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Table 2 Intervention components

From: Effectiveness of a complex intervention in reducing the prevalence of smoking among adolescents: study design of a cluster-randomized controlled trial

Component of the intervention First year (age 12-13 years) Second year (age 13-14 years) Third year (age 14-15 years) Fourth year (age 15-16 years)
School-based interventions Seven lessons: two on information about the harmful effects of smoking; four on refusal skills (self-esteem, interpersonal relationship skills, problem-solving skills, ability to recognize risky situations, and strategies for accepting rules and limits); and one on identifying social influences that encourage people to start smoking, and smoking cessation Six lessons: three about the harmful effects of smoking; one on refusal skills (interpersonal relationship skills and critical thinking); two on identifying social influences that encourage people to start smoking (tobacco company advertising campaigns, debunking false beliefs about tobacco), and smoking cessation Five lessons: three on refusal skills (strategies for accepting rules and limits, problem-solving skills, group pressure, self-esteem and coping with emotion and stress); two on identifying social influences (debunking false beliefs about tobacco, and anti-advertising workshops designed to sensitize people to the power of advertising), and smoking cessation Four lessons: one on the harmful effects of smoking; one on refusal skills (critical thinking and problem-solving skills); two on identifying social influences that encourage people to start smoking (tobacco company advertising campaigns, debunking false beliefs about tobacco), and smoking cessation
Parental interventions Two work meetings focused on parental attitudes towards drug consumption and helping parents recognize risky situations, establish rules and limits, understand the family’s role in tobacco use and the smoke-free home initiative, and implement smoking cessation Two work meetings focused on parental attitudes towards drug consumption and helping parents recognize risky situations, establish rules and limits, understand the family’s role in tobacco use and the smoke-free home initiative, and implement smoking cessation Two work meetings focused on parental attitudes towards drug consumption and helping parents recognize risky situations, establish rules and limits, understand the family’s role in tobacco use and the smoke-free home initiative, and implement smoking cessation Two work meetings focused on parental attitudes towards drug consumption and helping parents recognize risky situations, establish rules and limits, understand the family’s role in tobacco use and the smoke-free home initiative, and implement smoking cessation
Collaborate with the student on homework regarding parental tobacco habits and attitudes, social norms and passive smoking Collaborate with the student on homework regarding parental tobacco habits and attitudes, social norms and passive smoking Collaborate with the student on homework regarding parental tobacco habits and attitudes, social norms and passive smoking Collaborate with the student on homework regarding parental tobacco habits and attitudes, social norms and passive smoking
Teacher interventions Teacher training on: competences related to smoking prevention in adolescents; managing conflict situations; attitudes towards preventive activities; information on the prevalence of smokers in the educational center; and smoking cessation Smoking cessation. Smoking cessation Smoking cessation
Smoke-free policy reinforcement The schools will be invited to adopt a smoke-free environment, implement the school’s own rules, and establish rule-compliance indicators