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对地下矿工的研究发现,接触放射性氡及其衰变产物可增加患肺癌的危险性。因此,当发现氡在室内蓄积时,接触这种已知致癌物影响公众健康的问题受到人们关注。根据对矿工的研究结果,估计在美国室内的氡是每年6000～36000例肺癌患者致死的原因。由于在矿井工作和在室内居住的差异,这种估计具有很大的不肯定性。曾进行过多次的对照组病例研究,以便直接评估室内氡对肺癌的危险性,有些研究报告为阳性结果或弱阳性,而另一些报告则相反。为了对室内氡导致肺癌危险性提供更多的资料,作者进行了全部对照
Research on underground miners found that exposure to radioactive cesium and decay products can increase the risk of lung cancer. Therefore, when it was discovered that earthworms were accumulating indoors, the problem of exposure to this known carcinogen affecting public health was of concern. According to the results of the miner’s research, it is estimated that the indoor sickness in the United States is the cause of death from 6000 to 36,000 cases of lung cancer each year. Due to the differences in working in the mine and living indoors, this estimate is highly uncertain. A number of control group case studies have been conducted to directly assess the risk of indoor sputum lung cancer. Some studies reported positive results or weak positives, while others reported the opposite. In order to provide more information on the risk of indoor lung cancer causing lung cancer, the authors conducted all the controls.