A process evaluation of the Supermarket Healthy Eating for Life (SHELf) randomized controlled trial

The International Journal of Behavioral Nutrition and Physical Activity
Dana Lee OlstadDavid Crawford

Abstract

Supermarket Healthy Eating for Life (SHELf) was a randomized controlled trial that operationalized a socioecological approach to population-level dietary behaviour change in a real-world supermarket setting. SHELf tested the impact of individual (skill-building), environmental (20% price reductions), and combined (skill-building + 20% price reductions) interventions on women's purchasing and consumption of fruits, vegetables, low-calorie carbonated beverages and water. This process evaluation investigated the reach, effectiveness, implementation, and maintenance of the SHELf interventions. RE-AIM provided a conceptual framework to examine the processes underlying the impact of the interventions using data from participant surveys and objective sales data collected at baseline, post-intervention (3 months) and 6-months post-intervention. Fisher's exact, χ (2) and t-tests assessed differences in quantitative survey responses among groups. Adjusted linear regression examined the impact of self-reported intervention dose on food purchasing and consumption outcomes. Thematic analysis identified key themes within qualitative survey responses. Reach of the SHELf interventions to disadvantaged groups, and beyond study participants them...Continue Reading

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Citations

Jun 14, 2019·The Cochrane Database of Systematic Reviews·Peter von PhilipsbornEva Rehfuess
Oct 9, 2019·Nutrition & Dietetics : the Journal of the Dietitians Association of Australia·Vivien YiiSue Kleve
Aug 10, 2019·Obesity Reviews : an Official Journal of the International Association for the Study of Obesity·Miranda R BlakeAnna Peeters
Feb 1, 2019·The International Journal of Behavioral Nutrition and Physical Activity·Christina VogelJanis Baird
Aug 27, 2017·The International Journal of Behavioral Nutrition and Physical Activity·Dana Lee OlstadKylie Ball
Sep 17, 2017·BMC Public Health·Camila Tiome BabaGrace Angélica de Oliveira Gomes
Mar 14, 2021·The International Journal of Behavioral Nutrition and Physical Activity·Miranda R BlakeAdrian J Cameron
Sep 12, 2020·Evaluation and Program Planning·Elaine Yee-Sing WongJonine Jancey

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Methods Mentioned

BETA
chips

Software Mentioned

Stata
SHELf
NVivo
AIM
RE

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