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PLoS Med :空气污染会使儿童认知发育功能降低

来源:生物谷 2015-03-04 18:18

2015年3月4日 讯 /生物谷BIOON/ --据发表在本周的PLOS Medicine杂志上的一篇文章报道称,在巴塞罗那,7-10岁在校儿童恐会因暴露在由于交通因素引起的空气高度污染中而导致认知能力降低。

研究者测量了39所学校的2715名小学生的三种认知功能(工作记忆、优秀的工作记忆和注意力),12个月内每3个月测量一次。在社会经济条件等外环境类似的情况下,将暴露到空气高污染中的小学生与暴露到空气低污染中的小学生的这些认知功能的发育情况进行比较,研究结果显示,即使在调整了其它影响认知功能的外在因素后,他们发现,在空气污染严重的学校上学的儿童的认知发育时间要长于污染较低的学校的儿童。例如,低污染区的11.5%小学生在12个月内可提高其认知功能,但是在高污染区域的小学生仅有7.4%在12个月内会提高其认知功能。所以直接测量学校中交通污染物的结果是可信的。

该结果也表示中学生正在发育的大脑易受交通因素引起的空气高度污染影响,这个结果已经影响到了新学校的选址以及空气污染管理办法的拟定,研究人员只控制了社会经济因素,而这个研究结果的精准度可能因混杂因素被限制,也就是说在交通污染程度高的学校的学生中,影响他们认知功能的因素可能还有其它未知的原因。(生物谷Bioon.com)

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Air pollution linked to slower cognitive development in children

Sunyer J, Esnaola M, Alvarez-Pedrerol M, Forns J, Rivas I, López-Vicente M, et al.

The researchers measured three cognitive outcomes (working memory, superior working memory, and attentiveness) every 3 months over a 12-month period in 2715 primary school children attending 39 schools. By comparing the development of these cognitive outcomes in the children attending schools where exposure to air pollution was high to those children attending a school with a similar socio-economic index where exposure to pollution was low, they found that the increase in cognitive development over time among children attending highly polluted schools was less than among children attending paired lowly polluted schools, even after adjusting for additional factors that affect cognitive development. Thus, for example, there was an 11.5% 12-month increase in working memory at the lowly polluted schools but only a 7.4% 12-month increase in working memory at the highly polluted schools. These results were confirmed using direct measurements of traffic related pollutants at schools.

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