青少年吸烟已成为世界公众普遍关注的问题,这是目前影响青少年健康的重要因素之一。各国对青少年吸烟情况,引起吸烟的因素及对健康的影响有广泛的报导。我国青少年吸烟情况一般认为比较普遍,但有关这方面的系统报导很少,本调查目的在于了解北京市中学生的吸烟现况及与吸烟有关的一 Smoking among adolescents has become a widespread concern of the general public in the world. It is one of the important factors affecting the health of adolescents. Countries have widely reported the smoking situation of adolescents, the factors that cause smoking and their health effects. The prevalence of smoking in adolescents in China is generally considered to be relatively common, but there are few systematic reports on this area. The purpose of this survey is to understand the prevalence of smoking among middle school students in Beijing and one related to smoking