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

NCT ID: NCT02926001

Last Updated: 2016-10-06

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 2836 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2011-10-31
• Study Completion Date: 2015-09-30

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.

Conditions

Chronic Disease; Obesity

Study Design

• Study Time Perspective: RETROSPECTIVE

Eligibility Criteria

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.

• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Chile

OTHER

Sponsor Role: collaborator

Marc Suhrcke

OTHER

Sponsor Role: lead

Responsible Party

Marc Suhrcke

Professor

Responsibility Role: SPONSOR_INVESTIGATOR

Principal Investigators

Marc Suhrcke, PhD

Role: PRINCIPAL_INVESTIGATOR

Centre for Health Economics, University of York

Ryota Nakamura, PhD

Role: PRINCIPAL_INVESTIGATOR

Centre for Health Economics, University of York

Andrew J Mirelman, PhD

Role: PRINCIPAL_INVESTIGATOR

Centre for Health Economics, University of York

Cristobal Cuadrado, MD, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Chile

Nicolas Silva, MD

Role: PRINCIPAL_INVESTIGATOR

University of Chile

References

Nakamura R, Mirelman AJ, Cuadrado C, Silva-Illanes N, Dunstan J, Suhrcke M. Evaluating the 2014 sugar-sweetened beverage tax in Chile: An observational study in urban areas. PLoS Med. 2018 Jul 3;15(7):e1002596. doi: 10.1371/journal.pmed.1002596. eCollection 2018 Jul.

Reference Type: DERIVED

PMID: 29969456 (View on PubMed)

Other Identifiers

MR/N026640/1

Identifier Type: -

Identifier Source: org_study_id