Institute for Therapy and Health Research, Harmsstr 2, Kiel 24114, Germany.
J Epidemiol Community Health. 2012 Apr;66(4):334-41. doi: 10.1136/jech.2009.107490. Epub 2010 Nov 11.
The Smokefree Class Competition, a school-based smoking prevention intervention, is widely disseminated in Europe. Participating classes commit themselves to be smoke-free and self-monitor their smoking status. Classes that remain smoke-free for 6 months can win prizes. Effects of the intervention on current smoking, initiation and progression of smoking were investigated.
Cluster randomised controlled trial. 84 schools (208 classes with 3490 students; mean age 12.6 years, 50.4% female) in Saxony-Anhalt, Germany, were randomly assigned to intervention or control condition. A baseline survey was conducted before the implementation of the programme, while post-test and follow-up surveys were carried out 7 (immediately after the end of the competition), 12 and 19 months after baseline. Effects of participation in the programme on current and lifetime smoking were analysed by multilevel models controlling for confounding variables.
Intervention students smoking occasionally at baseline smoked less frequently than students taking not part in the intervention at 7 and 12 months after baseline. Persistent beneficial programme effects were also found for lifetime smoking: intervention students were less likely to progress from experimental to established use.
Data suggest that Smokefree Class Competition reduces the probability of progressing from occasional and experimental stages of smoking to more established forms of use.
Trial registration ISRCTN27091233 in Current Control Trial Register.
Smokefree Class Competition（无烟班级竞赛）是一种基于学校的预防吸烟干预措施，在欧洲得到广泛推广。参与班级承诺保持无烟状态，并自行监测吸烟状况。如果班级能够在 6 个月内保持无烟状态，就有机会获得奖品。本研究旨在调查该干预措施对当前吸烟、吸烟起始和吸烟进展的影响。
采用整群随机对照试验。在德国萨克森-安哈尔特州，84 所学校（208 个班级，共 3490 名学生；平均年龄 12.6 岁，50.4%为女性）被随机分配到干预组或对照组。在方案实施前进行基线调查，在竞赛结束后立即进行 7 个月、12 个月和 19 个月的随访调查。采用多水平模型分析参与该方案对当前和终身吸烟的影响，同时控制混杂因素。
基线时有偶尔吸烟行为的干预组学生，在 7 个月和 12 个月时的吸烟频率均低于未参与干预组的学生。在终身吸烟方面，也发现了持续的有益方案效果：干预组学生从实验性吸烟向固定性吸烟转变的可能性较低。
数据表明，Smokefree Class Competition 降低了从偶尔吸烟和实验性吸烟阶段向更固定吸烟形式发展的可能性。
在当前对照试验注册库中注册的 ISRCTN27091233 号。
