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

Obesity Clinical Trial

Official title:

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

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02926001
• Other study ID #: MR/N026640/1
• Status: Completed
• Phase: N/A
• First received: October 4, 2016
• Last updated: October 5, 2016
• Start date: October 2011
• Est. completion date: September 2015

Study information

• Verified date: October 2016
• Source: University of York
• Contact: n/a
• Is FDA regulated: No
• Health authority: United Kingdom: Research Councils UKChile: Comisión Nacional de Investigación Científica y Tecnológica
• Study type: Observational

Clinical Trial 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 2836
• Est. completion date: September 2015
• Est. primary completion date: September 2015
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: N/A and older

Eligibility

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.

Study Design

Time Perspective: Retrospective

Related Conditions & MeSH terms

• Chronic Disease
• Obesity

Locations

Country	Name	City	State
n/a

Sponsors (2)

Lead Sponsor	Collaborator
Marc Suhrcke	University of Chile

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Volume of sugar-sweetened beverage purchased		October 2011 - September 2015	No
Secondary	Consumer shopping patterns - Frequency	Frequency of Purchasing	October 2011 - September 2015	No
Secondary	Consumer shopping patterns - Volume	Volume of Purchases	October 2011 - September 2015	No
Secondary	Market price of sugar-sweetened beverages		October 2011 - September 2015	No
Secondary	Body mass index of household members		October 2011 - September 2015	No