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Rôle de l’exposition professionnelle aux laines minérales dans les cancer broncho-pulmonaires : analyse de l’étude cas-témoins icare

Abstract : Occupational exposures are the second main risk factor of lung cancer. Asbestos has progressively been substituted by mineral wools (MW). Because of their similarity in shape with asbestos, they have been suspected of causing cancer of the respiratory system. In this context, the objectives of this work were to assess the role of occupational history in lung cancer risk; to investigate in details lung cancer risk associated with exposure to MW, carefully taking into account occupational exposures to asbestos and crystalline silica, two common potential carcinogenic exposure among construction workers; and to study the risk of lung cancer associated with occupational exposure to cement dusts.We analysed lifetime occupational history of cases and controls included in the ICARE study, a large multi-centre, population-based, case-control study. They were recruited in 10 French départements with a general cancer registry. The study included 6481 subjects (men: 2 276 lung cancer cases and 2 780 controls, women: 650 lung cancer cases and 775 controls). Two strategies of assessment of occupational exposure to MW and asbestos were used: a job-exposure matrix (JEM) and a task-exposure matrix constructed by trained hygienist and taking into account individual information. Occupational exposures to crystalline silica and cement dusts were both assessed using specific JEMs.Our results confirm the important role of occupational exposure as a determinant of lung cancer risk by showing associations between lung cancer risk and several occupations or industries. An association between MW exposure and lung cancer risk is suggested without being able to exclude a potential residual confounding by asbestos since these two exposures are deeply correlated. Our results also confirm asbestos and silica carcinogenicity and suggest an association between cement dusts and lung cancer risk.
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Florence Guida. Rôle de l’exposition professionnelle aux laines minérales dans les cancer broncho-pulmonaires : analyse de l’étude cas-témoins icare. Santé publique et épidémiologie. Université Paris Sud - Paris XI, 2012. Français. ⟨NNT : 2012PA11T096⟩. ⟨tel-00785982⟩

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