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Occupation, exposure to polycyclic aromatic hydrocarbons and laryngeal cancer risk

✍ Scribed by Heiko Becher; Heribert Ramroth; Wolfgang Ahrens; Angela Risch; Peter Schmezer; Andreas Dietz

Publisher
John Wiley and Sons
Year
2005
Tongue
French
Weight
113 KB
Volume
116
Category
Article
ISSN
0020-7136

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✦ Synopsis

Abstract

Primary risk factors for laryngeal cancer are smoking and alcohol. The relevance of occupational exposures in the etiology of laryngeal cancer is not yet clarified. Some studies have suggested various occupational agents as additional causal risk factors. A population‐based case–control study 1:3 frequency matched by age and gender on laryngeal cancer was carried out in southwest Germany with 257 cases (236 males and 21 females between the ages of 37–80, histologically confirmed and diagnosed between January 5, 1998 and December 31, 2000) and 769 population controls (702 males, 67 females). Occupational exposures and other risk factors were obtained with face‐to‐face interviews using a detailed standardized questionnaire. The complete individual work history was assessed. A detailed assessment of work conditions was obtained by job‐specific questionnaires for selected jobs known to be associated with exposure to potential carcinogens. A specific substance list was used as second method for exposure assessment. Blood samples were taken from all individuals for genotype analysis. A strong effect of polycyclic aromatic hydrocarbons exposure on laryngeal cancer risk after adjustment for smoking and alcohol (odds ratio [OR] = 5.2, 95% confidence interval [CI] = 1.6–17.1) was observed for concordant exposure classified with both methods, and a clear dose‐response (p < 0.01 for linear trend) for exposure duration. Our findings are supported by risks associated with occupational groups in which this exposure is a priori considered likely. A differential effect by glutathione‐S‐transferases‐M1 genotype was found, however, small numbers do not allow firm conclusions on effect modification. Our study contributes to classifying polycyclic aromatic hydrocarbons as a risk factor for laryngeal cancer. © 2005 Wiley‐Liss, Inc.

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