Leatherdale Scott T, Cameron Roy, Brown K Stephen, Jolin Mari Alice, Kroeker Christina
Division of Preventive Oncology, Cancer Care Ontario, Toronto, Canada.
Prev Med. 2006 Mar;42(3):218-22. doi: 10.1016/j.ypmed.2005.11.019. Epub 2006 Jan 9.
This study examined how older smoking peers at school and the smoking behaviour of friends and family members are related to youth smoking.
Multi-level logistic regression analysis was used to examine correlates of ever smoking in a sample of 4286 grade 6 and 7 students from 57 elementary schools in Ontario, Canada (2001).
Each 1% increase in the smoking rate among grade 8 students increased the odds that a student in grades 6 or 7 was an ever smoker versus never smoker [OR 1.05, 95% CI 1.02 to 1.08]. A low-risk student (no family or friends who smoke) was almost three times more likely to try smoking if he/she attended an elementary school with a relatively high prevalence of senior students who smoke than if he/she attended a school with a low prevalence of senior students who smoke.
Low-risk grade 6 and 7 students are at significantly greater risk of smoking if they attend an elementary school with a relatively high prevalence of smoking among senior students. Prevention programs should target both at-risk schools and at-risk students.
本研究探讨了学校里吸烟的年长同龄人以及朋友和家庭成员的吸烟行为与青少年吸烟之间的关系。
采用多水平逻辑回归分析，对来自加拿大安大略省57所小学的4286名六年级和七年级学生（2001年）样本中曾经吸烟的相关因素进行研究。
八年级学生吸烟率每增加1%，六年级或七年级学生曾经吸烟与从不吸烟相比的几率就增加[比值比1.05，95%可信区间1.02至1.08]。如果一名低风险学生（没有吸烟的家人或朋友）就读于高年级学生吸烟率相对较高的小学，那么他/她尝试吸烟的可能性几乎是就读于高年级学生吸烟率较低小学的学生的三倍。
如果六年级和七年级的低风险学生就读于高年级学生吸烟率相对较高的小学，他们吸烟的风险会显著增加。预防项目应针对有风险的学校和有风险的学生。
