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KMID : 0381319840230030053
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Korean Journal of Occupational Health
1984 Volume.23 No. 3 p.53 ~ p.61
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Exercise Index in Coal Worker´s Pneumoconiosis
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정치경/Chung, Chee Kyung
유재인/문우기/김세곤/조영선/Yoo, Jae In/Moon, Woo Ki/Kim, Sei Kon/Cho, Yung Sun
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Abstract
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Exercise index(EI) was measured on 933 pneumoconiosis patients (865 patients with small rounded opacities and 68 patients with large opacities) and 176 suspected pneumoconiosis patients from Korean anthracitic mines, in order to evaluate the ventilatory impairment of pulmonary function according to the chest radiographic findings of pneumoconiosis.
Exercise index was obtained from the maximum breathing capacity (MBC) and the exercise ventilation volume(EV) which were measured by spirometer and two step-test. Classification of pneumoconiosis was based on the international classification of ILO U/C.
The results were as follows:
1. The mean value of EI was significantly increased in pneumoconiosis patients with large opacities(46.0％) than in patients with small rounded opacities(26.5％) and with suspected pneumoconiosis(25.0％). The number of patients in substandard EI was 97.1％ in patients with large opacities but 49.4％ in patients with small rounded opacities and 40.3％ in patients with suspected pneumoconiosis.
2. The mean values of EI and the number of patients in substandard EI were markedly increased in pneumoconiosis patients with small rounded opacities and suspected over 50 years of age. However, the number of patients in substandard EI showed no association with age in pneumoconiosis patients with large opacitis.
3. In pneumoconiosis patients with small rounded opacities, the mean values of EI and the number of patients in substandard EI showed significant association with the profusion(category) but no significant association with the type of small rounded opacities.
4. In pneumoconiosis patients with large opacities, the mean values of EI and the number of patients in substandard EI showed no significant difference between patients complicated with and without pulmonary tuberculosis.
5. No significant association of EI and the number of patients in substandard EI with the size of large opacities was observed in pneumoconiosis patients with large opacities, however, the mean values of EI showed increasing tendency in category B and C compared to category A.
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