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本文根据剂量-反应关系,对有系列X线胸片的379例轻稀土粉尘作业工人进行了累积接尘量计算,并用寿命表方法分析了接尘量与胸片O~+累计发生率的关系。结果表明,按工人工作30年计,O~+发生率在1%时,稀土粉尘浓度为3.3mg/m~3(几何均值),或4.3mg/m~3(算术均值)。
According to the dose-response relationship, 379 light rare earth dust workers with series of X-ray chest were used to calculate the accumulated dust collection amount. The relationship between the amount of dust collection and the cumulative incidence of O + + chest radiographs was analyzed by life table method . The results show that the concentration of rare earth dust is 3.3mg / m ~ 3 (geometric mean) or 4.3mg / m ~ 3 (arithmetic mean) when the O ~ + incidence rate is 1% according to the work of workers for 30 years.