Clinical trial NCT05595551: Process and Effect Evaluation of the Project "Aan Tafel in 1,2,3 Euro"
Official title: Supporting Healthy and Sustainable Family Meals Among Parents With Lower Socioeconomic Status: Process and Effect Evaluation of the Project "Aan Tafel in 1,2,3 Euro"
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Consumer Behavior
Food Selection
Keywords: Health promotion
Nutrition intervention
Socioeconomic status
Family meals
Parents
Lead sponsor: University Ghent
Sponsor class: OTHER
First posted: 2022-10-27
Enrollment: 272
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NON_RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: The goal of this research project is to learn what the impact of the specific project "Aan Tafel in 1 2 3 euro" is on the food and meal habits of families of lower SES.

Three types of studies will be conducted:

WP1) Process evaluation via qualitative research: focus groups and/or individual interviews with participants of Aan Tafel in 1 2 3 euro, and with delegates of the social organizations;

WP2) Effect evaluation via secondary data-analysis of purchase data retrieved from loyalty cards of participants, and of general customers (i.e., control group);

WP3) Process and effect evaluation with a control group in a baseline-post design: the intervention group are participants of the program, and the control group are clients in social organizations, but do not participate in the program.

On the one hand we want to find out if the intervention has an effect on specific determinants (i.e., food literacy, self-efficacy, attitudes, food security) of food behavior/meal prepping behavior and on meal structure of the family (i.e., amount of freshly made meals, amount of meals cooked and consumed together) (WP3), as well as on participants' food choices (WP2). On the other hand we want to find out how participans experience the program, what succes factors and barriers are, as well as how social organizations experience the program (as a partner of Colruyt, and contact person of the vulnerable families) (WP1).

Detailed description: "Aan Tafel in 1 2 3 euro" is a project of retailer Colruyt in cooperation with social organizations in Belgium. The project/intervention was launched in 2016 and has been implemented throughout Belgium since. In 2021 about 8000 families have already been subscribed, and the numbers are still growing. Families with a lower SES (vulnerable families) are informed by a social organization (OCMW, CAW, kind \& gezin, etc.) and can voluntarily register for the project. When a family is registered, they receive a recipe booklet every two weeks at home. The booklet consists of six easy, child-friendly recipes with accompanying shopping lists. Recipes are targeted at three people and include fish, meat and veggie dishes. Each recipe is guaranteed to cost no more than one, two or three euros per serving. The participants are registered via the Xtra-card (loyalty card of Colruyt), so that the discount can be offered anonymously and discretely. Since the intervention is an already existing one, we made an overview of the intervention components, behavior change techniques and practical applications, based on the Intervention Mapping Theory (Kok et al., 2015) and the Behavior Change Wheel (Abraham \& Michie, 2008). Based on this overview, we determined goals and outcome measures for our research project.

In the qualitative study (WP1), participants of the intervention, as well as representatives of social organizations will be recruited to participate in an interview and/or focus group interview. Interviews will be conducted until data saturation is reached.

In the interventional study (WP3), participants of the project (intervention condition) will be compared to participants in a control condition who do not participate in the project. A total sample size of 200 participants is calculated, based on an a priori power analysis (two groups, two measurements, α=0.05; power=0.80, ES=0.25). Participants in both conditions will complete a survey in a pre-measurement and a post-measurement, three months after the start of the intervention.

The second effect study (WP2) has a longitudinal pre-post design, and is based on secondary purchase data from 2018 until 2022. The intervention group (i.e., participants of the intervention) will be compared to a control group (i.e., not subscribed in the intervention), by using general customer data. A multilevel growth model will be used to look at each individual's different purchase moments, with data before and during the intervention. The model represents three levels: 1) point of time/purchase, 2) customer, 3) store/location.

Eligibility criteria: Inclusion Criteria:

* Be registered for the project Aan Tafel in 1-2-3 euro
* Be a member of a family with at least one child under the age of 18 living at home.
* Being Dutch-speaking: thorough knowledge of Dutch in terms of reading/writing/speaking.
* Be over 18 years old and (regularly) responsible for the preparation of the family meals

Primary outcomes:
measure: Change in Food literacy
timeFrame: Change from baseline food literacy at 3 months
measure: Change in Self-efficacy for eating/cooking vegetables and fruits
timeFrame: Change from baseline self-efficacy at 3 months
measure: Change in Cooking attitude
timeFrame: Change from baseline attitudes at 3 months
measure: Change in Food security
timeFrame: Change from baseline food security at 3 months
measure: Change in Family meal time frequency
timeFrame: Change from baseline meal time frequency at 3 months
measure: Change in Meal preparation
timeFrame: Change from baseline meal preparation at 3 months
measure: Change in food purchases (WP2)
timeFrame: Change from amount of food purchases before the subscription into the project at the time after subscription
Secondary outcomes:
measure: Change in Reported eating behavior
timeFrame: Change from baseline reported eating behavior at 3 months
Other outcomes:
Locations:
city: Ghent
country: Belgium
facility: Ghent University
Study officials:
affiliation: University Ghent
name: Wendy Van Lippevelde
role: STUDY_DIRECTOR
References:
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