Evaluation of the Impact of a Sugar-Sweetened Beverage Tax in Chile

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT02926001
Recruitment Status : Completed
First Posted : October 6, 2016
Last Update Posted : October 6, 2016
University of Chile
Information provided by (Responsible Party):
Marc Suhrcke, University of York

Brief Summary:
The purpose of this study is to evaluate formally the short term impacts of the tax policy applied to Sugar-Sweetened Beverages (SSBs) in Chile. The Impuesto Adicional a las Bebidas Analcohólicas (IABA, or "additional tax on soft drinks") in Chile was enacted in October 2014, affecting any non-alcoholic beverages to which colorants, flavourings or sweeteners have been added. For beverages above an added sugar concentration of at least 6.25 grams per 100ml (or equivalent proportion), the tax was increased from 13% to 18%, while for those below this threshold the tax was decreased to 10%, producing an 8% tax difference between these beverage groups. This impact evaluation analysis of the Chilean sugar-sweetened beverage (SSB) tax will estimate the impact of increasing the tax as well as decreasing the tax on soft drinks. The study will use household level grocery purchasing data for Chile. The purchasing records are available from October 2011 to September 2015 (three years before; and one year after the implementation of the tax in October 2014). The investigators will use a series of quasi-experimental approaches to evaluate the causal impact of the SSB tax policy on consumers' behaviour as well as on industry responses in the form of pricing and price promotion decisions.

Condition or disease
Chronic Disease Obesity

Study Type : Observational
Actual Enrollment : 2836 participants
Time Perspective: Retrospective
Official Title: Empirical Evaluation of the Short Term Impact of a Sugar-Sweetened Beverage Tax in Chile
Study Start Date : October 2011
Actual Primary Completion Date : September 2015
Actual Study Completion Date : September 2015

Primary Outcome Measures :
  1. Volume of sugar-sweetened beverage purchased [ Time Frame: October 2011 - September 2015 ]

Secondary Outcome Measures :
  1. Consumer shopping patterns - Frequency [ Time Frame: October 2011 - September 2015 ]
    Frequency of Purchasing

  2. Consumer shopping patterns - Volume [ Time Frame: October 2011 - September 2015 ]
    Volume of Purchases

  3. Market price of sugar-sweetened beverages [ Time Frame: October 2011 - September 2015 ]
  4. Body mass index of household members [ Time Frame: October 2011 - September 2015 ]

Information from the National Library of Medicine

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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
The study population is 2,836 households that arenationally representative of urban areas in Chile.

Inclusion Criteria:

  • Household in Chile that agreed to participate in the purchasing survey and provided data to a satisfactory degree for the first 2 months.

Exclusion Criteria:

  • Households that are unwilling to participate in the survey. Households that change physical address. Households with poor compliance to the survey.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT02926001

Sponsors and Collaborators
Marc Suhrcke
University of Chile
Principal Investigator: Marc Suhrcke, PhD Centre for Health Economics, University of York
Principal Investigator: Ryota Nakamura, PhD Centre for Health Economics, University of York
Principal Investigator: Andrew J Mirelman, PhD Centre for Health Economics, University of York
Principal Investigator: Cristobal Cuadrado, MD, PhD University of Chile
Principal Investigator: Nicolas Silva, MD University of Chile

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Marc Suhrcke, Professor, University of York Identifier: NCT02926001     History of Changes
Other Study ID Numbers: MR/N026640/1
First Posted: October 6, 2016    Key Record Dates
Last Update Posted: October 6, 2016
Last Verified: October 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided

Keywords provided by Marc Suhrcke, University of York:
Carbonated Beverages/economics
Diet, Food and Nutrition/economics
Energy Intake
Risk Factors

Additional relevant MeSH terms:
Chronic Disease
Disease Attributes
Pathologic Processes