The purpose of this study was to investigate the effect of hospitalization and diagnosis of disease on the mental health of coal workers' pneumoconiosis patient. The study subjects were composed of four groups for comparison; hospitalized coal workers' pneumoconiosis, healthy coal miners, and railroad workers employed by government. About a hundred of respondents in each group were sampled by random. Mental health data were collected by symptom distress checklist 90 (SCL-90), and other characteristics were collected by interview with questionnaire administered trained interviewers in each respondents.
Mental health dimension was classified into 9 dimensions; somatization, obsessive-compulsiveness, interpersonal sensitivity, depression, anxiety, hostality, phobic anxiety, paranoid, psychosis. And as total index, global severity index, positive symptoms total, positive symptom distress index were also computed.
As a result there is difference of mean score of 9 symptom dimensions among four groups. The mean score of the examinees of depth diagnosis of the impressed coal workers' pneumoconiosis is the highest score in all 9 symptom dimensions. However in the hospitalized coal workers' pneumoconiosis scores of somatization, depression, anxiety, and phobic anxiety were still higher than that of healthy coal miners. And other symptom dimensions were not different from that of healthy coal miners.
Many physical and psychological problems, involved in shiftwork were noted, including peptic ulcer, rheumatoid arthritis, sleep disturbances, anxiety, etc. But emotional and psychological problems in nighttime workers were not sufficientiy investigated. To evaluate psychological problems encountered by night duty workers, Symptom Checklist-90-Revision was administered to 61 workers, including 47 night duty workers and 14 ordinary daytime workers, and the results of the both groups were compared.
1. Of 9 symptom dimensions, depression and hostility showed significantly higher scores in night duty workers.
2. Three global indicies(GSI, PST, PSDI) of night duty workers were higher than those of daytime workers, but statistically not significant.
3. Scores in all symptom dimensions, except somatization and hostilithy, of investigation group were lower than those of norm group.
4. In night duty workers, duration of night-time work per day was positively correlated with depression, anxiety, phobic anxiety and psychoticism.
From the above results, it was suggested that psychological health maintenance program should be developed for night duty workers.
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