Epidemiologic study of workers exposed to XXXX .

@entity5 @entity1 @entity334
This retrospective cohort study of 1,345 male employees with potential for exposure to @entity334 analyzes @entity5 incidence and mortality from 1956 to 1976. Expected numbers based on company and national rates have been computed on @entity1 -years. The analyses consider calendar time, payroll classification, occupation, duration of exposure, severity of exposure, and latency. Overall, 25 cases of @entity5 occurred, with 20.5 expected based on company rates. Of these, eight were @entity5 cases, with 4.4 expected. Excesses were found primarily during the 1970-76 time period among wage roll employees who had worked during plant start-up. A trend toward increased risks was seen with increased duration and severity of exposure. Twenty @entity5 deaths were found, with 17.4 expected according to company rates. Since many @entity5 cases were recently diagnosed and are living, it may be premature to evaluate mortality statistics. These findings, coupled with results from tests in laboratory animals, raise the serious suspicion that @entity334 may be a @entity1 carcinogen.
