| This analytic data file set consists of three files generated for a retrospective cohort mortality study of white males employed during 1951 to 1989 at the FMPC in Fernald, Ohio by Donna Cragle. |
| This study of white males employed between 1951 and 1989 had a total of 121,000 person-years of follow-up. Results for the combined cohort showed statistically significantly elevated standardized mortality ratios (SMRs) for all cancers combined (1.15) and prostate cancer (1.58). Investigating SMRs separately for salaried and non-salaried workers, there were notable differences between the mortality patterns of the two groups. Salaried workers had a statistically significantly increased SMR only for stomach cancer (2.61), as contrasted with all cancers combined (1.21), lung cancer (1.26), and motor vehicle accidents (1.59) for non-salaried workers. No deaths from bone sarcomas were found in either group. The healthy worker effect was evident in the statistically significant all-causes SMR of 0.71 for salaried workers. The corresponding SMR for non-salaried workers was 0.95 with an upper confidence bound of 1.01. Dose-response relationships were found only for cumulative external dose and lung cancer and for cumulative internal dose and non-malignant respiratory diseases. |
| The demographic and work history analytic file (FRC94A02_d1) contains a record that includes vital status as of January 1, 1990, for each of the 4,014 members of the cohort. There are two exposure files. FRC94A02_d2 contains annual deep doses in cGy (rads) from external radiation sources, while FRC94A02_d3 contains annual calculated lung doses in cGy from internal radiation sources. |
| The last SSA submission for this population provided "alive" status as of January 1, 1985. The "alive" category is no longer obtainable from SSA. |
| However, NDI provides a record of all deaths occurring since January 1, 1979. If not identified as deceased by SSA or NDI, individuals last known to be alive before January 1, 1979, were considered lost to follow-up on the last date known alive. Those classified as unknown after January 1, 1979, were considered alive at the end of the study. There were 1,064 deaths from all causes with death certificates available for 99.0% of these individuals. The underlying causes of death were coded for ICDA8. |
| The FMPC was involved in processing uranium ore concentrate and uranium of low grade enrichment into fabricated uranium metal products and in the production of thorium metal. Operations began in late 1951 with 85% of the cohort being hired before 1960. Employment at the facility reached its peak in 1956 and slowly decreased until operations halted in July of 1989. In addition to radiation and thorium, potential exposures included kerosene, tributyl phosphate, and other solvents. |
