J. Med. Internet Res. - Efficacy of a Web-based computer-tailored smoking prevention intervention for Dutch adolescents: randomized controlled trial.

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Resumo

CKGROUND: Preventing smoking initiation among adolescents is crucial to reducing tobacco-caused death and disease. This study focuses on the effectiveness of a Web-based computer-tailored smoking prevention intervention aimed at adolescents.OBJECTIVE: The intent of the study was to describe the intervention characteristics and to show the effectiveness and results of a randomized controlled trial. We hypothesized that the intervention would prevent smoking initiation among Dutch secondary school students aged 10-20 years and would have the largest smoking prevention effect among the age cohort of 14-16 years, as smoking uptake in that period is highest.METHODS: The intervention consisted of a questionnaire and fully automated computer-tailored feedback on intention to start smoking and motivational determinants. A total of 89 secondary schools were recruited via postal mail and randomized into either the computer-tailored intervention condition or the control condition. Participants had to complete a Web-based questionnaire at baseline and at 6-month follow-up. Data on smoking initiation were collected from 897 students from these schools. To identify intervention effects, multilevel logistic regression analyses were conducted using multiple imputation.RESULTS: Smoking initiation among students aged 10-20 years was borderline significantly lower in the experimental condition as compared to the control condition 6 months after baseline (OR 0.25, 95% CI 0.05-1.21, P=.09). Additional analyses of the data for the 14-16 year age group showed a significant effect, with 11.5% (24/209) of the students in the control condition reporting initiation compared to 5.7% (10/176) in the experimental condition (OR 0.22, 95% CI 0.05-1.02, P=.05). No moderation effects were found regarding gender and educational level.CONCLUSIONS: The findings of this study suggest that computer-tailored smoking prevention programs are a promising way of preventing smoking initiation among adolescents for at least 6 months, in particular among the age cohort of 14-16 years. Further research is needed to focus on long-term effects.TRIAL REGISTRATION: International Standard Randomized Controlled Trial Number (ISRCTN): 77864351; http://www.controlled-trials.com/ISRCTN77864351 (Archived by WebCite at http://www.webcitation.org/6BSLKSTm5).

Resumo Limpo

ckground prevent smoke initi among adolesc crucial reduc tobaccocaus death diseas studi focus effect webbas computertailor smoke prevent intervent aim adolescentsobject intent studi describ intervent characterist show effect result random control trial hypothes intervent prevent smoke initi among dutch secondari school student age year largest smoke prevent effect among age cohort year smoke uptak period highestmethod intervent consist questionnair fulli autom computertailor feedback intent start smoke motiv determin total secondari school recruit via postal mail random either computertailor intervent condit control condit particip complet webbas questionnair baselin month followup data smoke initi collect student school identifi intervent effect multilevel logist regress analys conduct use multipl imputationresult smoke initi among student age year borderlin signific lower experiment condit compar control condit month baselin ci p addit analys data year age group show signific effect student control condit report initi compar experiment condit ci p moder effect found regard gender educ levelconclus find studi suggest computertailor smoke prevent program promis way prevent smoke initi among adolesc least month particular among age cohort year research need focus longterm effectstri registr intern standard random control trial number isrctn httpwwwcontrolledtrialscomisrctn archiv webcit httpwwwwebcitationorgbslkstm

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