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本研究为十年(1972年-1981年)回顾性前瞻队列调查和部分病例配对调查。共调查焦化、碳素、煤气、石油、化工、有色冶金、非金属矿、染料、合成纤维、合成树脂、石棉、喷漆、制鞋、漂染、炼砷、机械、钢铁17种行业,456个厂矿的1年以上工龄的工人93,500名,988,572人年。调查的化学物质为多环芳烃、氯甲醚、石棉、联苯胺、苯、氯乙烯、铬砷8种。对照组为63,000名、646744人年(因对化学物多环芳烃的调查是几组共用一个企业做对照,故对照组人数少于调查组)。对照的条件是不接触任何已知致癌物或可疑致癌物,其他要求与调查组近似。
This study was a retrospective prospective cohort and partial case-paired surveys of ten years (1972-1981). Coking, carbon, gas, petroleum, chemical, non-ferrous metallurgy, non-metallic mineral, dye, synthetic fiber, synthetic resin, asbestos, painting, footwear, dyeing and dyeing, refining arsenic, machinery, steel 17 kinds of industries, 456 factories and mines Of the 93,500 workers with a working age of 1 year or more, 988,572 person-years. The chemical substances investigated were polycyclic aromatic hydrocarbons, chloromethyl ether, asbestos, benzidine, benzene, vinyl chloride and chromium arsenic. The control group was 63,000 with 646,744 person-years (the control group was smaller than the survey group because of the survey of PAHs among several groups sharing a single enterprise). The control is not exposed to any known carcinogens or suspected carcinogens, other requirements similar to the investigation team.