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Exposition professionnelle aux solvants et risque de cancer des voies aéro-digestives supérieures

Abstract : Background : The role of occupational exposure to solvents in the risk of head and neck cancer has been suggested in some studies but has been few investigated, despite their widespread use in the workplace. Objective: The objective of this thesis was to examine the associations between occupational exposure to solvents and the risk of head and neck cancer. Methods: This work is based on data from the ICARE study, a large population-based case-control study conducted in France between 2001 and 2007. The analysis was restricted to men and included 1,857 cases of squamous cell carcinoma of the oral cavity, pharynx and larynx and 2,780 controls. Detailed occupational lifetime as well as alcohol and tobacco consumptions were collected by questionnaires. Exposure to solvents was assessed by job exposure matrices and included five chlorinated solvents (perchloroethylene, trichloroethylene, methylene chloride, chloroform, carbon tetrachloride), five petroleum-based solvents (benzene; gasoline; diesel, fuels and kerosene; special petroleum products; white spirits) and five oxygenated solvents (ketones and esters; alcohols; diethyl ether; ethylene glycol; tetrahydrofuran). Odds-ratios adjusted for smoking, alcohol drinking and other potential confounders and 95% confidence intervals were estimated with logistic models. Results: No significant association was found between occupational exposure to chlorinated, petroleum-based and oxygenated solvents and the risk of head and neck cancer overall. In subsite analysis, the risk of laryngeal cancer increased with cumulative exposure to perchloroethylene. Non-significantly elevated risks of hypopharyngeal cancer were found in men exposed to high cumulative levels of methylene chloride, white spirits and tetrahydrofuran. An association between exposure to tetrahydrofuran and oral cavity cancer was also suggested. No other clear association was found for the other solvents under study, for any cancer site. Conclusion: Although positive associations were observed for several solvents, overall the results do not suggest a substantial role of exposure to solvents in head and neck cancer risk.
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Submitted on : Friday, January 26, 2018 - 3:12:07 PM
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Christine Barul. Exposition professionnelle aux solvants et risque de cancer des voies aéro-digestives supérieures. Cancer. Université Paris-Saclay, 2017. Français. ⟨NNT : 2017SACLS588⟩. ⟨tel-01693782⟩



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