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VETisnietVET.nl: The impact of a web-based interactive computer tailored intervention on weight gain related behaviours in youth
ISRCTN ISRCTN15743786
DOI 10.1186/ISRCTN15743786
ClinicalTrials.gov identifier
EudraCT number
Public title VETisnietVET.nl: The impact of a web-based interactive computer tailored intervention on weight gain related behaviours in youth
Scientific title
Acronym N/A
Serial number at source ZonMw: 3138
Study hypothesis 1. The intervention group will have a lower Body Mass Index (BMI)/waist circumference, compared to the control group at follow-up
2. The intervention group will have more favourable outcomes on the targeted behaviours, compared to the control group at follow-up
3. The intervention group will be more aware of their risk behaviours and have more positive attitudes, perceived behavioural control and intentions to change for their risk behaviours, compared to the control group at follow-up
4. Availability and accessibility of foods and physical activity opportunities moderates the intervention effects

In addition to testing these main hypotheses, secondary analysis will be performed to answer other relevant research questions.
Lay summary Not provided at time of registration
Ethics approval Approval received from the local medical ethics committee (Medisch Ethische Toetsings Commissie Erasmus MC [METC]) on the 7th June 2006 (ref: MEC-2005-364).
Study design Randomised, controlled, parallel group trial
Countries of recruitment Netherlands
Disease/condition/study domain No condition, healthy person
Participants - inclusion criteria Secondary schools (locations) in the municipal health organisation regions: Rotterdam and surrounding areas and Nieuwe Waterweg Noord.
Participants - exclusion criteria 1. Schools (locations) where pupils have very low reading capacity (i.e. pupils that are not able to fill in a questionnaire)
2. Schools (locations) that offer special sports education (i.e. special sports schools)
3. Schools (locations) where the pupils could not be followed-up to the third year, i.e. schools that only provide education for the first two years of secondary education (onderbouw) and where the pupils could not be tracked to other
Anticipated start date 01/06/2006
Anticipated end date 30/06/2009
Status of trial Completed
Patient information material Not available in web format, please use the contact details below to request a patient information sheet
Target number of participants 1200
Interventions Intervention group:
The pupils in the intervention schools will use a computer-tailored intervention on weight gain related behaviours (physical activity, sedentary behaviour, snack, fruit and vegetable, fibre and soft-drink consumption) during their first year of secondary school. The intervention will be used during school hours as part of the education program. The intervention will be used for an average of two hours (preferably divided by eight times 15 minutes) within ten subsequent weeks.

Control group:
The control group will receive regular school lessons. After two years the intervention will be available for the control group as well.
Primary outcome measure(s) 1. BMI calculated from measured height and weight, at baseline and two year follow-up
2. Waist circumference measured between hip bone and lowest rib, at baseline and two year follow-up
Secondary outcome measure(s) 1. Physical activity measured with self-report questionnaires plus pedometer counts (for part of the participants) at baseline, three months and two year follow-up
2. Physical condition measured with a shuttle-run-test at baseline and two year follow-up
3. Various dietary sub-behaviours, i.e. fruit and vegetable consumption, soft-drink consumption, snack consumption and fibre consumption measured with self-report questionnaires at baseline, three months and two year follow-up
4. Amount of television viewing/time spend with the computer measured with self-report questionnaires at baseline, three month and two year follow-up
5. Awareness of personal bodyweight status, overweight-related risk perceptions, weight maintenance attitudes, perceived behavioural control, and motivation to engage in weight maintenance behaviours, measured with self-report questionnaires at baseline, three months and two year follow-up
6. Determinants of change for the separate dietary, physical activity and sedentary behaviours, as measured by self-report questionnaires, distributed at baseline, three months and two year follow-up
Sources of funding The Netherlands Organisation for Health Research and Development (ZonMw) (The Netherlands)
Trial website
Publications 1. 2007 study protocol in http://www.ncbi.nlm.nih.gov/pubmed/17997834
2. 2012 results in http://www.ncbi.nlm.nih.gov/pubmed/22064878
3. 2012 evaluation in http://www.ncbi.nlm.nih.gov/pubmed/22692481
Contact name Ms  Nicole  Ezendam
  Address Erasmus Medical Centre
Department of Public Health
Room AE-139
P.O. Box 2040
  City/town Rotterdam
  Zip/Postcode 3000 CA
  Country Netherlands
  Tel +31 (0)10 408 9253
  Fax +31 (0)10 463 8474
  Email n.ezendam@erasmusmc.nl
Sponsor Erasmus Medical Centre (The Netherlands)
  Address P.O. Box 2040
  City/town Rotterdam
  Zip/Postcode 3000 CA
  Country Netherlands
  Sponsor website: http://www.erasmusmc.nl/
Date applied 11/04/2007
Last edited 24/08/2012
Date ISRCTN assigned 11/04/2007
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