Liver cancer among employees in Denmark

Area of Science:

• Occupational Health
• Hepatology
• Cancer Epidemiology

Background:

• Primary liver cancer (PLC) is a significant global health concern.
• The role of occupational chemical exposures, particularly organic solvents, in PLC etiology requires further investigation.

Purpose of the Study:

• To investigate the association between occupational exposure to chemical agents and the risk of primary liver cancer (PLC).
• To identify specific industries and chemical exposures linked to an increased risk of PLC.

Main Methods:

• A nested case-control study design was employed using data from the Danish Cancer Registry and the Central Population Register.
• Employment histories from a national pension fund were linked to identify occupational exposures for 973 PLC cases and 15,348 controls.
• Histological classifications included hepatocellular carcinoma, cholangiocarcinoma, and combined types.

Main Results:

• An elevated risk of PLC was observed in men and women across various industrial branches.
• Twenty-nine industrial branches showed an odds ratio (OR) for liver cancer exceeding 3.0.
• Women in bookprinting and offset printing industries had an OR greater than 10; male farmers had a reduced OR (0.41).
• Employees in the hospitality and alcohol production sectors exhibited increased ORs for both PLC and esophageal cancer.

Conclusions:

• Occupational exposure to specific chemical agents, notably organic solvents in certain industries, is associated with an increased risk of primary liver cancer.
• The findings highlight the need for targeted occupational health interventions in high-risk industries.