Price Changes and Nutrient Profiling Among Adult Grocery Shoppers

Study Overview
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Brief Summary
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The purpose of the research is to examine the association between price changes, nutrient profiling, and grocery food purchases among household grocery shoppers.

Detailed Description
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Participants will be asked to select a week's worth of groceries for their household from a virtual online grocery store. Shoppers will be randomly assigned to one of four conditions (control, nutrient profiling, price change, nutrient profiling and price change).

Official Title
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Price Changes and Nutrient Profiling Among Adult Grocery Shoppers

Conditions
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Nutrition, Food Purchases

Intervention / Treatment
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* Behavioral: Nutrient profiling
* Behavioral: Price Changes


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: primary household grocery shopper at least 19 years old one or more child (2-18yrs) living full time in the household Exclusion Criteria: not the primary household grocery shopper no dietary, medical, or psychopathology conditions that could interfere with the study under the age 19 no children (2-18yrs) living full time in the household

Ages Eligible for Study
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Minimum Age: 19 Years
Maximum Age: 80 Years

Sexes Eligible for Study
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Female

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Usual shopping<br>No change in condition. | |
| Experimental: Nutrient profiling<br>Nutrient profiling system will be present during shopping session. | Behavioral: Nutrient profiling<br>* Nutrient profiling system will be present during shopping session.<br>|
| Experimental: Price change<br>Price changes will be present during shopping session. | Behavioral: Price Changes<br>* Price changes will be present during shopping session.<br>|
| Experimental: Nutrient profiling and price change<br>Nutrient profiling system and price changes will be present during shopping session. | Behavioral: Nutrient profiling<br>* Nutrient profiling system will be present during shopping session.<br>Behavioral: Price Changes<br>* Price changes will be present during shopping session.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Nutritional Quality of Food Purchases | The Overall Nutrient Quality Index (ONQI) was used to assess nutritional quality of foods purchased. The ONQI is a 1 - 100 scale in which higher numbers indicate higher nutritional quality. Each food is given a score based on a ratio with positive health nutrients in the numerator and detrimental health nutrients in the denominator, based on a proprietary algorithm created by NuVal. The average ONQI score for all the groceries purchases was used as the outcome measure, of ONQI scores on a scale. | Participants were followed for one shopping session, an average of 2.5 hours |