.35371/kjoem.2001.13.3.286

Abstract PDF: OBJECTIVES
This study was done to examine the risk factors for the dyspnea of retired coal miners in Korea.
METHODS
Eight hundred and sixteen male workers who took the health examination for retired coal miners in the T hospital were recruited, in this study and their health examination records were employed to assess the risk factors for dyspnea. Both univariate and multiple logistic regression analyses were used to estimate the relationship between known risk factors and the presence of dyspnea.
RESULTS
Variables in the univariate analysis, which showed a significant relationship with dyspnea were age(>or=60 years) (OR : 2.20, 95% CI : 1.63-3.00), work duration(>or=2 0 years) (OR : 1.67, 95% CI : 1.24-2.25), profusion of small opacity(>or=1/0) (OR : 1.81. 95% CI : 1.30-2.51), large opacity(>or=A) (OR : 2.19, 95% CI : 1.30-3.70), and the ratio of the distance between the start of the first division of the right and left main pulmonary arteries divided by the transverse diameter of the thorax (cor pulmonale index)(>or=0 . 3 6 ) (OR : 2.37, 95% CI : 1.77-3.17). The multivariate analysis using logistic regression analysis showed age(>or=60 years)(OR : 1.69, 95% CI : 1.28-2.21), smoking amount(>or=1 filters/day) (OR : 1.61, 95% CI : 1.06-2.45), no experience of having quit smoking (OR : 1.40 95% CI : 1.06-1.84), and the cor pulmonale index(>or=0.36)(OR : 1.75, 95% CI : 1.34-2.29) were associated with an increased risk for dyspnea.
CONCLUSIONS
These results suggests that the cor pulmonale index is the most significant risk factor in predicting dyspnea in retired coal miners. In addition, this study also revealed that workers aged 60 years or more or smokers were more likely to experience dyspnea as compared to those aged 60 years or less and nonsmokers.

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The Incidence Rate of the Pneumoconiosis among Retired Coal Miners: Yong Hee Cheon; Korean Journal of Occupational and Environmental Medicine 2000;12(1):93-98. Published online March 31, 2000; DOI: https://doi.org/10.35371/kjoem.2000.12.1.93

Abstract PDF: OBJECTIVES
The incidence rate of pneumoconiosis among retired coal miners was studied at Taebackchungang hospital.
METHODS
Newly developed pneumoconiosis0=1/0) cases were gathered from films of ex-coal miners who were diagnosed as normal at the previous examination after retirement.
RESULTS
228 exminers were confirmed as normal at the previous examination after retirement. 37 ex-miners were diagnosed as pneumoconiosis (equal or greater than 1/0) at the next examination.
CONCLUSIONS
The incidence rate was 29.5/1000 person-year. The incidence was calculated by the examined year. In 1995, 1996, 1997, the incidence rates were 104. 8, 37. 1, 14.1 per 1000 person-year respectively. There was no development of pneumoconiosis among retired coal miners who retired more than 20 years ago or who worked less than 10 years.

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Radiological discrimination of cor pulmonale with pulmonary function and electrocardiography finding in coal workers pneumoconiosis: Yong Hee Cheon; Korean Journal of Occupational and Environmental Medicine 1996;8(3):446-453. Published online December 31, 1996; DOI: https://doi.org/10.35371/kjoem.1996.8.3.446

Abstract PDF: The radiological finding, pulmonary ventilatory function test data, electrocardiography data were used for the study of relationship between these variables in cor pulmonale and normal group in coal Workers pneumoconiosis. The hospital records of 674 men who were diagnosed as coal workers pneumoconiosis were analysed. The ratio between interhilar distance and thoracic transverse diameter was used as a criterion in grouping of cor pulmonale. If. the ratio is greater than 0.36, it was classified, to cor pulmonale. The squared canonical correlation of pulmonary function variable to cor pulmonale grouping was less than 0.15. Logistic regression analysis with pulmonary function variable and electrocardiographic variable showed sensitivity 50.5%, specificity 72.2%, correctness 62.2%. Vital capacity and Forced vital capacity showed significantly decreased value in cor pulmonale group after adjustment of covariates( age, degree of dyspnea, pack-years of smoking, perfusion of small and large opacity).

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Follow up Lower Back Pain Management Method in Lower Back Pain Complaining Workers of Kyungin Area: Yong Hee Cheon; Korean Journal of Occupational and Environmental Medicine 1995;7(1):3-9. Published online February 28, 1995; DOI: https://doi.org/10.35371/kjoem.1995.7.1.3

Abstract PDF: Nine hundred and twelve workers who complained low back pain(LBP) were interviewed. After one year, 483 workers were followed showed improvement of LBP symptom. In the case of job change, it showed improvement rate of 91.2%. In case of exercise theraphy, 82.8% of workers showed improved symptom. Medical care(Clinical medication, physical theraphy and folk medicine) group showed 63.2% of improvement rate. In the presence of sciatic pain on the time of first interview, the improvement rate of LBP was lower than the absent group.

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Radiological Findings of Low Back Pain Complainers in Some Part of Kyungin area workers: Yong Hee Cheon; Korean Journal of Occupational and Environmental Medicine 1994;6(1):26-31. Published online February 28, 1994; DOI: https://doi.org/10.35371/kjoem.1994.6.1.26

Abstract PDF: Preliminary survey of low back pain(LBP) was conducted from 7,668 workers of some part of Kyungin area. Among them, 1,183 workers complained LBP. If we do not mind X-ray findings, the prevalence rate of LBP was 15.4%. Lumbar series(anterior-posterior view, lateral view, both oblique view) were take from 973 workers who complained LBP. Three radiological findings which are not related with congenital anomaly or definite trauma-degenerative spondylitis, flattening of the lumbar spine, decreased intervertebral disc space were selected. In the group of degenerative spondylitis, the prevalence rate was relatively high after thirties in both sex. In female, prevalence rate was more higher in 5th and 6th decades than other decades. In the case of flattening of lumbar spine, the prevalence rate was relatively high in 2nd, 3rd and 4th decades in both sex. In case of decreased intervertebral disc space, there was no specific prevalent age group in both sex.

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Chronic fatigue syndrome in workers of Bucheon, Kimpo and Bupyung area: Yong Hee Cheon; Korean Journal of Occupational and Environmental Medicine 1993;5(2):233-238. Published online September 30, 1993; DOI: https://doi.org/10.35371/kjoem.1993.5.2.233

Abstract PDF: No abstract available.

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Toxic encephalopathy in a worker exposed to organic solvents; a case report: Yong Hee Cheon; Korean Journal of Occupational and Environmental Medicine 1991;3(2):216-219. Published online November 30, 1991; DOI: https://doi.org/10.35371/kjoem.1991.3.2.216

Abstract PDF

No abstract available.

Citations

Citations to this article as recorded by

Occupational Neurological Disorders in Korea
Eun-A Kim, Seong-Kyu Kang
Journal of Korean Medical Science.2010; 25(Suppl): S26. CrossRef
Occupational Neurologic Disorders in Korea
Yangho Kim, Kyoung Sook Jeong, Yong-Hun Yun, Myoung-Soon Oh
Journal of Clinical Neurology.2010; 6(2): 64. CrossRef

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2 Crossref

ECG Sign of Cor Pulmonale in Coal Workers' Pneumoconiosis Died from Cardio-respiratory faiture: Yong Hee Cheon, Kye Chul Shin; Korean Journal of Occupational and Environmental Medicine 1990;2(1):71-74. Published online February 28, 1990; DOI: https://doi.org/10.35371/kjoem.1990.2.1.71

Abstract PDF: Electrocardiographic sign was studied for the evaluation of the state of Corpulmonale in coal workers' pneumoconiosis who were admitted and dead as complication of CWP in Don-ghae hospital, Fourty-eight cases were gatherpd. The prevalence rate of right axis deviation was 28.3%. p-pulmonale in lead II was 30.4%, R/S< or =1 in V5 was 23.9. But che pulmonary artereal pressure can be increased without the change of ECG. so the elortrocardiugraphical sign should be treated as reference data.

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