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Cancer mortality patterns by work category in three Texas oil refineries
American Journal of Industrial Medicine
|January 1, 1984
Summary
Oil refinery workers showed increased risks for certain cancers. Stomach cancer was linked to maintenance and specific oil processing jobs, while leukemia showed a slight association with the Treating category. Brain tumor risk was not strongly associated with any work categories.
Area of Science:
- Occupational Health
- Epidemiology
- Environmental Health
Background:
- Previous analysis indicated elevated cancer mortality among Oil, Chemical, and Atomic Workers Union (OCAW) members in Texas oil refineries.
- Specific cancers of concern included brain tumors, stomach cancer, and leukemia.
Purpose of the Study:
- To investigate the association between specific refinery work categories and the risk of brain tumors, stomach cancer, and leukemia.
- To evaluate the findings of a prior proportionate mortality ratio analysis.
Main Methods:
- A matched case-control study design was employed using complete work histories.
- Workers were classified into broad work categories based on refinery unit operations.
- Exposure was defined as working at least one day in a category 15 or more years prior to death.
Main Results:
- No significant associations were found between work categories and brain tumor risk.
- A slight increased risk of leukemia was observed among workers in the "Treating" category.
- Elevated stomach cancer risk was identified in maintenance workers and those exposed to lubricating oils and paraffin wax processing.
Conclusions:
- Findings suggest specific occupational exposures in oil refineries may be associated with increased risk of stomach cancer and leukemia.
- Further research is warranted to elucidate the specific agents and mechanisms involved in these associations.