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KMID : 0381319710100010029
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Korean Journal of Occupational Health
1971 Volume.10 No. 1 p.29 ~ p.34
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Epidemiological study on the incidence of pneumoconiosis
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Abstract
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⑴ Dust concentrations in working places of Korean coal mines exceed 5 to 70 times as high as the recommended threshold limit value of dust.
⑵ It is estimated that 1,300 to 2,300 pneumoconiosis cases may exist among Korean coal miners based on the data obtained from the study.
⑶ Prevalence rate of pneumoconiosis is the highest among workers who have over 10 years of working experience in dusty coal mines. Despite a fact that pneumoconiosis case is seldom found nowadays in the developed countries among workers whose working experience is less then 5 years, a quite number of cases are found among workers with less than 5 years of working experience. Moreover, it is evident from the fact that pneumoconiosis case even in the third stage are found among workers with a few years of working experience, pneumoconiosis can be occurred within a short period of time when workers are wxposed to high concentration of dust.
⑷ It is anticipated that pneumoconiosis cases will occur unless the working environment is improved, when coal miners are getting old, as the prevalence rate shows the highest among a group of workers aged 35 to 50 years.
⑸ The commonest complication with pneumoconiosis is pulmonary tuberculosis showing the rate of 25.7％, that is, nearly 8 times as high as that of pulmonary tuberculosis among Korean general population. Besides, Pulmonary emphysema, bronchiectasis, cor pulmonale, pleurisy and lung abscess can be seen as complications of pneumoconiosis.
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