2010年中国成人烟草流行监测显示,15岁以上人群吸烟率为28.1%,其中男性占52.9%。52.7%的吸烟者在20岁之前已成为每日吸烟者[1],且青少年开始吸烟呈现低龄化趋势[2]。此外,50%的青少年在家庭和公共场所遭受二手烟的危害[3]。笔者于2011年对南京市4所中学生吸烟行为及影响因素进行探讨,为开展青少年控烟干预提供依据。1对象与方法 1.1对象在南京市雨花区和高淳县选取初中和高中学校各2所,以班级为最小抽样单位,分层抽取初一~高三年级学生,每所学校至少抽取初中生390名、高 In 2010, the adult tobacco epidemic surveillance in China showed that the prevalence of smoking was 28.1% among the population over the age of 15, with males accounting for 52.9%. 52.7% of smokers have become daily smokers by the age of 20 [1], and adolescents begin to smoke at a younger age [2]. In addition, 50% of adolescents suffer from secondhand smoke at home and in public places [3]. In 2011, the author discusses the smoking behavior and influencing factors of four middle school students in Nanjing, and provides the basis for adolescent tobacco control intervention. 1 Subjects and Methods 1.1 Subjects In the Yuhua District of Nanjing and Gaochun county selected two junior high schools and high schools, the class as the smallest sampling unit, stratified extraction of the first to third grade students, each school at least 390 junior high school students ,high