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Proportionate mortality study of workers in the grain industry
Journal of the National Cancer Institute
|February 1, 1987
Summary
Grain mill workers experienced higher mortality from accidents and certain blood cancers, including lymphosarcoma and multiple myeloma. Pesticide use may be a contributing factor, warranting further investigation into occupational exposures.
Area of Science:
- Occupational Health
- Epidemiology
- Toxicology
Background:
- The American Federation of Grain Millers' life insurance plan covers 1,114 white male members.
- Previous studies have not fully elucidated cancer risks within the grain milling industry.
Purpose of the Study:
- To examine the proportionate mortality and cancer mortality experience of white male members of the grain millers' union.
- To identify specific cancer types with elevated mortality risks.
- To explore potential links between occupational exposures, such as pesticide use, and observed mortality patterns.
Main Methods:
- Analysis of proportionate mortality ratios (PMRs) and proportionate cancer mortality ratios (PCMRs) from insurance plan data.
- Comparison of observed mortality rates against expected rates for the general white male population.
- Preliminary survey of pesticide usage across different grain mill facilities.
Main Results:
- Significantly elevated mortality was observed for accidents and cancers of the lymphatic and hematopoietic systems (lymphosarcoma, reticulum cell sarcoma, lymphoid tissue neoplasms, multiple myeloma).
- No increased mortality was found for respiratory tract cancers.
- Nonmalignant digestive tract diseases showed significantly lower mortality than expected.
- Grain mill employees exhibited higher mortality ratios for lymphatic and hematopoietic cancers compared to other grain industry sectors.
- A preliminary survey indicated greater pesticide usage in grain mills compared to other industrial categories, with significant facility-level variation.
Conclusions:
- The study identifies specific occupational cancer risks, particularly blood and lymphoid cancers, among grain mill workers.
- Pesticide exposure is a potential contributing factor to the observed elevated cancer mortality, necessitating further research.
- Findings suggest a need for targeted occupational health interventions and exposure monitoring in the grain milling industry.