Two-year effects of a school-based prevention programme on adolescent cigarette smoking in Guangzhou, China: a cluster randomized trial

摘要: Background The prevalence of adolescent smoking has been increasing rapidly in China. Theory-based prevention programmes schools may be an effective approach preventing among Chinese adolescents. Methods A school-level cluster randomized controlled trial was conducted 7th and 8th grade students (N = 2343) four junior high southern China during 2004–06. theory-based, multi-level intervention compared with the standard health curriculum. Outcome measures comprised changes students’ smoking-related knowledge, attitudes behaviour. Results mean knowledge scores from baseline to 1- 2-year follow-ups increased more group than control group, whereas there little change attitude scores. At 1-year follow-up (the total sample), interventions reduced probability experimental smokers’ escalating regular smoker [7.9 vs 18.3%; adjusted odds ratio (OR) 0.34, 95% confidence interval (CI) 0.12–0.97, P 0.043], but did not reduce non-smokers’ initiating (7.9 10.6%; OR 0.86, CI 0.54–1.38, 0.538). (only students), similar proportions non-smokers initiated (13.5 13.1%), while a possibly lower proportion smokers escalated (22.6 40.0%; 0.43, 0.12–1.57, 0.199). Conclusions This programme had moderate effect on inhibiting escalation adolescents, initiation smoking. improved adolescents’ their towards