National Institute for Occupational Safety and Health, Cincinnati, Ohio.
Am J Ind Med. 2018 Jul;61(7):566-571. doi: 10.1002/ajim.22853. Epub 2018 Apr 11.
There is sparse and inconsistent evidence of an association between styrene exposure and cancer.
This study examines mortality patterns in a previously studied cohort of 5201 workers employed in two Washington boat-building facilities, extending follow-up 5 years. Standardized mortality ratios (SMR) were calculated using state rates as referent. Cox regression calculated rate ratios (RR) per year employed in styrene-exposed exposed jobs.
No excess deaths from lymphohematopoietic cancers (LHCs) were observed (SMR: 0.99, 95%CI: 0.74-1.30) when compared to the referent population; however, the relative risk increased with duration of employment in internal analyses. Conversely, lung cancer mortality was significantly elevated (SMR: 1.24, 95%CI: 1.08-1.41), but there was no evidence of a dose-response relationship.
We found evidence that occupational exposure to styrene was associated with increased LHC risk, while no such association was observed for lung cancer.
关于苯乙烯暴露与癌症之间的关联,目前仅有少量且不一致的证据。
本研究对先前研究的 5201 名在华盛顿两家造船厂工作的工人队列的死亡模式进行了研究,随访时间延长了 5 年。使用州级死亡率作为参照计算标准化死亡率比 (SMR)。Cox 回归计算了暴露于苯乙烯的工作岗位上每年的超额死亡率比 (RR)。
与参照人群相比,未观察到淋巴造血系统癌症 (LHC)的超额死亡 (SMR:0.99,95%CI:0.74-1.30);然而,在内部分析中,相对风险随就业时间的延长而增加。相反,肺癌死亡率显著升高 (SMR:1.24,95%CI:1.08-1.41),但没有证据表明存在剂量反应关系。
我们发现职业暴露于苯乙烯与 LHC 风险增加有关,而肺癌则没有这种关联。