对两大碳素厂共5,122名男职工进行了回顾性队列研究。观察期为1971～1981年,在此11年期间累积53,535人年。高度接触煤焦沥青挥发物工人的肺癌有明显的超出量,SRR为3.86(p<0.01)。中等接触组的肺癌 SRR为2.73(p<0.05)。高接触组在接触20年后,罹患肺癌的危险性最大。 A total of 5,122 male workers from the two major carbon plants were retrospectively cohorted. The observation period was 1971-1981, with 53,535 person-years accumulated during this 11-year period. Lung cancer in workers exposed to coal tar pitch volatiles had a significant excess of SRR of 3.86 (p <0.01). The median SRR for lung cancer was 2.73 (p <0.05) for the medium-exposure group. High-exposure group in the contact 20 years later, the greatest risk of lung cancer.