J. Med. Internet Res. - Internet-based brief personalized feedback intervention in a non-treatment-seeking population of adult heavy drinkers: a randomized controlled trial.

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Resumo

CKGROUND: Internet-based interventions for heavy drinkers show promising results, but existing research is characterized by few studies in nonstudent adult populations and few comparisons with appropriate control groups.OBJECTIVE: To test whether a fully automated Internet-based brief personalized feedback intervention and a fully automated Internet-based personalized brief advice intervention in a non-treatment-seeking population of heavy drinkers would result in a reduced alcohol intake.METHODS: We conducted a 3-arm parallel randomized controlled trial in a general population-based sample of heavy drinkers. The 54,157 participants (median age of 58 years) were screened for heavy drinking. Of the 3418 participants who had a weekly alcohol consumption above 14 drinks for women and 21 drinks for men, 1380 (619 women) consented to take part in the trial and were randomly assigned to an Internet-based brief personalized feedback intervention group (normative feedback, n = 476), an Internet-based personalized brief advice intervention group (n = 450), or a nonintervention control group (n = 454). Follow-up after 6 and 12 months included 871 and 1064 participants, respectively, of all groups combined. The outcome measure was self-reported weekly alcohol consumption. We analyzed the data according to the intention-to-treat principle. To examine changes over time and to account for the multiple time measurements, we used a multilevel linear mixed model. To take attrition into account, we used multiple imputation to address missing data.RESULTS: The intervention effect of the Internet-based brief personalized feedback intervention, determined as the mean additional difference in changes in alcohol consumption in the Internet-based brief personalized feedback intervention compared with the control group, was -1.8 drinks/week after 6 months and -1.4 drinks/week after 12 months; these effects were nonsignificant (95% confidence interval -4.0 to 0.3 at 6 months, -3.4 to 0.6 at 12 months). The intervention effect of the Internet-based personalized brief advice intervention was -0.5 drinks/week after 6 months and -1.2 drinks/week after 12 months; these effects were nonsignificant (95% confidence interval -2.7 to 1.6 at 6 months, -3.3 to 0.9 at 12 months).CONCLUSIONS: In this randomized controlled trial we found no evidence that an Internet-based brief personalized feedback intervention was effective in reducing drinking in an adult population of heavy drinkers.TRIAL REGISTRATION: ClinicalTrials.gov NCT00751985; http://clinicaltrials.gov/ct2/show/NCT00751985 (Archived by WebCite at http://www.webcitation.org/68WCRLyaP).

Resumo Limpo

ckground internetbas intervent heavi drinker show promis result exist research character studi nonstud adult popul comparison appropri control groupsobject test whether fulli autom internetbas brief person feedback intervent fulli autom internetbas person brief advic intervent nontreatmentseek popul heavi drinker result reduc alcohol intakemethod conduct arm parallel random control trial general populationbas sampl heavi drinker particip median age year screen heavi drink particip week alcohol consumpt drink women drink men women consent take part trial random assign internetbas brief person feedback intervent group normat feedback n internetbas person brief advic intervent group n nonintervent control group n followup month includ particip respect group combin outcom measur selfreport week alcohol consumpt analyz data accord intentiontotreat principl examin chang time account multipl time measur use multilevel linear mix model take attrit account use multipl imput address miss dataresult intervent effect internetbas brief person feedback intervent determin mean addit differ chang alcohol consumpt internetbas brief person feedback intervent compar control group drinksweek month drinksweek month effect nonsignific confid interv month month intervent effect internetbas person brief advic intervent drinksweek month drinksweek month effect nonsignific confid interv month monthsconclus random control trial found evid internetbas brief person feedback intervent effect reduc drink adult popul heavi drinkerstri registr clinicaltrialsgov nct httpclinicaltrialsgovctshownct archiv webcit httpwwwwebcitationorgwcrlyap

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