Occupation and bladder cancer in males: a case-control study.

Area of Science:

• Occupational epidemiology
• Environmental health
• Cancer research

Background:

• Turin, Italy, has a high concentration of car workers and related industries.
• Previous studies suggest occupational exposures are linked to bladder cancer.
• Understanding specific industry risks is crucial for public health interventions.

Purpose of the Study:

• To investigate the association between various occupations and bladder cancer risk.
• To identify specific high-risk industries and potential carcinogens.
• To estimate the population-attributable risk for bladder cancer from occupational exposures.

Main Methods:

• A case-control study involving 512 male bladder cancer cases and 596 male hospital controls.
• Analysis of occupational histories within the province of Turin.
• Development of a job-exposure matrix to explore new hypotheses and identify chemical exposures, specifically aromatic amines.

Main Results:

• Elevated relative risks (RR) were observed for dyestuff production (RR=8.8), leather industry (RR=3.8), and other rubber goods (RR=2.5).
• Turners with significant work history before 1940 also showed an increased risk (RR=3.1).
• Aromatic amines were the only chemical group consistently associated with bladder cancer.

Conclusions:

• Specific occupations, particularly in dyestuff and leather production, are significantly associated with increased bladder cancer risk.
• Aromatic amines are implicated as a primary occupational carcinogen for bladder cancer.
• Occupational exposures may account for an estimated 10% of bladder cancer cases in the studied population.