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"Drinking Less an online self-help intervention for problem drinkers in the general population: Results from an online randomised clinical trial.


- candidate number1217
- NTR NumberNTR131
- ISRCTNISRCTN47285230
- Date ISRCTN created20-dec-2005
- date ISRCTN requested18-okt-2005
- Date Registered NTR23-aug-2005
- Secondary IDsN/A 
- Public Title"Drinking Less an online self-help intervention for problem drinkers in the general population: Results from an online randomised clinical trial.
- Scientific Title"Drinking Less an online self-help intervention for problem drinkers in the general population: Results from an online randomised clinical trial.
- ACRONYMDrinking Less
- hypothesisWe tested the hypothesis of the superior effectiveness of an online preventive self help intervention for problem drinkers based on cognitive-behavioural self control principles vis--vis an online psycho-education brochure for problem drinkers.
- Healt Condition(s) or Problem(s) studiedAlcoholism, Alcohol abuse
- Inclusion criteriaParticipants were eligible to participate if they were between 18 and 65 years of age, had a weekly alcohol consumption of more than 21 units (210 g) (men) or more than 14 units (140 g) (women) and or who were consuming more than 5 units of alcohol (50 g) (men) or 3 units of alcohol (30 g) (women) on one or more days a week in the past three months and who had access to a computer and internet.
- Exclusion criteriaParticipants who received professional help, participated in a self help grou and/or medication for their drinking problems (last year) and those who participated in a conflicting scientific study.
- mec approval receivedyes
- multicenter trialno
- randomisedyes
- masking/blindingNone
- controlActive
- groupParallel
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 1-jun-2003
- planned closingdate31-okt-2004
- Target number of participants268
- InterventionsThe experimental condition received the Drinking Less Intervention.
DrinkingLess is a webbased self help intervention for problem drinkers who want to reduce their alcohol consumption without any direct professional guidance.
It is based on cognitive-behavioural self control principles.
The program consists of four phases:
preparation, decision and goal setting, conduct and maintenance.
The intervention provides support to problem drinkers through techniques such as a montioring log book, educational information and exercises. It also allows different participants to exchange information and experiences with one another through an internet forum. Participants are advised to use the intervention for a period of six weeks.

The control group received access to a brief webbased alcohol information brochure in which the impact of alcohol on body, mind and functioning and the limits for safe alcohol consumption are discussed.
- Primary outcome1. Mean weekly alcohol consumption:number of units (10 g pure alcohol) in the past 7 days;
2. Proportion of subjects not at-risk, i.e. drinking 21 units or less a week (men) and 14 units or less a week (women);
3. Proportion of subjects not drinking hazourdously: i.e. not drinking more than 5 units (men) or 3 units (women) on any day a week in the past three months;
4. Proportion of subjects not drinking at risk and/or hazourdously (as defined under 2 and 3);
5. Proportion of subjects not drinking at risk and/or hazourdously (as defined under 4) and who do not experience alcohol related problems.
- Secondary outcome1. Quality of life;
2. Psychological well being;
3. Satisfaction with the interventions.
- TimepointsN/A
- Trial web sitehttp://www.mindrdrinkenonderzoek.nl (not in use any more)
- statusstopped: trial finished
- CONTACT FOR PUBLIC QUERIESDrs. H. Riper
- CONTACT for SCIENTIFIC QUERIESDrs. H. Riper
- Sponsor/Initiator 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
- PublicationsAddiction. 2008 Feb;103(2):218-27.
- Brief summaryA randomised controlled trial (RCT) was designed which could be conducted entirely via the internet.
Not only the tested interventions were provided to the respondents via the internet, but also the information, instructions and questionnaires for the trial.
Advertisements in Dutch nationwide newspapers and on an internet website were used to recruit 335 potential respondents. After screening them online for eligibility, we selected 268 persons for inclusion in the sample: they were consuming more alcohol than the guidelines for sensible drinking recommend.
After they completed a baseline questionnaire, we randomly determined whether respondents would use the online self-help intervention MinderDrinken (134 persons) or an online information leaflet about alcohol use (likewise 134 persons).
Six months and twelve months later, we once again recorded the alcohol consumption of the two groups.
- Main changes (audit trail)
- RECORD16-aug-2005 - 16-jun-2008


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