Skip to main content
OpenTrials
Completed

NCT Number: NCT06865157

Healthy Food Subsidy Project in Chile

Feasibility Study

Objective:

The objective of this feasibility study is to develop and evaluate the feasibility and acceptability of a healthy food subsidy program within the Chilean context. The program, called Healthy Wallet, is a smartphone app-based initiative aimed at incentivizing low-income families to purchase fruits and vegetables at open markets. The findings from this study are intended to inform and potentially accelerate the implementation of similar policies in other countries.

Methods:

This study assessed the feasibility of implementing the Healthy Wallet subsidy program, designed to promote healthy eating habits among low-income families. The program incentivized the purchase of fruits and vegetables at local ferias (open markets) and was delivered through a smartphone application. The research adopted a community-based approach, leveraging existing social support systems to identify eligible beneficiaries and streamline the distribution of benefits. Open markets served as redemption sites for the subsidies.

The study engaged 30 families and 8 vendors in an 8-week pilot program conducted from June to August 2024. Data collection included pre- and post-implementation surveys, as well as focus group discussions: three with participating families and one with vendors. These methods aimed to evaluate the app's effectiveness, user experience, and overall feasibility of the program. Insights from the study will guide recommendations for scaling the initiative to a national level and beyond.

Completed

Looking for future studies?

Notify Me

Key information

Conditions

Feasibility Studies Food Security

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Feria Libre Juan Pinto Durán

Santiago, Macul, 7830490, Chile

About this study

Study Design:

This study employed an eight-week feasibility approach (Healthy Wallet) utilizing a mixed-methods assessment. The quantitative component consisted of a pre-post single-arm study, while the qualitative component involved focus group discussions with both vendors and participants.

Intervention:

The Healthy Wallet program is a mobile-based initiative aimed at promoting healthy eating habits among low-income families by incentivizing the purchase of fruits and vegetables at open markets. The program provides a monthly electronic transfer of 16,000 CLP (approximately 17 USD) for each eligible household member, including children under 18, students under 25, and individuals with disabilities. The primary food purchaser in each household receives the transfer, which is exclusively redeemable at registered stalls in the open market.

To ensure seamless transactions, registered vendors display a distinctive Healthy Wallet identification sign with a unique code. Beneficiaries use the mobile application to view available funds and complete purchases by entering the vendor's stall code. A separate vendor application tracks sales and maintains transaction records for efficient invoicing.

Sample:

The program engaged 30 families, who received monthly benefits for two consecutive months to use at 6 participating stalls within the Juan Pinto Durán open market.

Eligibility Criteria:

Eligibility aligned with Chile's existing social protection framework, leveraging the Emergency Family Wallet government subsidy established to address rising food prices during the COVID-19 pandemic. Households that participated in the Emergency Family Wallet program (2023-2024) were eligible.

The designated household representative, responsible for receiving and managing the benefit, had to meet the following criteria:

Be at least 18 years old (legal age). Be a parent or guardian of a child aged 0-5 years. Be responsible for household grocery purchases. Vendors operating at the Juan Pinto Durán open market were excluded from household eligibility.

Subsidy Delivery Platform:

A private mobile application, originally developed for university food benefits, was adapted for this pilot program. A private company managed the entire process, including loading benefits into participants' accounts, facilitating their use at the Juan Pinto Durán open market, and ensuring payment to vendors. This company provided its services pro bono, offering technical expertise and logistical support at no cost.

Ethical Considerations:

The study was conducted in accordance with the Declaration of Helsinki. The protocol and informed consent forms were approved by the Ethics Committee of the Faculty of Medicine, University of Chile.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

Households that are beneficiaries of the Bolsillo Familiar Electrónico program in 2023-2024 and have children under 5 years of age.

Availability to shop at the local open-air market (feria libre).

Exclusion criteria

Individuals who are market vendors (feria vendors).

Treatment and study plan

Healthy Wallet

Other

The Healthy Wallet program is a mobile-based initiative designed to promote healthy eating among low-income families by incentivizing the purchase of fruits and vegetables at open markets. Over a two-month period, 30 families received monthly benefits to use at a designated open market.

Primary outcomes

  1. Percentage of the monetary subsidy spent daily by each household, based on the records from the subsidy delivery platform.

    Time frame: Daily throughout the two months of follow-up

    Percentage of the monetary subsidy spent daily by each household, based on the records from the subsidy delivery platform.

  2. Percentage of households that used the monetary subsidy at least once per month, based on the records from the subsidy delivery platform

    Time frame: Weekly throughout the two months of follow-up

    Percentage of households that used the monetary subsidy at least once per month, based on the records from the subsidy delivery platform

  3. Perceived utility of the subsidy program among beneficiaries, evaluated through online surveys

    Time frame: At the end of the study, at two months of follow-up

    Perceived utility of the subsidy program among beneficiaries, evaluated through online surveys (Likert scale)

  4. Perceived utility of the subsidy program among vendors, evaluated through online surveys

    Time frame: At the end of the study, at two months of follow-up

    Perceived utility of the subsidy program among vendors, evaluated through online surveys (Yes/No questionnaire)

  5. Self-reported satisfaction of the subsidy program among beneficiaries, evaluated through focus groups

    Time frame: At the end of the study, at two months of follow-up

    Self-reported satisfaction of the subsidy program among beneficiaries, evaluated through focus groups

  6. Self-reported satisfaction of the subsidy program among vendors, evaluated through focus groups

    Time frame: At the end of the study, at two months of follow-up

    Self-reported satisfaction of the subsidy program among vendors, evaluated through focus groups

  7. Perceived utility of the subsidy platform among beneficiaries, evaluated through online surveys

    Time frame: At the end of the study, at two months of follow-up

    Perceived utility of the subsidy program among beneficiaries, evaluated through online surveys (Likert scale)

  8. Perceived utility of the subsidy platform among vendors, evaluated through online surveys

    Time frame: At the end of the study, at two months of follow-up

    Perceived utility of the subsidy program among vendors, evaluated through online surveys (Yes/No questionnaire)

  9. Self-reported satisfaction of the subsidy platform among beneficiaries, evaluated through focus groups

    Time frame: At the end of the study, at two months of follow-up

    Self-reported satisfaction of the subsidy platform among beneficiaries, evaluated through focus groups

  10. Self-reported satisfaction of the subsidy platform among vendors, evaluated through focus groups

    Time frame: At the end of the study, at two months of follow-up

    Self-reported satisfaction of the subsidy platform among vendors, evaluated through focus groups

Other outcomes

  1. Self-reported monthly expenditure on all fruits purchased from the open market, based on a questionnaire

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    Self-reported monthly expenditure on all fruits purchased from the open market, based on a questionnaire

  2. Self-reported monthly expenditure on all vegetables purchased at the open market, based on a questionnaire

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    Self-reported monthly expenditure on all vegetables purchased at the open market based on a questionnaire

  3. Self-reported monthly expenditure on all fruits and vegetables combined, purchased from the open market, based on a questionnaire

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    Self-reported monthly expenditure on all fruits and vegetables combined, purchased from the open market, based on a questionnaire

  4. Self-reported monthly combined fruit and vegetable purchases (in kilograms) from the open market, based on a questionnaire

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    Self-reported monthly combined fruit and vegetable purchases (in kilograms) from the open market, based on a questionnaire

  5. Self-reported monthly fruit purchases (in kilograms) at the open market, based on a questionnaire

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    Self-reported monthly fruit purchases (in kilograms) at the open market, based on a questionnaire

  6. Self-reported monthly vegetable purchases (in kilograms) at the open market, based on a questionnaire

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    Self-reported monthly vegetable purchases (in kilograms) at the open market, based on a questionnaire

  7. Self-reported monthly vegetable purchases (in units) at the open market, based on a questionnaire

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    Self-reported monthly vegetable purchases (in units) at the open market, based on a questionnaire

  8. The Global Dietary Recommendations (GDR) score from the Diet Quality Questionnaire (DQQ), range 0-18

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    The Global Dietary Recommendations (GDR) score is a score with a range from 0 to 18 that indicates adherence to global dietary recommendations, which include dietary factors protective against non-communicable diseases (NCD). The higher the GDR score, the more recommendations are likely to be met. The GDR score is based on food group consumption during the past day and night. The GDR score is calculated as follows: NCD-Protect - NCD-Risk + 9 = GDR score It is expressed as the average score for the population.

  9. The Non-Communicable Disease-protect (NCD-protect) score from the Diet Quality Questionnaire (DQQ), range 0-9

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    An indicator of dietary factors protective against non-communicable diseases (NCD) (articulated by the World Health Organization):

    • At least 400g of fruits and vegetables per day
    • Whole grains, pulses, and nuts or seeds
    • At least 25g of fiber per day The NCD-Protect score is a score with a range from 0 to 9. It is a sub-component of theGDR score, and reflects adherence to global dietary recommendations on healthy components of the diet. The NCD-Protect score is based on food consumption from 9 healthy food groups during the past day and night. A higher score indicates inclusion of more health-promoting foods in the diet, and correlates positively with meeting global dietary recommendations. It is expressed as the average score for the population.

  10. The Non-Communicable Disease-risk (NCD-risk) score from the Diet Quality Questionnaire (DQQ), range 0-9

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    An indicator of dietary factors for Non-Communicable Diseases (NCD): Less than 10% (ideally less than 5%) of total energy from free sugars; Less than 10% of total energy from saturated fat, and less than 30% from total fat; Less than 5g of salt per day; Little if any processed meat, and red meat limited to no more than 350-500g per week. It is a score with a range from 0 to 9. It is a sub-component of the GDR score, and reflects adherence to global dietary recommendations on components of the diet to limit or avoid. A higher score indicates higher consumption of foods and drinks to avoid or limit, and correlates negatively with meeting global dietary recommendations. The NCD-Risk score is based on food consumption from 8 food groups to limit or avoid during the past day and night (one food group, processed meat, is double weighted). This is a negative indicator, and is expressed as the average score for the population.

  11. The Food Group Diversity Score (FGDS) from the Diet Quality Questionnaire (DQQ), range 0-10

    Time frame: At baseline and at the end of the study (0 and 2 months of follow-up)

    The Food group diversity score (FGDS) is a semicontinuous score ranging from 0 to 10, by summing the scores for each food group (0: not consumed; 1: consumed) using the following 10 food groups: 1) grains, white roots and tubers, and plantains; 2) pulses (beans, peas, and lentils); 3) nuts and seeds; 4) milk and milk products; 5) meat, poultry, and fish; 6) eggs; 7) dark green leafy vegetables; 8) other vitamin A-rich fruits and vegetables; 9) other vegetables; and 10) other fruits. The FGDS is a proxy indicator of micronutrient adequacy for the general population expressed as the mean population score.

Sponsors and collaborators

Lead sponsor

University of Chile

Other

Collaborators

  • Bloomberg Philanthropies

Registry information

Official study title

Bolsillo Saludable: Feasibility of a Healthy Food Subsidy on Healthy Eating in Low-Income Households in Chile

Important dates

Study start
2024
Primary completion
2024
Study completion
2024
First posted
Mar 7, 2025
Registry last updated
Mar 7, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Related clinical trials

Published trials that share one or more normalized conditions with this study.