| Document ID (ISN) | 46981 |
| CIS number |
86-1525 |
| ISSN - Serial title |
0387-821X - Journal of UOEH |
| Year |
1985 |
| Convention or series no. |
|
| Author(s) |
Baba Y., Iwao S., Kodama Y. |
| Title |
Follow-up study on pulmonary function of dust workers: An epidemiological evaluation of discontinued workers of dust operations |
| Bibliographic information |
Sep. 1985, Vol.7, No.3, p.257-263. Illus. 8 ref. |
| Abstract |
An epidemiologic study on 176 workers exposed to dust in various occupations was initiated in 1978. No workers complained of chronic cough or phlegm. Their chest X-rays belonged to Category I as defined by the Pneumoconiosis Law in Japan. Pulmonary function test was performed on these workers, however, 54 workers discontinued taking part in the study by the end of 1979 ("early-discontinued" group), and 49 workers had discontinued by 1981 ("late-discontinued" group). A total of 73 workers had a 5-year follow-up survey of pulmonary function. Forced expiratory volume in 1 second divided by forced vital capacity and forced expiratory flow rate at 25% of FVC divided by height were mainly compared by smoking habit, work years, type of job, size of company, and the time when they discontinued their jobs. Predicted percentage values of lung function were used for the adjustment of the influence of workers' ages. Decrements of these values in the 5-year follow-up group were larger than the 1978 level. The mean values in the early-discontinued group were lower than in the late-discontinued and active working groups. The fact that respiratory function indicators are better for the workers with longer exposure than for the early-discontinued group is a reflection of the "healthy worker effect": only the physically healthiest workers remain in jobs that present health hazards. |
| Descriptors (primary) |
healthy worker effect; functional respiratory disorders; respirable dust; ore sintering plants; insulating work; welding and cutting; long-term study; length of exposure; quarrying industry; pottery industry; foundries; bricklaying |
| Descriptors (secondary) |
respiratory function tests; epidemiologic study |
| Document type |
D - Periodical articles |
| Subject(s) |
Dust, aerosols and related diseases
|
| Broad subject area(s) |
Occupational medicine, epidemiology
|
| Browse category(ies) |
Diseases of the respiratory system (except for pneumoconiosis & similar)
Mining and quarrying
Surface treatment
Welding and cutting
Glass, pottery and related materials
Foundries, metalcasting and forging operations
|
