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This report is the second phase of a study of the mortality of most
workers employed at
four Federal nuclear plants in Oak Ridge Tennessee
between 1943 and 1984. In the first phase the analysis was limited to
white males who were employed only during the World War II era when
radiation monitoring programs were in the developmental stages
. Workers were assigned a relative radiation exposure
index based on job and department codes and were designated as
``probably exposed'' or ``probably non-exposed''. Additional factors
considered in the analyses were socioeconomic status, place of
employment, length of employment, birth year, and period of follow-up.
The place of employment is an important exposure-related variable
since the type of radiation exposure was different at each facility.
Previous dose-response studies have been limited to subgroups of white
males and have excluded individuals that were employed at more than
one facility after 1947 [2,3]. Mortality study results
for white males employed only at X-10 with follow-up through 1984 have
also been reported in combination with populations of workers employed
at other Department of Energy (DOE) facilities .
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