Test of an online brief alcohol intervention aimed at drinkers in early adolescence and young adulthood

The effectiveness of a web-based brief alcohol intervention in reducing underage drinking and the added value of normative feedback: a three-arm randomised controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN50512934

Enrollment

600

Registered

2010-04-06

Start date

2008-09-01

Completion date

Unknown

Last updated

2021-01-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Alcohol abuse Mental and Behavioural Disorders Mental and behavioural disorders due to use of alcohol

Interventions

The web-based brief alcohol intervention, referred to as www.watdrinkjij.nl, was developed by professionals of the Netherlands Institute of Mental Health and Addiction (Trimbos Instituut). The trial t

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Participants are members of an online access panel 2. In the ages between 15 and 20 years, either sex 3. Participants have to fulfill criteria regarding binge drinking. For 15 to 16 year-olds this means that they have to engage in binge drinking at least once a month. For 17 to 20 year-olds, it means engaging in binge drinking at least once a week.

Exclusion criteria

Exclusion criteria: 1. Online panel members who are younger than 15 or older than 20 years old 2. Online panel members who do not meet our criteria for binge drinking

Design outcomes

Primary

Measure	Time frame
1. Weekly alcohol consumption (number of glasses per week). This measure is assessed using the Dutch version of Weekly Recall. Participants are asked to indicate retrospectively for all past 7 days, how many standard units they consumed. For example: "Yesterday it was ? (fill out the name of the day) and I consumed ? standard units". To ensure standardised responses, we provide for various beverages an overview of standard units. 2. Moderate drinking (0 = moderate drinking, 1 = no moderate drinking). Participants aged 15 - 17 years are labeled 'moderate drinkers' if they consumed no alcohol in the past week. Boys in the ages between 18 to 20 years are regarded as moderate drinkers if they consumed less than 14 alcoholic drinks in the past week and same-aged girls are regarded as moderate drinkers if they consumed less than 7 alcoholic drinks in the past week.	—

Measure

Time frame

1. Weekly alcohol consumption (number of glasses per week). This measure is assessed using the Dutch version of Weekly Recall. Participants are asked to indicate retrospectively for all past 7 days, how many standard units they consumed. For example: "Yesterday it was ? (fill out the name of the day) and I consumed ? standard units". To ensure standardised responses, we provide for various beverages an overview of standard units. 2. Moderate drinking (0 = moderate drinking, 1 = no moderate drinking). Participants aged 15 - 17 years are labeled 'moderate drinkers' if they consumed no alcohol in the past week. Boys in the ages between 18 to 20 years are regarded as moderate drinkers if they consumed less than 14 alcoholic drinks in the past week and same-aged girls are regarded as moderate drinkers if they consumed less than 7 alcoholic drinks in the past week.

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Secondary

Measure	Time frame
No secondary outcome measures.	—

Countries

Netherlands

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 30, 2026