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对某矿１９５０～１９５３年间新招井下接尘工人２３２０人，进行长达４３年的回顾性队列调查研究，应用计算人年发病率的方式，动态反映其发病程度。结果为：尘肺总患病率为２０５６０‰。工种人年发病串依次为：纯掘（１３．７０‰）、主掘（ｌ．５７‰）、主采（６．８６‰
A retrospective cohort study was conducted on 2320 workers receiving mines in the mine from 1950 to 1953 for a total of 43 years. The annual incidence rate of people was calculated to dynamically reflect the incidence of the disease. The result was: The total prevalence of pneumoconiosis was 20560 ‰. The annual incidence of traumatic workers were as follows: pure dig (13.70 ‰), main dig (l.57 ‰), the main mining (6.86 ‰