被动吸烟增加患乳腺癌危险
文章来源:未知 文章作者:enread 发布时间:2011-03-04 06:34 字体: [ ]  进入论坛
(单词翻译:双击或拖选)

Exposure to second-hand1 tobacco smoke as a child or adult appears to increase a woman's risk of breast cancer, experts say.

专家表示,暴露于二手烟环境中的儿童或成人患乳腺癌的风险加大。

Their study of nearly 80,000 women found breast cancer risk was a third higher among those who had clocked up(达到,记录) decades of passive smoking.

The researchers say their "suggestive" findings in the British Medical Journal need confirming with more studies.

Meanwhile, health experts emphasised the importance of smoking cessation(停止,中断) .

Controversy2

The relationship between passive smoking and breast cancer is a contentious3 issue.

While some studies have found a link, others have not. And none appear to agree on how much exposure is too much or at what age it could be most damaging.

The latest study by US researchers, led by Dr Juhua Luo from West Virginia University, does not provide a definitive4 answer but does suggest that extensive exposure to second-hand smoke poses a risk.

Among the 79,990 women aged5 between 50 and 79 studied, the researchers identified 3,250 cases of invasive breast cancer during 10 years of follow-up.

When the women were asked about their history of smoking and exposure to tobacco smoke a pattern emerged.

Smokers6 had a 16% increased risk of developing breast cancer after the menopause(更年期) .

For ex-smokers the risk was 9% and continued for up to 20 years after an individual had stopped smoking.

The highest breast cancer risk was found among women who had smoked for over 50 years or more.

But women who had never smoked but had lived or worked with smokers for prolonged(延长的) times also appeared to be at increased risk for breast cancer.

For example, over 10 years' exposure in childhood, over 20 years' exposure as an adult at home and over 10 years' exposure as an adult at work, increased the risk by 32%.

The same was not seen among women who had been exposed to lesser7 amounts.

Dr Rachel Greig of Breakthrough Breast Cancer said: "The study suggests the earlier you start smoking and the longer you continue to do so, the higher your chance of developing breast cancer.

"We know that smoking has many other health risks and is a major cause of lung cancer and heart disease, and we encourage all women not to smoke."

Amanda Sandford of Action on Smoking and Health said a zero tolerance8 was needed. "If we want to have a real impact on cancer deaths then we have to prevent children from starting to smoke and give smokers all the support they need to quit."



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1 second-hand second-hand     
adj.用过的,旧的,二手的
参考例句:
  • I got this book by chance at a second-hand bookshop.我赶巧在一家旧书店里买到这本书。
  • They will put all these second-hand goods up for sale.他们将把这些旧货全部公开出售。
2 controversy 6Z9y0     
n.争论,辩论,争吵
参考例句:
  • That is a fact beyond controversy.那是一个无可争论的事实。
  • We ran the risk of becoming the butt of every controversy.我们要冒使自己在所有的纷争中都成为众矢之的的风险。
3 contentious fa9yk     
adj.好辩的,善争吵的
参考例句:
  • She was really not of the contentious fighting sort.她委实不是好吵好闹的人。
  • Since then they have tended to steer clear of contentious issues.从那时起,他们总想方设法避开有争议的问题。
4 definitive YxSxF     
adj.确切的,权威性的;最后的,决定性的
参考例句:
  • This book is the definitive guide to world cuisine.这本书是世界美食的权威指南。
  • No one has come up with a definitive answer as to why this should be so.至于为什么该这样,还没有人给出明确的答复。
5 aged 6zWzdI     
adj.年老的,陈年的
参考例句:
  • He had put on weight and aged a little.他胖了,也老点了。
  • He is aged,but his memory is still good.他已年老,然而记忆力还好。
6 smokers d3e72c6ca3bac844ba5aa381bd66edba     
吸烟者( smoker的名词复数 )
参考例句:
  • Many smokers who are chemically addicted to nicotine cannot cut down easily. 许多有尼古丁瘾的抽烟人不容易把烟戒掉。
  • Chain smokers don't care about the dangers of smoking. 烟鬼似乎不在乎吸烟带来的种种危害。
7 lesser UpxzJL     
adj.次要的,较小的;adv.较小地,较少地
参考例句:
  • Kept some of the lesser players out.不让那些次要的球员参加联赛。
  • She has also been affected,but to a lesser degree.她也受到波及,但程度较轻。
8 tolerance Lnswz     
n.宽容;容忍,忍受;耐药力;公差
参考例句:
  • Tolerance is one of his strengths.宽容是他的一个优点。
  • Human beings have limited tolerance of noise.人类对噪音的忍耐力有限。
TAG标签: smoke tobacco cancer
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