Influence of XXXX exposure and smoking on @entity2 among smelter workers: a pilot study.

@entity1 @entity3494 @entity2
A pilot study of 300 smelter workers from the cohort reported by Lee and Fraumeni [1969] has been studied: 150 @entity1 from their heavy exposure group and 150 @entity1 from the rest of the cohort randomly selected. Usable smoking habits were obtained from 86% of the sample. Estimates of the total lifetime work exposure were made from available measurements. A very high risk of @entity2 (SMR 1429) was observed among the most heavily exposed workers. Excess risks, though still present, were much less in those with lower exposures. There was a lower proportion of nonsmokers among the heavily exposed @entity3494 workers than among the other workers. This suggests that there may be some interaction between smoking and @entity3494 exposure. Moreover, comparison of smoking habits reported by smelter workers suggested that, as a group, they smoked more heavily than average for the United States population. A small study of proxy smoking histories suggested that these were valid and unbiased. The work continues on an enlarged sample.
