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We evaluated 122 outpatients who visited our hospital for examination of asbestos-related diseases between November, 2005 and October, 2006. Patients were divided into three groups; occupational exposure, non-occupational exposure and non-exposure groups. The occupational exposure group showed a significantly higher rate of asbestos-related abnormal findings than the non-occupational exposure plus the non-exposure group (33% vs. 5%, respectively; P = 0.001). Pleural plaque was the most common abnormal finding related to asbestos. Only four of 24 patients with pleural plaques could obtain personal health records for workers enjoyed in dangerous work, whereas the rest of them were not able to mainly because they were self-employed. A health support system is necessary to also cover non-employees.