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风险无处不在 夜间室外光关联女性乳腺癌!

2017-08-19 06:46:24   新华网

美国哈佛大学陈曾熙公共卫生学院的一项研究显示,生活在夜间室外光较强环境里的女性,罹患乳腺癌的风险较高。这一关联在经常上夜班的女性身上显得更突出。

研究人员在17日出版的美国《环境状况观察》月刊网络版发表报告说,他们分析了1989年至2013年“护士健康研究Ⅱ”中近11万女性的数据,对应夜间光环境的卫星图片,并综合考虑夜班等相关健康和社会经济因素,发现按照居住地夜间室外光由强至弱排序,住在排名前五分之一地区的调查对象罹患乳腺癌的风险比垫底的五分之一高14%,夜间室外光越强,得乳腺癌风险越高。

美国科学促进会主办的EurekAlert网站援引研究人员的话报道,这一关联只限于绝经前女性,以及目前吸烟或有过吸烟史的女性。此外,上夜班女性中,这一关联尤其明显。这意味着,曝露在夜间光照和夜班共同影响乳腺癌风险,而其作用机制可能是扰乱昼夜节律。(黄敏)【新华社微特稿】

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