Lancet Respir Med:少量吸烟同样有害!研究称:每天5支肺损伤长达数十年

2019-10-22 xujing 中国循环杂志

许多人认为每天抽几支烟并没有那么糟糕,但事实并非如此。

许多人认为每天抽几支烟并没有那么糟糕,但事实并非如此。

哥伦比亚大学的研究显示,即使每天吸烟少于5支,也会对肺部造成长期损害。

而且,一天抽5支烟的人与一天抽两包烟的人在肺功能丧失方面的差异相对较小。戒烟后,肺损伤还会持续数十年。

研究分析发现,轻度吸烟者(少于5支)的肺功能下降的速度比不吸烟者要快得多。

与从不吸烟者的下降率(设为0)相比,轻度吸烟者(少于5支)的额外下降率为7.65 ml/年,重度吸烟者(≥30支)为11.24 ml/年。

这意味着一个轻度吸烟者在一年内可能失去的肺功能和一个重度烟者在九个月内可能失去的肺功能差不多。

每天抽几支烟比人们想象的要危险得多。

而且,戒烟后,肺不能完全恢复。吸烟者戒烟后,肺部的解剖结构异常会持续数十年。

肺功能会随年龄自然下降(从20多岁开始),但吸烟会加速肺功能的下降,研究人员专门研究了正在吸烟者、以前吸烟者和从不吸烟者的肺功能。

研究表明,虽然以前吸烟者的肺活量下降率(与不吸烟者相比多1.57 ml/年)远低于现在吸烟者(与不吸烟者相比多多9.4 2ml/年),但至少30年内,这一下降率没有达到正常。

研究纳入25 352人(17~93岁),共完成了70 228项有效的肺活量检查。随访7(3,20)年。

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    2020-02-10 howi
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    2019-10-23 12546fb1m09暂无昵称

    厉害了

    0

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    2019-10-23 tastas
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    2019-10-23 thm112988

    0

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