作者根据详细的职业史和死亡登记资料,对1967年前在瑞典一家铜冶炼厂至少工作3个月的所有男工,进行了回顾性调查。观察年限1950～1981年。共有冶炼工人3832名(队列A),其中在1950～1974年间有3年及以上明确的高浓度铅接触史者437名(队列B)。从1950年起,B组工人有定期的血铅测定资料,并可计算1950～1974年间每名工人的年平均血铅值, Based on detailed occupational history and registration data, the authors conducted a retrospective review of all male workers who had worked at a copper smelter in Sweden for at least three months before 1967. The observation period from 1950 to 1981. There were 3832 smelting workers (Cohort A), of whom 437 were identified as high-concentration lead exposures of 3 years or more between 1950 and 1974 (Cohort B). Since 1950, workers in group B have regular blood lead measurement data and can calculate the average annual blood lead level of each worker from 1950 to 1974,