An interventional study of Product placement intervention and Sham comparator in Diet Modification, sponsored by University Hospital Southampton NHS Foundation Trust. Completed. Open to female participants aged 18 Years to 45 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2018-05-08.
Sponsored by University Hospital Southampton NHS Foundation Trust · Not applicable, Interventional, and Prevention
This research project aims to help address a gap in understanding about the micro-environmental determinants of diet by exploring whether improving the placement of fresh and frozen fruit and vegetables and removing temptations of confectionary at checkouts in discount supermarkets influences the dietary behaviours of women aged 18-45 years and whether it is cost effective.
This study is a natural experiment with a prospective cluster controlled design. The intervention includes creating a new fresh fruit and vegetable section at the store entrance, placing frozen fruit and vegetable in the first aisle and removing confectionery from checkouts; it will be implemented continuously for 6 months in discount supermarkets.
The control condition is provision of a limited range of fresh fruit and vegetables, all placed at the back of the store, frozen vegetables in a middle aisle and confectionery sold at checkouts. Control and intervention stores will be located across England to improve generalizability of the sample. Each control store will be matched to an intervention store on i) sales profile, ii) customer profile and iii) neighbourhood deprivation (IMD deciles). Control stores will be located at least 50 miles from an intervention store to avoid contamination.
Women customers aged 18-45 years with a store loyalty card, who regularly shop at one of 3 intervention or 3 matched-control stores in England will be invited to participate. Women will be recruited via email, letter, SMS, shopping receipt note, Facebook advertisement, and in-store approach. Participants will contact the research team via text, email or Freephone and will be consented by phone after eligibility is assessed. Participants will be asked to complete four telephone surveys (baseline and 1, 3 and 6 months post intervention commencement) and will be offered 3x £10 Love2Shop vouchers that will be sent after completion of the baseline, 3 and 6 month surveys. A secure system to transfer store and participant loyalty card sales data has been established and confidentiality upheld through the use of study identification numbers.
Economic evaluation will be conducted from individual and retailer perspectives. Participant surveys will collect data about food expenditure, and travel costs to and from supermarkets that will be supplemented by loyalty card data. Refurbishment and ongoing costs, plus impact on sales will be estimated.
A process evaluation will be conducted to monitor intervention implementation (in-store surveys), mechanisms of impact (interviews with a sub-sample of supermarket staff and participants) and context (analysis of grocery shopping habits - location and frequency of different stores).
University Hospital Southampton NHS Foundation Trust is the lead sponsor of 147 studies on the registry; 36 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
The intervention includes 3 components: i) creation of a new fresh fruit and vegetable section at store entrance; ii) placing frozen fruit and vegetables in the first aisle and iii) removal of all cakes, confectionary and sugar sweetened beverages from checkouts (replaced with non-food items, fruit and bottled water).
Other: Product placement intervention
The control condition is provision of a limited range of fresh fruit and vegetables, all placed at the back of the store, frozen vegetables in a middle aisle and confectionery sold at checkouts.
Other: Sham comparator
The intervention includes 3 components: i) creation of a new fresh fruit and vegetable section and island in the first aisle; ii) placing frozen fruit and vegetables in the first aisle and iii) removal of all cakes, confectionary and sugar sweetened beverages from checkouts (replaced with non-food items, fruit and bottled water).
The control condition is provision of a limited range of fresh fruit and vegetables, all placed at the back of the store, frozen vegetables in a middle aisle and confectionery sold at checkouts.
Dietary quality score
The primary outcome is women's dietary quality measured using a 20-item food frequency questionnaire (FFQ) to create a standardised dietary quality score (validated against 100-item FFQ and red cell folate).
Time frame: 3 month follow-up post intervention commencement
Child's dietary quality score
Child's dietary quality will be collected using a validated FFQ for use with parents of children aged 2-6 years.
Time frame: 3 month follow-up post intervention commencement
Women's daily fruit and vegetable portions
Women's daily fruit and vegetable portions will be collected using a 2-item tool that has been validated against urinary potassium and plasma ascorbic acid to describe high (≥5 portions/day) and low (≤2.5 portions/day) intake.
Time frame: 3 month follow-up post intervention commencement
Women's weekly confectionery intake
Frequency per week that women consume sweets and chocolates
Time frame: 3 month follow-up post intervention commencement
Weekly sales of fresh fruit and vegetables
Total weekly sales of fresh fruit and vegetables collected via electronic sales data
Time frame: 12 week period following intervention commencement
Weekly sales of confectionery
Total weekly sales of confectionery collected via electronic sales data
Time frame: 12 week period following intervention commencement
No study locations are listed for this record.
This study is completed, as verified in Apr 2018. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
University Hospital Southampton NHS Foundation Trust