OBJECTIVES: Exposure to iron fumes and dust and welding fumes is widespread and may increase the risk of lung cancer. The aim of this study was to identify associations between exposure to iron and welding fumes and the incidence of lung cancer among Finnish men. METHODS: The cohort of all economically active Finnish men, born in 1906-1945, who participated in the national census in 1970 was followed through the Finnish Cancer Registry for lung cancer cases (N=30,137) during 1971-1995. Their census occupations in 1970 were converted to estimates of cumulative exposure to iron and welding fumes with the Finnish job-exposure matrix on the basis of likelihood, average level, and estimated duration of exposure. Relative risk estimates for categorized cumulative exposure were defined by a Poisson regression, adjusted for smoking, socioeconomic status, and exposure to asbestos and silica dust. RESULTS: The relative risks for lung cancer increased as the cumulative exposure to iron and welding fumes increased. Relative risks in the highest exposure category was 1.35 [95% confidence interval (95% CI) 1.05-1.73] for iron and 1.15 (95% CI 0.90-1.46) for welding fumes. The respective relative risks estimated for squamous-cell carcinoma of the lungs were 1.94 (95% CI 1.35-2.78) and 1.55 (95% CI 1.08-2.24). There was no excess risk of small-cell carcinoma in any exposure category. CONCLUSIONS: Occupational exposure to iron and welding fumes was associated with an increase in lung cancer risk, mainly that of squamous-cell carcinoma. The simultaneous exposure to both of these agents and other potential work-related carcinogens complicates the interpretation of the independent roles of the risk factors.
OBJECTIVES: Exposure to iron fumes and dust and welding fumes is widespread and may increase the risk of lung cancer. The aim of this study was to identify associations between exposure to iron and welding fumes and the incidence of lung cancer among Finnish men. METHODS: The cohort of all economically active Finnish men, born in 1906-1945, who participated in the national census in 1970 was followed through the Finnish Cancer Registry for lung cancer cases (N=30,137) during 1971-1995. Their census occupations in 1970 were converted to estimates of cumulative exposure to iron and welding fumes with the Finnish job-exposure matrix on the basis of likelihood, average level, and estimated duration of exposure. Relative risk estimates for categorized cumulative exposure were defined by a Poisson regression, adjusted for smoking, socioeconomic status, and exposure to asbestos and silica dust. RESULTS: The relative risks for lung cancer increased as the cumulative exposure to iron and welding fumes increased. Relative risks in the highest exposure category was 1.35 [95% confidence interval (95% CI) 1.05-1.73] for iron and 1.15 (95% CI 0.90-1.46) for welding fumes. The respective relative risks estimated for squamous-cell carcinoma of the lungs were 1.94 (95% CI 1.35-2.78) and 1.55 (95% CI 1.08-2.24). There was no excess risk of small-cell carcinoma in any exposure category. CONCLUSIONS: Occupational exposure to iron and welding fumes was associated with an increase in lung cancer risk, mainly that of squamous-cell carcinoma. The simultaneous exposure to both of these agents and other potential work-related carcinogens complicates the interpretation of the independent roles of the risk factors.
Authors: Benjamin Kendzia; Thomas Behrens; Karl-Heinz Jöckel; Jack Siemiatycki; Hans Kromhout; Roel Vermeulen; Susan Peters; Rainer Van Gelder; Ann Olsson; Irene Brüske; H-Erich Wichmann; Isabelle Stücker; Florence Guida; Adonina Tardón; Franco Merletti; Dario Mirabelli; Lorenzo Richiardi; Hermann Pohlabeln; Wolfgang Ahrens; Maria Teresa Landi; Neil Caporaso; Dario Consonni; David Zaridze; Neonila Szeszenia-Dabrowska; Jolanta Lissowska; Per Gustavsson; Michael Marcus; Eleonora Fabianova; Andrea 't Mannetje; Neil Pearce; Lap Ah Tse; Ignatius Tak-Sun Yu; Peter Rudnai; Vladimir Bencko; Vladimir Janout; Dana Mates; Lenka Foretova; Francesco Forastiere; John McLaughlin; Paul Demers; Bas Bueno-de-Mesquita; Paolo Boffetta; Joachim Schüz; Kurt Straif; Beate Pesch; Thomas Brüning Journal: Am J Epidemiol Date: 2013-09-19 Impact factor: 4.897
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Authors: Elizabeth M Ward; Paul A Schulte; Kurt Straif; Nancy B Hopf; Jane C Caldwell; Tania Carreón; David M DeMarini; Bruce A Fowler; Bernard D Goldstein; Kari Hemminki; Cynthia J Hines; Kirsti Husgafvel Pursiainen; Eileen Kuempel; Joellen Lewtas; Ruth M Lunn; Elsebeth Lynge; Damien M McElvenny; Hartwig Muhle; Tamie Nakajima; Larry W Robertson; Nathaniel Rothman; Avima M Ruder; Mary K Schubauer-Berigan; Jack Siemiatycki; Debra Silverman; Martyn T Smith; Tom Sorahan; Kyle Steenland; Richard G Stevens; Paolo Vineis; Shelia Hoar Zahm; Lauren Zeise; Vincent J Cogliano Journal: Environ Health Perspect Date: 2010-06-18 Impact factor: 9.031
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