Exposure to high concentrations of radon (222Rn) progeny produces lung cancer in both undergroundminers and experimentally exposed laboratory animals. The goal of the study was to determinewhether or not residential radon exposure exhibits a statistically significant association with lungcancer in a state with high residential radon concentrations.A population-based, case-control epidemiologic study was conducted examining the relationshipbetween residential radon gas exposure and lung cancer in Iowa females who occupied their currenthome for at least 20 years.
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