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Trial registered on ANZCTR

Registration number
Ethics application status
Submitted, not yet approved
Date submitted
Date registered
Date last updated
Date data sharing statement initially provided
Type of registration
Prospectively registered

Titles & IDs
Public title
Efficacy of a brief internet-based intervention designed to target harmful dieting behaviors
Scientific title
Randomized controlled trial of a brief internet-based intervention for reducing extreme dietary restraint: Effects on binge eating behavior.
Secondary ID [1] 299462 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Eating disorders 314679 0
Condition category
Condition code
Mental Health 313025 313025 0 0
Eating disorders

Study type
Description of intervention(s) / exposure
The brief internet-based intervention is designed to target extreme dietary restraint, the best replicated risk and maintaining factor for binge eating.
The intervention is composed of 4 sessions. The 4 different sessions include:
1. Psycho-education: information on what dieting means, when it can become harmful, and why it can promote binge eating.
2. Self-monitoring: the importance of monitoring behaviors, thoughts, and emotions related to food, eating, and dieting
3. Regular eating: participants taught how to adopt a pattern of regular, flexible eating approach.
4. Food exposure: participants are taught how to overcome fear and anxiety around "forbidden" foods.

Each session will take around 30-60 minutes to complete, and participants will be encouraged to practice the strategies taught in each session on a daily basis. Therefore, total time commitment will vary from person to person. Participants will be encouraged to stay on each session for around 7 days prior to moving to the next session, although they will be instructed that they can go at a pace that suits themselves.

Each session will include: interactive videos discussing the content of the session and how to implement the prescribed strategies; written text; downloadable handouts to complete the prescribed activities; and quizzes designed to consolidate learning.

To monitor adherence, google analytics will be set up to examine the number of times a page was viewed and how long each page was viewed for.
Intervention code [1] 315713 0
Comparator / control treatment
The control group will be encouraged to look through a free open access website ( for general information and psycho-education on binge eating problems. This is designed to be a more active control group than a pure wait-list.
After the 4 week intervention phase, participants allocated to the control group will then have access to the internet intervention.
Control group

Primary outcome [1] 321577 0
Number of binge eating episodes over the past 28 days.
This will be assessed via a single item (item number 14) from the widely used Eating Disorder Examination Questionnaire (Fairburn & Beglin, 1994).
Timepoint [1] 321577 0
post-test (4 weeks from baseline)
Primary outcome [2] 321578 0
EDE-Q dietary restraint subscale
Timepoint [2] 321578 0
Post-test (4 weeks post-baseline)
Secondary outcome [1] 375419 0
EDE-Q global scores
Timepoint [1] 375419 0
post-test (4 weeks post-baseline)
Secondary outcome [2] 375420 0
Clinical Impairment assessment scores
Timepoint [2] 375420 0
post-test (4 weeks post-baseline)
Secondary outcome [3] 375421 0
Inflexible eating questionnaire scores
Timepoint [3] 375421 0
post-test (4 weeks post-baseline)
Secondary outcome [4] 375422 0
Dichotomous thinking in eating disorder scale - eating subscale scores
Timepoint [4] 375422 0
post-test (4 weeks post-baseline)
Secondary outcome [5] 375423 0
PHQ-4 total scores
Timepoint [5] 375423 0
post-test (4 weeks post-baseline)
Secondary outcome [6] 375424 0
Disihibition subscale from the TFEQ
Timepoint [6] 375424 0
post-test (4 weeks post-baseline)

Key inclusion criteria
Inclusion criteria is deliberately kept broad so that we can target the full spectrum of problem eating behaviors.. It includes:
a) Male or female adults ( > 17 years)
b) Who want to improve their eating patterns
c) Who have access to the internet
Minimum age
18 Years
Maximum age
No limit
Both males and females
Can healthy volunteers participate?
Key exclusion criteria

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Masking / blinding
Who is / are masked / blinded?

Intervention assignment
Other design features
Not Applicable
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Not yet recruiting
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)

Funding & Sponsors
Funding source category [1] 303962 0
Name [1] 303962 0
Deakin University
Address [1] 303962 0
221 Burwood Hwy, Burwood VIC 3125
Country [1] 303962 0
Primary sponsor type
Deakin University
221 Burwood Highway, Burwood, Vic, 3125
Secondary sponsor category [1] 304131 0
Name [1] 304131 0
Address [1] 304131 0
Country [1] 304131 0

Ethics approval
Ethics application status
Submitted, not yet approved
Ethics committee name [1] 304463 0
Deakin Research Ethics Committee
Ethics committee address [1] 304463 0
Melbourne Burwood Campus, 221 Burwood Highway, Burwood, VIC 3125, Australia
Ethics committee country [1] 304463 0
Date submitted for ethics approval [1] 304463 0
Approval date [1] 304463 0
Ethics approval number [1] 304463 0

Brief summary
Dietary restraint is one of the most potent risk factors for binge eating. Therefore, this study will examine whether dietary restraint can be addressed through a brief internet-based intervention. It is hypothesized that participants allocated to the online intervention will experience significantly greater reductions in binge eating behaviour and dietary restraint scores at post-test than participants allocated to the control group.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 97030 0
Dr Jake Linardon
Address 97030 0
Deakin University
221 Burwood Highway, Burwood, Victoria 3125
Country 97030 0
Phone 97030 0
+61 3 924 46308
Fax 97030 0
Email 97030 0
Contact person for public queries
Name 97031 0
Dr Jake Linardon
Address 97031 0
Deakin University
221 Burwood Highway, Burwood, Victoria 3125
Country 97031 0
Phone 97031 0
+61 3 924 46308
Fax 97031 0
Email 97031 0
Contact person for scientific queries
Name 97032 0
Dr Jake Linardon
Address 97032 0
Deakin University
221 Burwood Highway, Burwood, Victoria 3125
Country 97032 0
Phone 97032 0
+61 3 924 46308
Fax 97032 0
Email 97032 0

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No/undecided IPD sharing reason/comment
We have not applied for ethical approval to share IPD data.
What supporting documents are/will be available?
No other documents available
Summary results
No Results