Pancreatic cancer among workers processing synthetic resins

Area of Science:

• Occupational Health
• Epidemiology
• Toxicology

Background:

• A prior cohort mortality study identified an excess of pancreatic cancer at a New Jersey plastics manufacturing facility.
• Workplace exposures were investigated as a potential cause for the observed cancer excess.

Purpose of the Study:

• To determine if specific workplace exposures at a plastics facility were associated with an increased risk of pancreatic cancer.
• To evaluate the relationship between duration and timing of exposure in a vinyl and polyethylene processing area and pancreatic cancer risk.

Main Methods:

• A nested case-control study design was employed.
• Pancreatic cancer cases (n=28) and controls (n=140) were matched by birth year and survival status.
• Plant work history records were used to compare department assignments, duration, and time since first assignment between cases and controls.

Main Results:

• Workers assigned to areas processing vinyl resins and polyethylene (PE) exhibited an elevated risk of pancreatic cancer.
• Men with over 16 years of assignment to this area had a significantly increased risk ratio of 7.15 (95% CI: 1.28-40.1).
• The excess risk was associated with long-term exposure (≥20 years) and latency periods averaging 32 years, with many cases starting in the 1940s.

Conclusions:

• The study suggests a link between long-term occupational exposure to vinyl resins and/or polyethylene processing and an increased risk of pancreatic cancer.
• Vinyl processing is considered the more probable contributor to the observed excess.
• Further research with detailed exposure data is needed to identify specific causative agents.