Condition category
Nutritional, Metabolic, Endocrine
Date applied
04/05/2018
Date assigned
11/06/2018
Last edited
11/06/2018
Prospective/Retrospective
Retrospectively registered
Overall trial status
Ongoing
Recruitment status
Recruiting

Plain English Summary

Background and study aims
Our environments shape our behaviour, however little research has assessed whether healthier food cues have a similar impact to less healthy ones. Findings from a recent online study indicated that increasing the number of less healthy snack foods available may have a larger impact on food selection than increasing healthier foods. The aim of this study is to examine whether the availability of healthier vs. less healthy food alters the likelihood of selecting a healthier or less healthy snack for immediate consumption, and to determine if food selection is affected by individuals’ socioeconomic status, response inhibition and food appeal.

Who can participate?
Adults over the age of 18 who are able to attend a face-to-face study session in Cambridge, UK

What does the study involve?
Participants are randomly allocated to one of three groups (which vary in terms of the number of healthier vs less healthy foods they are offered). Participants in each group are offered a selection of snack foods, with the available snacks comprising a mix of healthier and less healthy snacks. Participants are asked to select one snack and are asked to consume the entire snack. Participants are also asked to complete measures of response inhibition and food appeal on a laptop at the start of a study, and questions measuring demographic variables after consuming the snacks.

What are the possible benefits and risks of participating?
Participants will be paid £30 for participating in this study. There are no known risks of participating in the study.

Where is the study run from?
Behaviour and Health Research Unit, University of Cambridge (UK)

When is the study starting and how long is it expected to run for?
February 2018 to December 2019

Who is funding the study?
1. Wellcome Trust (UK)
2. National Institute for Health Research Policy Research Programme (UK)

Who is the main contact?
Dr Rachel Pechey

Trial website

Contact information

Type

Scientific

Primary contact

Dr Rachel Pechey

ORCID ID

Contact details

University of Cambridge
Institute of Public Health
Forvie Site
Cambridge
CB2 0SR
United Kingdom

Additional identifiers

EudraCT number

ClinicalTrials.gov number

Protocol/serial number

RG77630

Study information

Scientific title

Impact of increasing the availability of healthier vs. less healthy food on food selection: a laboratory experiment

Acronym

Study hypothesis

1. Increasing the number of less healthy food items will have a larger effect on food selection than increasing the number of healthier food items
2.1. Participants with higher socioeconomic status will be more likely to choose healthier foods after seeing a greater number of healthier food options than those with lower socioeconomic status
2.2. Participants with higher socioeconomic status will be less likely to choose less healthy foods after seeing a greater number of less healthy food options than those with lower socioeconomic status
3. Response inhibition and food appeal will both partially mediate the impact of socioeconomic status on food selection

Ethics approval

Cambridge Psychology Research Ethics Committee, 28/03/2018, ref: Pre.2018.025

Study design

Single-centre three-group between-subjects design

Primary study design

Interventional

Secondary study design

Randomised parallel trial

Trial setting

Other

Trial type

Other

Patient information sheet

Not available in web format, please use the contact details to request a patient information sheet

Condition

Unhealthy diet

Intervention

Participants are randomly allocated into three groups, which vary in terms of the mix of healthier and less healthy foods offered:
Group 1: Snack selection contains 2 healthier and 2 less healthy foods.
Group 2: Snack selection contains 6 healthier and 2 less healthy foods.
Group 3: Snack selection contains 2 healthier and 6 less healthy foods.

Participants are told they will be taking part in a study investigating the effect of snacking on performance in cognitive tasks so that snack food can be consumed without making participants aware that the study is about snack selection (awareness of this may affect their snack selection). Participants are fully debriefed at the end of the session.

Participants are asked to select one snack and will be asked to consume the entire snack. Participants are also asked to complete implicit measures of response inhibition and food appeal on a laptop at the start of a study, and questions measuring demographic variables after consuming the snacks.

Intervention type

Behavioural

Phase

Drug names

Primary outcome measure

Selection of healthier or less healthy snack item from the available array

Secondary outcome measures

N/A

Overall trial start date

01/02/2018

Overall trial end date

31/12/2019

Reason abandoned (if study stopped)

Eligibility

Participant inclusion criteria

1. Adults aged over 18 years
2. Participants currently residing within the UK and able to attend a face-to-face study session in Cambridge

Participant type

Healthy volunteer

Age group

Adult

Gender

Both

Target number of participants

414

Participant exclusion criteria

Any food allergies or intolerances

Recruitment start date

26/04/2018

Recruitment end date

30/11/2018

Locations

Countries of recruitment

United Kingdom

Trial participating centre

Behaviour and Health Research Unit
University of Cambridge Institute of Public Health
Cambridge
CB2 0SR
United Kingdom

Sponsor information

Organisation

University of Cambridge (UK)

Sponsor details

Trinity Lane
Cambridge
CB2 1TN
United Kingdom

Sponsor type

University/education

Website

Funders

Funder type

Research organisation

Funder name

Wellcome Trust

Alternative name(s)

Wellcome

Funding Body Type

private sector organisation

Funding Body Subtype

international

Location

United Kingdom

Funder name

National Institute for Health Research

Alternative name(s)

NIHR

Funding Body Type

government organisation

Funding Body Subtype

Federal/National Government

Location

United Kingdom

Results and Publications

Publication and dissemination plan

1. Planned submission of the main results of this study for publication in a peer-reviewed journal
2. Dissemination of the results to the public, policy makers and other researchers through targeted social media

IPD sharing statement
The data sharing plans for the current study are unknown and will be made available at a later date.

Intention to publish date

30/06/2019

Participant level data

To be made available at a later date

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes