不同干预频次对降低中学生吸烟率效果分析

Effects of intervention of different frequency on decreasing smoking prevalence among junior high school students

目的评价基于学校的青少年吸烟干预计划对降低初中生吸烟率的干预效应,探索不同次数干预的效应差异。方法将25所初中学校随机分为3组,分别为对照组、1次干预组和3次干预组。每所学校的初中一年级学生均为研究对象。在每次干预后6个月时对3组进行一次问卷调查。结果1次干预组在干预后一年半时的吸烟率显著低于对照组（OR=0.56,95%CI=0.33～0.87）;3次干预组在第2次干预后（OR=0.32,95%CI=0.15～0.63）和第3次干预后（OR=0.27,95%CI=0.13～0.48）吸烟率均显著低于对照组。同时发现,在第3次干预后3次干预组的吸烟率显著低于1次干预组（OR=0.48,95%CI=0.28～0.81）。结论本研究所实施的干预能有效地降低初中生吸烟率,且3次干预的效应强于1次干预。

Objective To evaluate the effects of a school- based smoking intervention among adolescents in junior high schools, and to explore the difference in effects of once and multi - intervention. Methods Twenty - five junior high schools were randomly assigned into three groups, which were control group, once - intervention group and three - times intervention group respectively. All students from the seventh grade of each school were subjects. Every six months after each intervention there was a questionnaire investigation carried out among the three groups. Results One and half years after intervention, the smoking prevalence of once - intervention group was significantly lower than the control group（ OR = 0.56, 95% CI = 0.33-0.87）. After the second（ OR = 0.32, 95% CI = 0.15 - 0.63） and third intervention（ OR = 0.27, 95% CI = 0.13 - 0.48）. There were fewer smokers in three- times intervention group than the control group. Meanwhile, the smoking prevalence in after the three - time intervention group was found significantly lower than that of once - intervention group third intervention（ OR = 0.48,95 % CI = 0.28- 0.81）. Conclusion The intervention delivered in the study was effective on reducing tobacco use among students in junior high schools and the effect of three-times intervention on decreasing smoking prevalence was stronger than once- intervention.