Objective
This study tested the efficacy of a multicomponent supermarket point-of-purchase (POP) intervention featuring in-person nutrition education on the nutrient composition of food purchases.
Design
The design was a randomized trial comparing the intervention to usual care (no treatment).
Setting
A supermarket in a socioeconomically diverse region of Phoenix, Arizona.
Participants
One-hundred fifty-three adult shoppers were recruited on-site.
Intervention
The intervention consisted of brief shopping education by a nutrition educator and an explanation and promotion of a supermarket POP healthy shopping program that included posted shelf signs identifying healthy foods, sample shopping lists, tips, and signage.
Main Outcome Measures
Outcomes included purchases of total, saturated, and trans fat (g/1000 kcals), and fruits, vegetables, and dark green and bright yellow vegetables (servings/1000 kcals) derived through nutritional analysis of participant shopping baskets.
Analysis
Analysis of covariance compared the intervention and control groups on food purchasing patterns while adjusting for household income.
Results
The intervention resulted in greater purchasing of fruit and green and yellow vegetables. No other group differences were observed.
Conclusions and Implications
Long-term evaluations of supermarket interventions should be conducted to improve the evidence base, and to determine the potential for impact on food choices associated with decreased chronic disease.