Introduction Some of the evidence linking radon-related dose to lung cancer comes from epidemiologic research. Things get a little tricky when the disease, like lung cancer, has more than one suspected cause.
Smoking is recognized as the most prevalent cause for lung cancer.
Thus, radon studies have to carefully include the effects of the smoking behavior of the different groups that they study. The best study style for a disease that has multiple causes is called a case-control study. The best analysis of the miner data is summarized in a National Academy Report, BEIR VI . The most comprehensive case-control study of residential radon exposure in North America took place in Iowa. The study results have been published.