Try our beta test site
IMPORTANT: Listing of a study on this site does not reflect endorsement by the National Institutes of Health. Talk with a trusted healthcare professional before volunteering for a study. Read more...

Promoting Water Consumption for Prevention of Overweight in School Children in a Controlled Intervention Trial (trinkfit)

This study has been completed.
Information provided by:
Research Institute of Child Nutrition, Dortmund Identifier:
First received: November 5, 2007
Last updated: May 27, 2009
Last verified: May 2009
A major goal in public health is to find effective, feasible and simple programs for overweight prevention among children. This controlled intervention study evaluates a simple environmental and behavioral modification for its efficacy in preventing overweight of children in the school setting. The intervention strategy focuses solely on the promotion of drinking tap water. The study was conducted in 32 elementary schools including about 3000 children in two German cities over 1 school year.

Condition Intervention
Behavioral: environmental and behavioral change

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Prevention
Official Title: Promoting Water Consumption for Prevention of Overweight in School Children in a Controlled Intervention Trial

Resource links provided by NLM:

Further study details as provided by Research Institute of Child Nutrition, Dortmund:

Primary Outcome Measures:
  • Overweight [ Time Frame: one school year ]

Secondary Outcome Measures:
  • Intake of Drinks [ Time Frame: one school year ]
  • Physical Activity and Inactivity [ Time Frame: one school year ]
  • Water Flow of the Water Dispensers [ Time Frame: one school year ]
  • Parameters of Process Evaluation (Acceptance, Feasibility) [ Time Frame: 1,5 years ]

Enrollment: 2950
Study Start Date: April 2006
Study Completion Date: December 2008
Primary Completion Date: June 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
No Intervention: Control group
Control schools had school curriculum as usual and did not receive environmental intervention.
Experimental: Intervention group
Intervention schools received water dispensers, drinking bottles and lessons as intervention.
Behavioral: environmental and behavioral change
In intervention schools a water dispenser was installed and children received water bottles as environmental intervention. Children also received a 6-hour-curriculum about the importance of water for the body that were held by the teachers.

Detailed Description:

Soft drinks and other caloric beverages are supposed to be involved in the development of overweight and obesity in children. The intervention strategy of our study was to promote water consumption by facilitating access to tap water in schools assuming a concomitant decrease in caloric soft drinks at least at school. The environmental modification of installing a water dispenser at school and delivering a special bottle to each child in the intervention schools was supported by a few educational lessons. These lessons were held by the class teachers who received a prepared 6-hour curriculum dealing with the importance of water for the body and of water intake. For the study 17 randomly selected schools were assigned to the intervention group, 15 schools to the control group that did not receive any intervention. Body weight and height to calculate BMI as primary outcome were assessed at baseline and after the intervention period of 1 school year. As secondary outcome drinking and physical activity habits were evaluated at baseline and after the intervention. The water flow of the dispenser was measured at regular intervals. In addition, data of process evaluation was collected to measure acceptance and feasibility of the intervention in the school setting.

To analyze the efficacy of this primarily environmental and behavioral intervention, incidence and prevalence was compared between intervention and control group.


Ages Eligible for Study:   7 Years to 9 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • All children in 2nd and 3rd grade of selected elementary schools

Exclusion Criteria:

  • parental consent
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00554294

Sponsors and Collaborators
Research Institute of Child Nutrition, Dortmund
Principal Investigator: Mathilde Kersting, PhD Research Insitute of Child Nutrition
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Research Institute of Child Nutrition, Dortmund Identifier: NCT00554294     History of Changes
Other Study ID Numbers: 05HS026
Study First Received: November 5, 2007
Results First Received: March 31, 2009
Last Updated: May 27, 2009

Keywords provided by Research Institute of Child Nutrition, Dortmund:
primary prevention
environmental change
behavioural change
school setting
changing of drinking habits
promotion of drinking tap water

Additional relevant MeSH terms:
Body Weight
Signs and Symptoms processed this record on May 25, 2017