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A cohort mortality study of foundry workers

¹Department of Social Medicine, University of Copenhagen, Denmark. eva@kubism.ku.dk

American Journal of Industrial Medicine

|September 1, 1997

Summary

Danish foundry workers exposed to airborne pollutants before 1970 faced a significantly higher risk of developing serious lung diseases, including pneumoconioses and chronic obstructive pulmonary disease.

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Area of Science:

Occupational Health
Environmental Epidemiology
Pulmonary Medicine

Background:

Danish foundries historically had high levels of airborne pollutants.
Improvements in hygiene since the 1970s have reduced exposure.
This study examines mortality data from before 1970 to establish a baseline.

Purpose of the Study:

To assess the long-term mortality risks for Danish foundry workers exposed to occupational hazards prior to 1970.
To provide a baseline for evaluating the impact of improved hygiene and reduced exposure in foundries.

Main Methods:

A historical cohort mortality study comparing 3,056 foundry workers with 43,024 workers in other industries.
Analysis of lifelong risk of death and standardized mortality ratios (SMR) for specific diseases.
Statistical analysis using 95% confidence intervals (95% CI).

Main Results:

Foundry workers had a lifelong risk of dying from pneumoconioses averaging 2% (SMR = 7,368).
Excess mortality was observed for chronic bronchitis and emphysema (SMR = 132).
Non-significant increases in mortality were noted for buccal, stomach, colon, and urothelial cancers.

Conclusions:

Danish foundry workers exposed before 1970 experienced an elevated risk of severe, occupationally-related lung diseases.
The findings highlight the severe health consequences of historical occupational exposures in foundries.
This study serves as a crucial baseline for assessing the effectiveness of subsequent occupational health interventions.

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