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Radon associated lung cancer risk among French uranium miners: modifying factors of the exposure-risk relationship

Radon associated lung cancer risk among French uranium miners: modifying factors of the exposure-risk relationship

Vacquier B, Rogel A, Leuraud K, Caer S, Acker A, Laurier D.

Radiation and Environmental Biophysics. 2009, 48 (1):1-9.

Document type > *Article de revue

Keywords >

Research Unit > IRSN/DRPH/SRBE/LEPID

Authors > VACQUIER Blandine, ROGEL Agnès, LEURAUD Klervi, CAER Sylvaine, ACKER Alain, LAURIER Dominique

Publication Date > 24/10/2008

Summary

Radon is classified as a known pulmonary carcinogen in humans. A better understanding of the effects of low exposure and time-dependent factors, modifying the lung cancer risk is of continued interest. We present analyses of the exposure-risk relationship in the French cohort of uranium miners updated until 1999 and including five additional years of follow-up. These new analyses provide a better opportunity to look at low radon exposures with longer follow-up intervals, and allow consideration of new modifying factors, such as physical activity, mine location and job type. The cohort includes 5,086 miners, and 159 lung cancer deaths have been observed among these over a follow-up of more than 30 years. The exposure-risk relationship was estimated using excess relative risk models, which allow investigation of several modifying factors such as period of exposure, time since exposure, age at exposure, duration of exposure, exposure rate, job type, mine type and physical activity. The analysis confirms the association between radon exposure and lung cancer risk (ERR per 100 WLM = 0.58, P < 0.01). Period of exposure and physical activity appear as major modifying factors. Higher risks are observed for hard physical activity works. The effect of hard physical activity persists when the period of exposure is taken into account (ERR per 100 WLM = 2.95, P < 0.01).
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