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Trial registered on ANZCTR


Registration number
ACTRN12620000097943
Ethics application status
Approved
Date submitted
19/12/2019
Date registered
4/02/2020
Date last updated
4/02/2020
Date data sharing statement initially provided
4/02/2020
Date results provided
4/02/2020
Type of registration
Retrospectively registered

Titles & IDs
Public title
A social media nutrition promotion program to improve calcium intakes in young adults
Scientific title
Assessing Calcium Knowledge and Intake in Young Adults Via Social Media and Text Messages: Randomized Controlled Trial
Secondary ID [1] 300144 0
None
Universal Trial Number (UTN)
U1111-1245-7143
Trial acronym
CAN-Do: CAlcium Nutrition-Dietary Opportunities
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Calcium intake 315674 0
Condition category
Condition code
Diet and Nutrition 313963 313963 0 0
Other diet and nutrition disorders
Public Health 314304 314304 0 0
Health promotion/education

Intervention/exposure
Study type
Interventional
Description of intervention(s) / exposure
The 3 arm RCT included two intervention groups (Facebook and Facebook plus text) and one control group. For the Facebook group, educational (educating on calcium-containing food sources and recommended serves) and motivational posts (reminded participants about setting
goals and tracking progress for habit formation, tips for including more calcium) together with cooking videos (recipe videos that provided instructions on how to incorporate calcium in main meals and snacks) were delivered every second day for six weeks. An infographic was used to inform participants of the recommendations and set as the cover photo. The design of these posts applied the COM-B model of behaviour change.

For the Facebook plus text group, on the alternate days when Facebook contact was not delivered, text messages that asked them to set goals, prompted them to engage with the Facebook content and progress their goals. Social support was provided via 2-way text messaging.
The duration was six weeks and the intervention was delivered remotely by a dietitian to the Australian community of young adults. The daily usage was at the participant’s discretion. The location was to the persons Facebook account or mobile phone (for those receiving text messages). Fidelity was assessed by number of replies to text messages and views of Facebook posts
Intervention code [1] 316413 0
Lifestyle
Intervention code [2] 316414 0
Treatment: Other
Intervention code [3] 316687 0
Behaviour
Comparator / control treatment
Participants in the control group were emailed once with an e-leaflet on calcium and did not receive any continued support on social media. The e-leaflet was created specifically for this study by the research team.
Control group
Active

Outcomes
Primary outcome [1] 322366 0
Change in calcium intake
Self-report questionnaire was adapted from Pasco et al 2000
Timepoint [1] 322366 0
Measured at baseline and after 6 weeks
Secondary outcome [1] 378235 0
The secondary outcomes measured the impact of the intervention on determinants of calcium intake which included knowledge of calcium recommendations and serve sizes, self-efficacy, motivation for consuming calcium-rich foods and habit formation.

1) Knowledge was assessed by participant’s ability to identify sources of calcium, a correct serve of calcium and stating the calcium requirements for their age group using a researcher-designed questionnaire as no validated questionnaire could be found.
Timepoint [1] 378235 0
Measured at baseline and after 6 weeks
Secondary outcome [2] 378956 0
2) A Five Item Likert Scale questionnaire previously validated for other dietary behaviours was adapted to measure self-efficacy for improving calcium-rich food consumption from Ma et al 2002.
Timepoint [2] 378956 0
Measured at baseline and after 6 weeks
Secondary outcome [3] 378957 0
3) Autonomous and controlled motivation for consumption of calcium was measured using a Self-Regulation Questionnaire adapted from Coa et al 2016 and Levesque et al 2007.
Timepoint [3] 378957 0
Measured at baseline and after 6 weeks
Secondary outcome [4] 378958 0
4) Habit formation for calcium intake was measured using the validated Four Item Seven Point Scale Self-Report Behavioural Automaticity Index which was adapted from Gardner et al 2012
Timepoint [4] 378958 0
Measured at baseline and after 6 weeks

Eligibility
Key inclusion criteria
Anyone aged 18 to 25 years and owning a Facebook account and smartphone
Minimum age
18 Years
Maximum age
25 Years
Sex
Both males and females
Can healthy volunteers participate?
Yes
Key exclusion criteria
Anyone who completed a nutrition course or currently undertaking a nutrition course on the basis of their high existing level of nutrition knowledge. Additionally, any participants with a food allergy, known lactose intolerance or currently taking calcium supplements (but not multivitamins) or eating disorders was excluded.

Study design
Purpose of the study
Prevention
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Allocation involved contacting the holder of the allocation schedule who was “off-site” or at central administration site- the randomisation was performed by two independent researchers who were not study investigators.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple randomisation using a randomisation table created by computer software (i.e. computerised sequence generation)- a randomised sequence generation was used to allocate the participants.
Masking / blinding
Open (masking not used)
Who is / are masked / blinded?



Intervention assignment
Parallel
Other design features
3 arm RCT- two intervention groups and one control group
Phase
Not Applicable
Type of endpoint/s
Efficacy
Statistical methods / analysis
This was a three-arm parallel trial with a 1:1:1 allocation ratio. The three groups were Facebook intervention (Facebook); Facebook intervention plus text messages (Facebook plus text); and e-leaflet containing information on calcium intake (Control). Sample size was determined using GPower a statistical power analysis software. To detect a mean difference of 125 mg calcium intake with P= 0.05 and 90% power assuming a standard deviation of 259 mg, a sample size of 45 was required per arm and increased to 75 to allow for 40% drop out.

To account for all participants, an intention to treat analysis with multiple imputations for missing values was used. This meant that all participants who were randomised at the start of the trial were retained for analyses. Due to the large amount of missing data, 10 imputed datasets were created based on gender, SEIFA (Socioeconomic Index), cooking frequency per week and baseline intake of primary (milk and calcium intake) and secondary outcomes (knowledge, self-efficacy, motivation and habit) using Stata version 13.1.
The primary outcome of change in milk intake, which was categorical in number of cups, was compared between three groups using a logistic regression model adjusted for gender, SEIFA, cooking frequency, baseline calcium (non-milk) baseline knowledge, baseline self-efficacy, baseline motivation and baseline habit. The quantitative values for change in calcium intake from other dietary sources were compared using linear regression as were the variables for the secondary outcomes of knowledge score, self-efficacy for change score, motivation and habit score adjusted for gender, SEIFA, cooking frequency, baseline calcium intake, baseline knowledge, self-efficacy, motivation and habit. The distribution of missing outcome data at both time points was investigated using counts and percentages across all sociodemographic variables. Furthermore, separate general estimating equation (GEEs) models for binary data were used to investigate any relationships between sociodemographic variables and missingness in each outcome, adjusting for other sociodemographic variables.

Recruitment
Recruitment status
Completed
Date of first participant enrolment
Anticipated
Actual
15/01/2019
Date of last participant enrolment
Anticipated
Actual
31/03/2019
Date of last data collection
Anticipated
Actual
9/05/2019
Sample size
Target
225
Accrual to date
Final
211
Recruitment in Australia
Recruitment state(s)
NSW,QLD,WA,VIC

Funding & Sponsors
Funding source category [1] 304579 0
University
Name [1] 304579 0
The University of Sydney
Country [1] 304579 0
Australia
Primary sponsor type
University
Name
The University of Sydney
Address
The University of Sydney
Camperdown 2006
NSW Australia
Country
Australia
Secondary sponsor category [1] 305049 0
None
Name [1] 305049 0
Address [1] 305049 0
Country [1] 305049 0

Ethics approval
Ethics application status
Approved
Ethics committee name [1] 305005 0
The University of Sydney Human Research Ethics Committee, The University of Sydney HREC 1
Ethics committee address [1] 305005 0
Ethics committee country [1] 305005 0
Australia
Date submitted for ethics approval [1] 305005 0
02/07/2018
Approval date [1] 305005 0
24/08/2018
Ethics approval number [1] 305005 0
2018/597

Summary
Brief summary
Trial website
Trial related presentations / publications
Public notes

Contacts
Principal investigator
Name 98938 0
Ms Anika Rouf
Address 98938 0
Level 4 East, Charles Perkins Centre
The University of Sydney
Camperdown
NSW 2006
Country 98938 0
Australia
Phone 98938 0
+61 2 8627 4704
Fax 98938 0
+61 2 8627 1605
Email 98938 0
arou9270@uni.sydney.edu.au
Contact person for public queries
Name 98939 0
Margaret Allman-Farinelli
Address 98939 0
Level 4 East, Charles Perkins Centre
The University of Sydney
Camperdown
NSW 2006
Country 98939 0
Australia
Phone 98939 0
+61 2 9036 7045
Fax 98939 0
+61 2 8627 1605
Email 98939 0
margaret.allman-farinelli@sydney.edu.au
Contact person for scientific queries
Name 98940 0
Anika Rouf
Address 98940 0
Level 4 East, Charles Perkins Centre
The University of Sydney
Camperdown
NSW 2006
Country 98940 0
Australia
Phone 98940 0
+61 2 8627 4704
Fax 98940 0
+61 2 8627 1605
Email 98940 0
arou9270@uni.sydney.edu.au

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
No/undecided IPD sharing reason/comment
Data sharing was not approved in ethics


What supporting documents are/will be available?

No Supporting Document Provided



Results publications and other study-related documents

Documents added manually
No documents have been uploaded by study researchers.

Documents added automatically
SourceTitleYear of PublicationDOI
EmbaseImproving Calcium Knowledge and Intake in Young Adults Via Social Media and Text Messages: Randomized Controlled Trial.2020https://dx.doi.org/10.2196/16499
N.B. These documents automatically identified may not have been verified by the study sponsor.