Decreasing consumption of sugar-sweetened beverages and raising tap water consumption through Interventions based on nutrition and sustainability for kids: the DRINK study

Cluster randomized controlled trial of nutrition- and sustainability-based interventions aimed at reducing the consumption of sweetened beverages and at increasing the consumption of tap water in primary school children in French-speaking Belgium

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN99843102

Enrollment

5000

Registered

2021-06-24

Start date

2021-04-22

Completion date

Unknown

Last updated

2025-10-20

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

Conditions

Prevention of non-communicable diseases due to high consumption of sugar-sweetened beverages in primary-school children Other

Interventions

(ii) nutrition-based intervention

The French-speaking Belgian primary schools are randomized in four groups using a factorial plan: (i) control

(iii) sustainability-based intervention

and (iv) both. Interventions consist in meetings for the parents of the pupils and the school staff, in an encouragement to teachers to plan water breaks during school days, and in the provision of p

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: French-speaking regular primary schools in Wallonia and Brussels; pupils from 3rd to 5th grade at the time of the first assessment (Spring 2021)

Exclusion criteria

Exclusion criteria: Pupils whose parents have refused them to fill the questionnaires and the 4-day diary (or who have refused themselves). To note, the intervention being set at cluster level, all pupils are exposed.

Design outcomes

Primary

Measure	Time frame
Daily mean sweetened beverage consumption estimated through a 4-day diary completed by children before the beginning of the interventions in Spring 2021, and at the end of each school year of intervention in Spring 2022 and 2023	—

Secondary

Measure	Time frame
1. Potential interactions between nutrition- and sustainability-based information provided within the interventions; measured by the factorial plan at baseline, 12 and 24 months 2. Individual and family moderators in the intervention effectiveness; measured by auto-administrated questionnaires for children and parents at baseline, 12 and 24 months 3. School staff adherence to the set of interventions; measured with the identification of obstacles and facilitators in the implementation of the interventions through audits and qualitative interviews at baseline and 24 months 4. Total cost of the interventions; measures by monitoring of the project and audits of the schools at the end of the study	—

Measure

Time frame

1. Potential interactions between nutrition- and sustainability-based information provided within the interventions; measured by the factorial plan at baseline, 12 and 24 months 2. Individual and family moderators in the intervention effectiveness; measured by auto-administrated questionnaires for children and parents at baseline, 12 and 24 months 3. School staff adherence to the set of interventions; measured with the identification of obstacles and facilitators in the implementation of the interventions through audits and qualitative interviews at baseline and 24 months 4. Total cost of the interventions; measures by monitoring of the project and audits of the schools at the end of the study

—

Countries

Belgium

Contacts

Public ContactKatia Castetbon

katia.castetbon@ulb.be+32 25554017

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 10, 2026