井下矿工流行病学调查与动物实验研究均证实高浓度镭氡剂量能增加肺癌发病的危险度。但长期居住在镭氡低浓度剂量水平的居室内是否增加肺癌的发病率尚无明确结论。为了探讨这一问题,作者进行群体病例对照研究。该研究把不吸烟妇女作为研究对象以减少吸烟及职业混杂因素的影响,从而更好地反映镭氡剂量与肺癌的关系。病例组为1986～1992年间确诊为肺癌的528名不吸 Epidemiological surveys and animal studies of underground miners have confirmed that high concentrations of radium thorium can increase the risk of lung cancer. However, there is no definite conclusion as to whether the long-term living in low-dose levels of radium radon indoors will increase the incidence of lung cancer. To explore this issue, the authors conducted a population-based case-control study. The study used non-smoking women as research subjects to reduce the influence of smoking and occupational confounding factors to better reflect the relationship between radium thorium dose and lung cancer. In the case group, 528 patients with lung cancer diagnosed between 1986 and 1992 did not smoke