Asbestos standards: Impact of currently uncounted chrysotile asbestos fibers on lifetime lung cancer risk.

Asbestos standards: Impact of currently uncounted chrysotile asbestos fibers on lifetime lung cancer risk.
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DOI:
10.1002/ajim.22836
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发表时间:
2018-05
影响因子:
3.5
通讯作者:
Dement J
Dement J
中科院分区:
医学4区
文献类型:
--
作者:
Richardson DB;Keil AP;Cole SR;Dement J

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现行法规要求收集石棉纤维并使用光学显微镜进行检查。这种方法无法计数那些太短或太细而无法在正常条件下使用光学显微镜可靠计数的纤维。一个队列的3054名工人受雇于石棉纺织厂,以确定死亡原因。接触的几乎全部是温石棉。使用光学显微镜和电子显微镜定量纤维计数。g公式被用来估计政策对肺癌的影响,这些政策是根据使用光学和电子显微镜量化的纤维计数来定义的。在当前标准下,估计的肺癌风险为7.33%,与使用电子显微镜计数的1纤维/ml标准下的预期风险(7.30%)相当。以电镜计数0.1纤维/ml为标准,估计肺癌的终生危险度为7.10%。我们确定的政策定义的电子显微镜为基础的石棉暴露指标,产生可比的,或更低,肺癌死亡率比预期的现行标准。
Current regulations require that asbestos fibers are collected and examined using a light microscope. This method fails to enumerate fibers that are too short or thin to reliably count using a light microscope under normal conditions. A cohort of 3054 workers employed at an asbestos textile plant was followed to ascertain causes of death. Exposure was almost entirely chrysotile. Fiber counts were quantified using light microscopy and electron microscopy. The g-formula was used to estimate impacts on lung cancer of policies defined in terms of fiber counts quantified using light and electron microscopy. Given exposure at the current standard, the estimated lung cancer risk was 7.33%, comparable to the risk expected under a standard of 1 fiber/ml counted using electron microscopy (7.30%). The lifetime risk of lung cancer under a standard of 0.1 fiber/ml counted by electron microscopy was estimated to be 7.10%. We identify policies defined in terms of electron microscopy-based asbestos exposure metrics that yield comparable, or lower, lung cancer mortality than that expected under the current standard.
DOI: 10.1002/ajim.4700040303
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DOI: 10.1097/ede.0000000000000160
发表时间: 2014-11
期刊: Epidemiology (Cambridge, Mass.)
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