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The influence of different food taxes on food purchases in a virtual supermarket


- candidate number21108
- NTR NumberNTR4967
- ISRCTNISRCTN no longer applicable
- Date ISRCTN created
- date ISRCTN requested
- Date Registered NTR3-dec-2014
- Secondary IDs21108 21108
- Public TitleThe influence of different food taxes on food purchases in a virtual supermarket
- Scientific TitleThe influence of different food taxes on food purchases in a virtual supermarket
- ACRONYM
- hypothesisThe hypothesis is that less calories are purchased in the food tax conditions compared to the control condition
- Healt Condition(s) or Problem(s) studiedObesity, Cardiovascular disease, Diabetes Mellitus Type 2 (DM type II), Food tax
- Inclusion criteriaInclusion criteria are: I) adults (18+ yr.) who regularly purchase foods in a supermarket, ii) sufficient knowledge of the Dutch language, III) access to computer + internet
- Exclusion criteriapeople who do not comply with the inclusion criteria
- mec approval receivedno
- multicenter trialno
- randomisedyes
- masking/blindingSingle
- controlActive
- groupParallel
- Type2 or more arms, randomized
- Studytypeintervention
- planned startdate 15-dec-2014
- planned closingdate1-apr-2014
- Target number of participants700
- InterventionsThree tax-conditions (1) sugar-tax, 2) saturated fat-tax and 3) nutrient profiling-tax) increasing the price of relevant food products with 25%, compared to a control condition (no increase in price) in a virtual supermarket. The Virtual Supermarket is a Dutch-developed three-dimensional software application in which study participants can shop in a manner comparable to a real supermarket.
- Primary outcome- difference in total calories (kcal) purchased between each tax-condition and the control condition.
- Secondary outcome- Percentage of purchased healthy and non healthy foods between each tax-condition and the control condition.
- Timepoints1 time point. Participants will visit the virtual supermarket once and complete a questionnaire afterwards.
- Trial web sitenone
- statusplanned
- CONTACT FOR PUBLIC QUERIESprof. dr Ingrid Steenhuis
- CONTACT for SCIENTIFIC QUERIESprof. dr Ingrid Steenhuis
- Sponsor/Initiator VU University Medical Center
- Funding
(Source(s) of Monetary or Material Support)
ZON-MW, The Netherlands Organization for Health Research and Development
- Publicationswill follow
- Brief summaryResearch into the effectiveness of pricing interventions and especially tax measures is scarce. Evidence thus far, indicates price as an important factor in food choice. In addition, energy-dense foods tend to be cheaper and more healthful foods tend to be more expensive. Furthermore, the evidence points in the direction of taxing unhealthy foods as a better strategy to limit energy intake than subsidizing healthy food. An RCT will be conducted with 3 different taxing conditions (taxing levels will be set on 25% in all conditions) and a control group will be conducted.
- Main changes (audit trail)
- RECORD3-dec-2014 - 12-mrt-2015


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