您現(xiàn)在的位置: > Language Tips > Audio & Video > Special Speed News  
 





 
Fewer US women getting mammograms
[ 2007-05-16 10:01 ]

This is the VOA Special English Health Report.

Research is often a slow, maddening search for answers where each new finding only seems to raise more questions.

This is the case with a story we told you about last month. It offers a good example of how difficult it can be to define a relationship between two events, or even prove a connection.

In this case, one event was a sudden drop in the use of hormone replacement therapy. The other, which followed, was a sharp drop in the breast cancer rate in the United States.

Many older women stopped taking hormones after a government warning in 2002 about possible risks.

Last December a team of scientists reported that breast cancer rates fell in 2003. Then, last month, they reported that the breast cancer rate was still down in 2004. They suggested that the major cause was most likely the drop in hormone use.

For evidence the researchers presented two main findings. One was that the reduction in the breast cancer rate was greatest among cancers fed by estrogen. Estrogen is commonly used in hormone replacement therapy. The other finding was that the reduction happened mainly among older women -- the main users of the therapy.

The scientists suggested that going off hormone therapy reduced the risk of cancer growth. They said other explanations for the drop in the breast cancer rate were possible, but less likely to have played a big part.

Now, a new study looks at one of those other possible influences: a decrease in mammogram testing for breast cancers. The study by the American Cancer Society just appeared in the journal Breast Cancer.

First, the study shows that breast cancer rates began to fall in 1999. That was three years before the government warning about hormone therapy.

Secondly, the study shows that after the warning, fewer women had mammograms, which are usually done with X-rays. A mammogram is required before starting hormone therapy.

Whatever the reason for the decrease, fewer tests would mean fewer chances to find cancers. Still, many experts believe that the drop in estrogen-fed cancers in older women had something to do with the drop in hormone use.

A final note: government researchers reported Monday that mammogram testing fell four percent between 2000 and 2005. The lead researcher called it "very troubling."

And that's the VOA Special English Health Report, written by Caty Weaver. I'm Barbara Klein.


mammogram :乳腺X光照片

點(diǎn)擊進(jìn)入更多VOA慢速

(來源:VOA  英語點(diǎn)津姍姍編輯)

 
 
相關(guān)文章 Related Stories
 
         
 
 
 
 
 
         

 

 

 
 

48小時(shí)內(nèi)最熱門

     

本頻道最新推薦

     
  《平凡的奇跡》:Ordinary miracle
  Fewer US women getting mammograms
  Bush pushes plan to reduce auto emissions
  Hollywood's images of smoking encourage teens to light up
  Pres. Bush celebrates America's 400th anniversary in Jamestown

論壇熱貼

     
  英語點(diǎn)津開博客,大家覺得怎么樣?
  快快加入“凈臉兩周年特別活動(dòng)”
  Levinson對(duì)各年齡段生活的詮釋
  employment number 怎么翻
  大家一塊來說說體現(xiàn)漢語文化的英語詞匯
  這里為什么不用”reason“呢?






主站蜘蛛池模板: 国产女人18毛片水真多18精品 | 爱情岛永久入口网址首页| 国产日本在线视频| A级毛片无码免费真人| 无翼少无翼恶女漫画全彩app| 亚洲国产午夜电影在线入口| 窈窕淑女韩国在线看| 国产免费一区二区三区免费视频| 91亚洲精品视频| 开心久久婷婷综合中文字幕| 久久精品国产欧美日韩| 欧美精品一区二区三区久久 | 日韩欧美在线播放视频| 亚洲毛片无码专区亚洲乱| 紧缚调教波多野结衣在线观看| 国产无遮挡又黄又爽在线视频 | a级亚洲片精品久久久久久久| 日日橹狠狠爱欧美超碰| 亚洲三级中文字幕| 狠狠噜狠狠狠狠丁香五月| 四虎国产精品免费久久久| 黑色丝袜小舞被躁翻了3d| 国产麻豆成91| а√天堂中文资源| 日本一道高清一区二区三区| 亚洲区小说区激情区图片区 | 精品不卡一区二区| 国产乱来乱子视频| 激情五月婷婷网| 国产精品视频区| a级国产乱理伦片在线观看| 成人精品一区二区不卡视频| 久久精品久噜噜噜久久| 欧美孕妇与黑人巨交| 亚洲色欲久久久综合网东京热| 美女免费视频一区二区| 国产你懂的在线观看| 九九影院理论片在线观看一级 | 国内精品久久久久久久影视麻豆 | 中国jizzxxxx| 日本电影中文字幕|