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高速公路附近痴呆发病率高
来源:中国科学报      作者:晋楠      时间:2017-01-09 20:29      关键词:高速公路,痴呆发病率高

 

别把污染物吸入体内。 图片来源:Dominic Lipinski/Getty

一项对加拿大600多万成年人的研究表明,生活在高速公路附近的人罹患痴呆症的几率更高,相关成果近日发表于《柳叶刀》。

跟踪这些受众11年后,研究人员发现痴呆症发病率和生活在主要道路附近存在明显关联。与生活在距离繁忙路段300多米的人相比,生活在交通要道50米以内的人发展痴呆症的风险高出7%。

对于生活在距离交通繁忙路段50~100米之间的人来说,这一风险比例降低到4%;对于生活在距离繁忙路段101~200米的人来说,这一风险降低到2%。如果距离交通要道更远,患病率与交通之间的关联便没有明显的证据。

“我们的发现表明你生活的地方距离每日交通繁忙路段越近,那么罹患痴呆症的风险就越高。”安大略省公共卫生局带领此项研究的Hong Chen说,“随着人们与交通道路接触的日益增多以及越来越多的人到城市生活,这项研究有着严肃的公共卫生意义。”

这项研究还发现,长期暴露在充满二氧化氮和细小颗粒物(污染空气中两种常见的组成物)的环境中也与痴呆症存在关联,不过这其中也可能涉及其他因素。也有研究将空气污染与痴呆症风险联系在一起。

然而,这项研究并未确定道路和空气污染本身是否会导致痴呆症。罪魁祸首也有可能是与这些因素相关连的事物。

“这项研究分析了主要道路和交通空气污染是导致痴呆症的潜在风险因素,但与吸烟、缺乏运动或是体重过重等其他风险相对照,在形成空气污染是与痴呆症相关的风险因素的结论之前,需要对该结论进行深入调查研究。”英国阿尔茨海默氏症研究慈善机构的David Reynolds说。(晋楠)


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