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Occup Environ Med 2000;57:316-324 ( May )

Occupational exposures and pancreatic cancer: a meta-analysis

I Anneli Ojajärvia, Timo J Partanena, Anders Ahlbomb, Paolo Boffettad, Timo Hakulinenf, Nadia Jourenkovag, Timo P Kauppinena, Manolis Kogevinash, Miquel Portah, Harri U Vainioe, Elisabete Weiderpassc, Catharina H Wesselingb i

a Department of Epidemiology and Biostatistics, Finnish Institute of Occupational Health, Topeliuksenk 41A, 00250 Helsinki, Finland, b Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden, c Institute of Medical Epidemiology, Karolinska Institutet, Stockholm, Sweden, d Unit of Environmental Cancer Epidemiology, International Agency for Research on Cancer, Lyon, France, e Unit of Chemoprevention, International Agency for Research on Cancer, Lyon, France, f Finnish Cancer Registry, Helsinki, Finland, g Institut National de la Santé et de la Reserche Médicale, Villejuif, France, h Institut Municipal d'Investigacio Medica, Barcelona, Spain, i Universidad Nacional, Heredia, Costa Rica

Correspondence to: Dr Anneli Ojajärvi aoja{at}occuphealth.fi

Accepted 30 December 1999

OBJECTIVES---Consolidation of epidemiological data on pancreatic cancer and worksite exposures.
METHODS---Publications during 1969-98 were surveyed. Studies without verified exposures were excluded. Meta-analyses were conducted on data from 92 studies covering 161 populations, with results for 23 agents or groups of agents. With a standard format, five epidemiologists extracted risk estimates and variables of the structure and quality of each study. The extracted data were centrally checked. Random meta-models were applied.
RESULTS---Based on 20 populations, exposure to chlorinated hydrocarbon (CHC) solvents and related compounds was associated with a meta-risk ratio (MRR) of 1.4 (95% confidence interval (95% CI) 1.0 to 1.8). Nickel and nickel compounds were considered in four populations (1.9; 1.2 to 3.2). Excesses were found also for chromium and chromium compounds (1.4; 0.9 to 2.3), polycyclic aromatic hydrocarbons (PAHs) (1.5; 0.9 to 2.5), organochlorine insecticides (1.5; 0.6 to 3.7), silica dust (1.4; 0.9 to 2.0), and aliphatic and alicyclic hydrocarbon solvents (1.3; 0.8 to 2.8). Evidence on pancreatic carcinogenicity was weak or non-positive for the following agents: acrylonitrile (1.1; 0.0 to 6.2); arsenic (1.0; 0.6 to 1.5); asbestos (1.1; 0.9 to 1.5); diesel engine exhaust (1.0; 0.9 to 1.3); electromagnetic fields (1.1; 0.8 to 1.4); formaldehyde (0.8; 0.5 to 1.0); flour dust (1.1; 0.3 to 3.2); cadmium and cadmium compounds (0.7; 0.4 to 1.4); gasoline (1.0; 0.8 to 1.2); herbicides (1.0; 0.8 to 1.3); iron and iron compounds (1.3; 0.7 to 2.5); lead and lead compounds (1.1; 0.8 to 1.5); man-made vitreous fibres (1.0; 0.6 to 1.6); oil mist (0.9; 0.8 to 1.0); and wood dust (1.1; 0.9 to 2.5). The occupational aetiological fraction of pancreatic cancer was estimated at 12%. In a subpopulation exposed to CHC solvents and related compounds, it was 29%; to chromium and chromium compounds, 23%; to nickel and nickel compounds, 47%; to insecticides, 33%; and to PAHs, 33%.
CONCLUSION---Occupational exposures may increase risk of pancreatic cancer. High quality studies are called for on interactions between occupational, environmental, and lifestyle factors as well as interactions between genes and the environment.


Keywords: pancreatic cancer; occupational exposure; meta-analysis

© 2000 by Occupational and Environmental Medicine


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eLetters:

Read all eLetters

Excess pancreatic cancer risk and exposure to nickel and nickel compounds
Steven K Seilkop
Occup Environ Med Online, 20 Oct 2000 [Full text]
Author's reply to occupational exposures and pancreatic cancer: a meta-analysis
Anneli Ojajarvi, et al.
Occup Environ Med Online, 3 Nov 2000 [Full text]

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