Doll R, Mathews J D, Morgan L G
Br J Ind Med. 1977 May;34(2):102-5. doi: 10.1136/oem.34.2.102.
Nine hundred and sixty-seven men who were employed in a nickel refinery in South Wales on at least two occasions five or more years apart before 1945 have been followed up, and the mortality rates from different causes related to the date of their first employment. Previous reports suggested that the occupational risks of lung and nasal sinus cancer had been eliminated by 1925. It is now shown that the risk persisted until 1930, which accords better with the temporal changes in the process.
对967名男性进行了随访,这些男性于1945年之前至少两次受雇于南威尔士的一家镍精炼厂,每次工作间隔五年或更长时间,并且将不同病因的死亡率与他们首次就业的日期相关联。先前的报告表明,到1925年时,肺癌和鼻窦癌的职业风险已消除。现在显示,这种风险一直持续到1930年,这与该过程中的时间变化更相符。