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Targeting young drinkers online: The effectiveness of a web-based brief alcohol intervention in preventing excessive drinking patterns among adolescents with a low educational background.


- candidate number10072
- NTR NumberNTR2971
- ISRCTNISRCTN wordt niet meer aangevraagd.
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR6-jul-2011
- Secondary IDs50-50110-96-682 ZonMw
- Public TitleTargeting young drinkers online: The effectiveness of a web-based brief alcohol intervention in preventing excessive drinking patterns among adolescents with a low educational background.
- Scientific TitleTargeting young drinkers online: The effectiveness of a web-based brief alcohol intervention in preventing excessive drinking patterns among adolescents with a low educational background.
- ACRONYMWeb-based brief alcohol intervention
- hypothesisThe present study will test the effectiveness of a web-based brief alcohol intervention that is aimed at reducing heavy drinking among adolescents with a low educational background, that is participants of secondary schools (VMBO) and institutions for professional education (ROC) in the ages between 15 and 20 years in a Dutch sample. We expect that a larger percentage of participants in the experimental condition will drink within the normative limits of the Dutch National Health Council for low-risk drinking compared to the control condition as a direct result of the intervention. This means that their consumption will not exceed a mean heavy alcohol use consumption of more than 7 (girls aged 15-16 years), 12 (boys aged 15-16 years), 14 (females aged 17-20 years) or 21 (men aged 17-20 years) glasses of standard units of alcohol per week and/or, in case of binge drinking, 5 or more glasses of standard units of alcohol on one drinking occasion at least once per month and week for boys and girls aged 15-16 years and men and females aged 17-20 years respectively at 1 month and 6 months after the intervention. It was hypothesized that reductions in mean weekly alcohol consumption and frequency of binge drinking would occur in both arms, but exposure to the web-based brief alcohol intervention would be more effective than receiving no intervention.
- Healt Condition(s) or Problem(s) studiedAdolescents, Alcohol
- Inclusion criteria1. Adolescents of secondary schools (VMBO) and institutions for professional education (ROC) aged between 15 and 20 years, either sex; 2. Adolescents report heavy drinking in the past 6 months. Heavy drinking is based on measures of heavy alcohol use and binge drinking and differs according to adolescents’ sex and age. We will differentiate adolescents aged 15-16 years and adolescents aged 17-20 years. Adolescents aged 15-16 years will be included if they report heavy alcohol use in the past month and/or binge drinking at least once per month in the past 6 months. For this age group, heavy alcohol use is defined as having a mean consumption rate of more than 7 (girls) or 12 (boys) glasses of standard units of alcohol per week in the past month. Binge drinking is defined as drinking 5 or more glasses of standard units of alcohol at one drinking occasion at least once per month. Adolescents aged 17-20 years will be included if they report heavy alcohol use in the past month and/or binge drinking at least once per week in the past 6 months. For this age group, heavy alcohol use is defined as an alcohol consumption exceeding the Dutch National Health Council for low-risk drinking – a mean consumption rate of more than 14 (females) or 21 (men) glasses of standard units of alcohol per week. Binge drinking is defined as drinking 5 of more glasses of standard units of alcohol on one drinking occasion at least once per week; 3. Adolescents are in the (pre)contemplation stage of change.
- Exclusion criteriaAdolescents who are problem drinkers, drinkers who show symptoms of alcohol abuse or dependence and/or receive treatment for drinking-related problems, will be excluded from participation.
- mec approval receivedno
- multicenter trialno
- randomisedyes
- masking/blindingSingle
- controlActive
- groupParallel
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 1-sep-2011
- planned closingdate1-jun-2012
- Target number of participants749
- InterventionsParticipants will be allocated at random to either the experimental condition – exposure (± 20 minutes) to a web-based brief alcohol intervention – or control condition – no intervention. In addition, the participating institutions for secondary education (VMBO) and professional education (ROC) are being offered a reward “Workshop Reclamebureau” after their students completing the total follow up period. During this workshop students are being asked to evaluate a commercial about healthy choices and social influence.
- Primary outcomeThe percentage of participants who drink within the normative limits of the Dutch National Health Council for low-risk drinking and thereby not exceeding a mean consumption rate of more than 7 (girls aged 15-16 years), 12 (boys aged 15-16 years), 14 (females aged 17-20 years) or 21 (men aged 17-20 years) glasses of standard units of alcohol per week and/or drink 5 or more glasses of standard units of alcohol on one drinking occasion at least once per month and week for boys and girls aged 15-16 years and men and females aged 17-20 years respectively at 1 month and 6 months after the intervention. In addition, we will assess reductions in mean weekly alcohol consumption and frequency of binge drinking.
- Secondary outcomeAttitudes, self-efficacy, and subjective norms will be assessed as secondary outcome measures. These alcohol-related cognitions will be included at baseline and 1 and 6 months after the intervention.
- TimepointsBaseline, 1 and 6 months.
- Trial web siteN/A
- statusplanned
- CONTACT FOR PUBLIC QUERIESMSc. Carmen Voogt
- CONTACT for SCIENTIFIC QUERIESProf. Dr. Rutger C.M.E. Engels
- Sponsor/Initiator Radboud University Medical Center Nijmegen, Trimbos-institute - Netherlands Institute of Mental Health and Addiction
- Funding
(Source(s) of Monetary or Material Support)
ZON-MW, The Netherlands Organization for Health Research and Development
- PublicationsN/A
- Brief summaryThe aim of the project is to test the effectiveness of a web-based brief alcohol intervention that is aimed at reducing heavy drinking among adolescents with a low educational background, that is participants of secondary schools (VMBO) and institutions for professional education (ROC) in the ages between 15 and 20 years in a Dutch sample. A randomized controlled trial (RCT) trial with a 1 factor (two levels: experimental versus control condition) pre-post test design will be conducted. Measurements on mean weekly alcohol consumption and binge drinking will be employed and assessments on alcohol related cognitions will be conducted at baseline, and 1 month and 6 months after the intervention.
- Main changes (audit trail)
- RECORD6-jul-2011 - 18-sep-2011


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