Women's Responses to Adjusted Product Placement and Its Effects on Diet - 2 (WRAPPED2)

University Hospital Southampton NHS Foundation Trust

Status: Unknown

Conditions: Diet Modification

Treatments: Other: Improved product placement of fresh fruit and vegetables; Other: Sham comparator

Study type: Interventional

Funder types: Other

Identifiers

NCT03573973

20986

Details and patient eligibility

About

This study is the largest supermarket trial internationally and will assess the effectiveness and cost-effectiveness of improving the placement of fresh fruit and vegetables in discount supermarkets in improving the fresh fruit and vegetable purchasing of women aged 18-45 years.

Full description

WRAPPED2 (Women's Responses to Adjusted Product Placement and its Effects on Diet - 2) is a natural experiment with a prospective matched controlled cluster design. The setting is a discount supermarket chain in the United Kingdom regularly used by disadvantaged families for their main shop. The intervention is a store refurbishment programme that involves creation of a new fresh fruit and vegetable section in the store entrance. Control stores keep the existing layout with a limited range of fresh fruit and vegetables and placement of fresh fruit and vegetables at the back of the store.

A total of 45 participants will be recruited from each of 18 intervention and 18 matched control stores through the retailer's loyalty card scheme (postal letter) and shop floor recruitment; these methods proved effective during the pilot. Participants will be women aged 18-45 years who shopped at a study store in the 12 weeks before recruitment. This study is unique in its collection of individual level sales data, as well as demographic and dietary information, and is the first to collect outcome data for more than one family member. Participant's weekly sales data will be obtained through the retailer's loyalty card scheme and will cover 3 months before refurbishment, plus 0-3 months and 3-6 months after. Change in women's fresh fruit and vegetable purchasing from baseline to 3 months is the primary outcome. Secondary outcome data about women's diets, their young child's diet (2-6 years), food shopping habits, perceptions of supermarket environment, and psychosocial and demographic characteristics will be collected by telephone survey before refurbishment, and 1, 3 and 6 months after. Weekly sales data for study stores will be provided by the retailer.

Cost-effectiveness will be assessed from individual, retailer and societal perspectives. Process evaluation will assess implementation, mechanisms of impact and context.

This study is politically and scientifically important being one of the first field studies of this kind. The findings could provide strong evidence for future public health policy interventions to help address inequalities in diet and non-communicable disease risk by supporting development of a healthy store layout that could be adopted more widely in food retail outlets.

Enrollment: 667 patients

Sex: Female

Ages: 18 to 45 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Women aged 18-60 years
• Hold a store loyalty card
• Shop regularly in a study store
• Shoppers who choose items in-store but opt for home delivery

Exclusion criteria

• Women under the age of 18 or over 60 years
• Males or children
• Irregular shopper or online-only shopper
• Do not hold store loyalty card

Trial design

Primary purpose: Prevention

Allocation: Non-Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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667 participants in 2 patient groups

Fresh fruit and vegetable placement intervention

Experimental group

Description:

The intervention is a store refurbishment programme that includes the creation of a new fresh fruit and vegetable section at the store entrance with expanded range thus improving the availability and position of fresh fruit and vegetables.

Treatment:

Other: Improved product placement of fresh fruit and vegetables

Control

Sham Comparator group

Description:

The control condition is the existing store layout with a limited range of fresh fruit and vegetables that are placed at the back of the store.

Treatment:

Other: Sham comparator