Tobacco Control Unit, Cancer Control and Prevention Programme, Institut Català d'Oncologia-ICO, L'Hospitalet de Llobregat, Barcelona, Spain; Global Clinical Epidemiology (DS&E), Novartis Farmacéutica, Barcelona, Spain.
Prev Med. 2013 Nov;57(5):585-90. doi: 10.1016/j.ypmed.2013.07.018. Epub 2013 Aug 7.
To assess the effectiveness of a multi-level (individual, family, and school) school-based intervention to prevent the exposure to secondhand smoke (SHS) in a population of schoolchildren (12-14 years old).
This was a community trial with cluster randomization of schools to an intervention and comparison group (ClinicalTrials.Gov identifier NCT01881607). The intervention targeted schoolchildren in Terrassa (Catalonia, Spain). We assessed SHS exposure in different settings and tobacco consumption by means of a questionnaire before and one year after the intervention.
We analyzed data from 1734 students with both baseline and follow-up data. The crude analysis showed that SHS exposure among students in the intervention group significantly decreased at school (-14.0%), at home (-19.9%), and on transportation (-21.8%). In the comparison group, SHS exposure significantly decreased only at home (-16.9%). After adjustment for potential confounders, the good accomplishment of the activities showed a possible trend towards a non-significant reduction in exposure at home, transportation, and leisure time.
While this school-based multi-level intervention had no overall effect in SHS exposure, the improvement of the activities focused on preventing SHS would be needed in order to achieve a significant decrease in the proportion of children exposed to SHS.
评估一项多层次（个体、家庭和学校）基于学校的干预措施在防止儿童（12-14 岁）接触二手烟（SHS）方面的有效性。
这是一项社区试验，采用学校整群随机分组的方法分为干预组和对照组（ClinicalTrials.Gov 标识符 NCT01881607）。该干预措施针对的是西班牙加泰罗尼亚地区特拉萨的学生。我们在干预前和干预一年后通过问卷调查评估了不同环境中的 SHS 暴露情况和烟草消费情况。
我们分析了 1734 名具有基线和随访数据的学生的数据。初步分析显示，干预组学生在校内（-14.0%）、在家中（-19.9%）和在交通工具上（-21.8%）的 SHS 暴露显著减少。在对照组中，仅在家中（-16.9%）的 SHS 暴露显著减少。在调整了潜在混杂因素后，活动的良好实施显示出在家中、交通工具和休闲时间暴露减少的趋势，但无统计学意义。
虽然这种基于学校的多层次干预措施在 SHS 暴露方面没有总体效果，但需要改进预防 SHS 的活动，以实现儿童接触 SHS 比例的显著下降。
