烟草在线据《健康日》报道编译　　一项新的研究发现，美国大约有五分之一的成年吸烟者使用过电子卷烟。

　　电子卷烟是由电池提供动力的输出尼古丁、香料和其他化学物质的装置。它们将这些物质转变成使用者吸入的蒸汽，也就是“vaping”。

　　2011年，美国大约有21%的成年吸烟者说，他们使用过电子卷烟，这比2010年时大约有10%的人使用过电子卷烟的数字有了增长。据2月28日发布的美国疾病预防与控制中心的一项研究说，所有成年人中，大约有6%尝试过电子卷烟。

　　这项研究报告的撰稿人发现，在2010年至2011年间，成年吸烟者中，包括男性和女性，白人，45岁至54岁之间，生活在南方的，现在吸烟和以前吸烟的人，使用电子卷烟的情况都出现了增长。

　　调查人员指出，在这两年里，现在吸烟的人中使用电子卷烟的要比以前吸烟的人和从不吸烟的人使用电子卷烟的多。成年人中知道电子卷烟的人的比例从2010年的大约40%增长到了2011年的60%。

　　美国疾病预防与控制中心主任汤姆·福莱顿博士在中心的一份新闻稿中说：“电子卷烟使用正在迅速增长。关于这种产品，我们还有很多不了解的地方，包括它们是否会使传统卷烟的使用减少或增加等。”

　　据美国疾病预防与控制中心的研究报告撰写人说，与传统卷烟相比，电子卷烟似乎毒素更少。但他们指出，这种装置对长期健康的影响还需要进行更多的研究。

　　撰稿人在新闻稿中说，还必须开展研究，看一看电子卷烟的营销会如何对传统卷烟的使用产生影响，尤其是在青年人当中传统卷烟的使用情况。

　　疾病预防与控制中心吸烟与健康办公室主任提姆·麦克阿菲博士在新闻稿中说：“如果大量的成年人既使用传统卷烟，也使用电子卷烟，而不是使用电子卷烟来完全戒除卷烟，那这给公共健康的影响可能会是消极的。”

One in Five U.S. Smokers Has Tried an 'E-Cigarette'

　　About one in five U.S. adult smokers has used electronic cigarettes, a new study finds.

　　E-cigarettes are battery-powered devices that deliver nicotine, flavorings and other chemicals. They turn these substances into vapor that is inhaled by the user, which is referred to as "vaping."

　　In 2011, about 21 percent of adult smokers in the United States said they had used e-cigarettes, up from about 10 percent in 2010. About 6 percent of all adults have tried e-cigarettes, according to the U.S. Centers for Disease Control and Prevention (CDC) study released Thursday.

　　Between 2010 and 2011, the use of e-cigarettes among adult smokers rose among both men and women, whites, those aged 45 to 54, people living in the South, and current and former smokers, the study authors found.

　　In both years, e-cigarette use was much higher among current smokers than among former and never smokers, the investigators noted. Awareness of e-cigarettes increased from about 40 percent of adults in 2010 to 60 percent of adults in 2011.

　　"E-cigarette use is growing rapidly. There is still a lot we don't know about these products, including whether they will decrease or increase use of traditional cigarettes," Dr. Tom Frieden, CDC director, said in an agency news release.

　　Compared to traditional cigarettes, e-cigarettes appear to have far fewer toxins, according to the CDC authors. However, the impact of the devices on long-term health need more study, they noted.

　　Research is also needed to see how e-cigarette marketing could affect the use of traditional cigarettes, especially among young people, the authors noted in the news release.

　　"If large numbers of adult smokers become users of both traditional cigarettes and e-cigarettes -- rather than using e-cigarettes to quit cigarettes completely -- the net public health effect could be quite negative," Dr. Tim McAfee, director of the CDC's Office on Smoking and Health, said in the news release. Enditem