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Effects of a price increase on purchases of sugar sweetened beverages. Results from a randomized controlled trial.
Appetite. 2014 Jul; 78:32-9.A

Abstract

Sugar sweetened beverage (SSB) taxes are receiving increased political interest. However, there have been no experimental studies of the effects of price increases on SSBs or the effects on close substitutes such as diet drinks, alcohol or sugary snacks. Therefore, the aim of this study was to examine the effects of a price increase on SSBs on beverage and snack purchases using a randomized controlled design within a three-dimensional web-based supermarket. The trial contained two conditions: experimental condition with a 19% tax on SSBs (to reflect an increase in Dutch value added tax from 6% to 19%); and a control condition with regular prices. N = 102 participants were randomized and purchased groceries on a single occasion at a three-dimensional Virtual Supermarket. Data were analysed using independent t-tests and regression analysis. Results showed that participants in the price increase condition purchased significantly less SSBs than the control group (B = -.90; 95% CI = -1.70 to -.10 L per household per week). There were no significant effects on purchases in other beverage or snack food categories. This means that the higher VAT rate was effective in reducing SSB purchases and had no negative side-effects.

Authors+Show Affiliations

Department of Health Sciences and the EMGO Institute for Health and Care Research, Faculty of Earth and Life Sciences, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands; National Institute for Health Innovation, School of Population Health, The University of Auckland, Tamaki Campus, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand. Electronic address: w.waterlander@nihi.auckland.ac.nz.National Institute for Health Innovation, School of Population Health, The University of Auckland, Tamaki Campus, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand.Department of Health Sciences and the EMGO Institute for Health and Care Research, Faculty of Earth and Life Sciences, VU University Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, The Netherlands.

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24667153

Citation

Waterlander, Wilma Elzeline, et al. "Effects of a Price Increase On Purchases of Sugar Sweetened Beverages. Results From a Randomized Controlled Trial." Appetite, vol. 78, 2014, pp. 32-9.
Waterlander WE, Ni Mhurchu C, Steenhuis IH. Effects of a price increase on purchases of sugar sweetened beverages. Results from a randomized controlled trial. Appetite. 2014;78:32-9.
Waterlander, W. E., Ni Mhurchu, C., & Steenhuis, I. H. (2014). Effects of a price increase on purchases of sugar sweetened beverages. Results from a randomized controlled trial. Appetite, 78, 32-9. https://doi.org/10.1016/j.appet.2014.03.012
Waterlander WE, Ni Mhurchu C, Steenhuis IH. Effects of a Price Increase On Purchases of Sugar Sweetened Beverages. Results From a Randomized Controlled Trial. Appetite. 2014;78:32-9. PubMed PMID: 24667153.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of a price increase on purchases of sugar sweetened beverages. Results from a randomized controlled trial. AU - Waterlander,Wilma Elzeline, AU - Ni Mhurchu,Cliona, AU - Steenhuis,Ingrid H M, Y1 - 2014/03/22/ PY - 2013/07/12/received PY - 2014/02/23/revised PY - 2014/03/13/accepted PY - 2014/3/27/entrez PY - 2014/3/29/pubmed PY - 2014/12/30/medline KW - Nutrition KW - Pricing strategies KW - Randomized controlled trial KW - Soft drinks KW - Sugar sweetened beverages KW - Supermarket KW - Taxes KW - Virtual supermarket SP - 32 EP - 9 JF - Appetite JO - Appetite VL - 78 N2 - Sugar sweetened beverage (SSB) taxes are receiving increased political interest. However, there have been no experimental studies of the effects of price increases on SSBs or the effects on close substitutes such as diet drinks, alcohol or sugary snacks. Therefore, the aim of this study was to examine the effects of a price increase on SSBs on beverage and snack purchases using a randomized controlled design within a three-dimensional web-based supermarket. The trial contained two conditions: experimental condition with a 19% tax on SSBs (to reflect an increase in Dutch value added tax from 6% to 19%); and a control condition with regular prices. N = 102 participants were randomized and purchased groceries on a single occasion at a three-dimensional Virtual Supermarket. Data were analysed using independent t-tests and regression analysis. Results showed that participants in the price increase condition purchased significantly less SSBs than the control group (B = -.90; 95% CI = -1.70 to -.10 L per household per week). There were no significant effects on purchases in other beverage or snack food categories. This means that the higher VAT rate was effective in reducing SSB purchases and had no negative side-effects. SN - 1095-8304 UR - https://www.unboundmedicine.com/medline/citation/24667153/Effects_of_a_price_increase_on_purchases_of_sugar_sweetened_beverages__Results_from_a_randomized_controlled_trial_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0195-6663(14)00127-5 DB - PRIME DP - Unbound Medicine ER -