Mortality Among Hardmetal Production Workers: German Historical Cohort Study.

Area of Science:

• Occupational Health
• Industrial Hygiene
• Toxicology

Background:

• Hardmetal industry workers face potential exposure to cobalt and tungsten.
• Previous studies suggest a link between hardmetal exposure and respiratory diseases, including lung cancer.

Purpose of the Study:

• To investigate the relationship between cobalt and tungsten exposure and mortality risks in German hardmetal workers.
• To assess total and cause-specific mortality, including lung cancer, in relation to occupational exposures.

Main Methods:

• A cohort of blue-collar workers from three German hardmetal processing plants was studied.
• Individual cumulative exposures and long-term average concentrations of cobalt, nickel, tungsten, and dust were estimated.
• Standardized mortality ratios (SMRs) and time-dependent multivariable Cox models were used for analysis.

Main Results:

• Elevated SMRs were observed for all-cause, heart disease, and nonmalignant respiratory disease mortality.
• No increased risks for any endpoints were found in internal analyses.
• No clear exposure-response relationship was indicated for the studied endpoints.

Conclusions:

• The study did not find evidence supporting elevated lung cancer risks in this cohort.
• Methodological limitations, particularly incomplete death cause ascertainment, hinder definitive conclusions regarding exposure effects.