The aim of this project is first to develop a radon exposure model and to predict radon exposure at home for children in Switzerland. Second, we want to investigate whether indoor radon concentration increases the risk of childhood cancer in general and acute leukemia (ALL) in particular. And third we investigated the association between childhood cancer and non-ionising radiation from broadcast transmitters in Switzerland. A census based cohort study was established to investigate this question. In total, we included 997 children aged between 0 and 15 years and residents in Switzerland, born between the 4th of December 2000 (date of census) and 31 December, 2007.
Average radon levels were 85.7 Bq/m3 and no indications for an association with total childhood cancer, childhood leukemia or central nervous system tumour was observed. Mean exposure to non-ionising radiation from broadcast transmitters was 0.14 V/m. Again childhood cancer was not related to this exposure source.