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关于接触氡衰变产物的铀矿工人罹患肺癌的危险因素的许多问题尚未清楚。作者对加拿大安大略省北部伊利安湖和Bancroft二地区铀矿中接触时间较短、积累辐射水平较低的铀矿工人所发生的肺癌进行了纵向流行病学调查。根据该省工人补偿委员会(WCBO)的记录,工人中具有铀矿产物暴露史并被诊断为肺癌和可疑肺癌的人共154名,其中19名因无实际井下暴露或缺乏原发性肺癌诊断依据而摒除。余下的135名具有组织学记录或确实的临床依据,或由死亡诊断书证实。从名册记载的历年铀矿工人中,随机抽取1％样本(134名)代表处于危险状态的人群(暴露人群)。由于1％样本太小而未能求算SMR。
Many questions about the risk factors for lung cancer among uranium miners exposed to radon decay products are not yet clear. The authors conducted a longitudinal epidemiological investigation of lung cancer in uranium miners exposed to a relatively low level of exposure to relatively short duration of exposure to uranium deposits in the Lake Erian and Bancroft II areas in northern Ontario, Canada. According to WCBO records, 154 workers were exposed to uranium minerals and diagnosed as lung cancer and suspicious lung cancer, of whom 19 were based on a lack of physical downhole exposure or a lack of primary lung cancer diagnosis Exclude. The remaining 135 have a histological record or a solid clinical evidence, or confirmed by a death certificate. Of the uranium miners of the calendar year recorded in the roster, 1% of the random samples (134) were selected to represent the population at risk (exposed population). SMR can not be calculated due to 1% sample size too small.