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The effectiveness of a campaign in which children stimulate each other to drink water.


- candidate number20862
- NTR NumberNTR4885
- ISRCTNISRCTN no longer applicable
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR3-nov-2014
- Secondary IDsECSW2014-2411-273 
- Public TitleThe effectiveness of a campaign in which children stimulate each other to drink water.
- Scientific TitleA randomized control trial study on the effectiveness of a peer-supporters campaign to promote water consumption: the role of characteristics of peer-supporters and receivers.
- ACRONYM
- hypothesis
- Healt Condition(s) or Problem(s) studiedDrinking water, Overweight
- Inclusion criteriaPrimary school children between 9 and 13 years of age.
- Exclusion criteriaChildren on primary schools, who are active in a water drinking program
- mec approval receivedyes
- multicenter trialno
- randomisedyes
- masking/blindingNone
- control[default]
- groupParallel
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 5-jan-2015
- planned closingdate27-jan-2015
- Target number of participants306
- InterventionsA health intervention targeting children’s water consumption within schools will be used in a cluster-randomized controlled trial with three conditions: (1) health intervention in which influence agents are selected by peer nominations, (2) health intervention in which agents are randomly selected, and (3) control condition in which no intervention is applied.
In the peer nominations experimental condition children receive a peer nomination questionnaire at baseline in which they are asked to nominate classmates who they “want to be like”, “look up to”, “respect”, “go to for advice”, and regard as “good leaders”. Subsequently, 15% of boys and 15% of girls who receive the most nominations are invited to be trained as influence agents. In the random experimental condition a statistical program is used to randomly select 15% of boys and 15% of girls who are trained to encourage their classmates to drink more water.
The training will be delivered by two experimenters in one 90-minute session. In the first part of the training the health and environmental benefits of water are emphasized. Based on self-persuasion, children generate their own arguments for consuming more water which motivates them to internalize this behavior. In the second part of the training the role of influence agent is explained and children are asked whether they are willing to take on this role. Based on self-determination theory, children may choose in which manner they want to encourage their peers to drink more water. The influence agents receive a reusable water bottle which they could use to stimulate water consumption among their classmates.
The influence agents are asked to motivate their classmates to drink water during eight weeks. The experimenters offer them support at two follow-up sessions one and four weeks after the training.
- Primary outcomeWater consumption measured by two items indicating the average amount of consumption on a 6-point-scale (0 = zero glasses per day, 5 = five glasses per day). The portion size also includes cans, bottles, and packages.
- Secondary outcome- Water consumption intention measured by two items indicating the intentions to drink more water on schooldays and on weekend days, using a 4-point-scale (1 = certainly not, 4 = for sure)
- Consumption of sugary drinks/soda
- Self-estimated weight status
- TimepointsJanuary 2015 March 2015
- Trial web site
- statusplanned
- CONTACT FOR PUBLIC QUERIES Crystal Smit
- CONTACT for SCIENTIFIC QUERIESProf. dr. M. Buijzen
- Sponsor/Initiator Radboud University Nijmegen, Behavioural Science Institute
- Funding
(Source(s) of Monetary or Material Support)
Radboud Universiteit Nijmegen, Behavioural Science Institute
- Publications
- Brief summary
- Main changes (audit trail)
- RECORD3-nov-2014 - 11-aug-2015


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