Trial registered on ANZCTR

Trial ID
Ethics application status
Date submitted
Date registered
Type of registration
Retrospectively registered

Titles & IDs
Public title
Helping women with young children meet their physical activity goals: a randomised, controlled trial of a personalised program delivered by mobile telephone text messaging
Study title in 'Participant- Intervention- Comparator- Outcome (PICO)' format
MobileMums: evaluating the effects of a personalised program delivered by mobile telephone text messaging on the physical activity levels of women with young children compared with a usual care control
Secondary ID 252889 0
Universal Trial Number (UTN)
Trial acronym

Health condition
Health condition(s) or problem(s) studied:
Prevention of cardiovascular disease 258421 0
Condition category
Condition code
Public Health 258588 258588 0 0
Health promotion/education
Cardiovascular 265953 265953 0 0
Other cardiovascular diseases

Study type
Description of intervention(s) / exposure
MobileMums begins with a one-on-one face-to-face goal-setting session with an exercise counsellor (lasting approximately 45 minutes), and is then followed by a 12-week personalised SMS program (4 to 6 SMS per week) with a brief follow-up telephone consultation with her assigned counsellor at 6 weeks. The text messages emphasise cognitive-behavioural skills such as self-efficacy, use of social support networks, and self-reward. The SMS are tailored based on the woman's exercise goal, outcome expectancies, rewards, and also promote mum-friendly exercise opportunities in her neighbourhood. A support person nominated by the participant during the goal-setting session also receives 3 SMS per week for the duration of the program with tips on how to support the participant to reach her exercise goal.
Intervention code 257418 0
Intervention code 257419 0
Intervention code 257420 0
Comparator / control treatment
Usual care control participants receive print materials on physical activity at baseline only, and access to the program website which includes information on physical activity for mums, a forum and an exercise directory. The website will be available to participants until the end of the trial.
Control group

Primary outcome 259436 0
Weekly duration of moderate to vigorous physical activity as measured by the Actigraph GT1M activity monitor and walking for exercise (minutes per week) as measured by the Australian Women's Activity Survey
Timepoint 259436 0
Baseline, immediately post intervention and 6 months post-intervention
Primary outcome 259437 0
Program viability and fidelity: All participants recall, use and satisfaction with the program will be assessed using self-report items developed and used previously by the investigators. Responses to program SMS will also be monitored.
Timepoint 259437 0
immediately post-intervention
Primary outcome 259438 0
Cost-effectiveness: Costs incurred through program delivery, text messages, and staff costs will be monitored. Participants will also answer questions relating to use of health care services and any other costs associated with taking up physical activity. Participants will also complete the SF-12 Health Survey.
Timepoint 259438 0
Monitoring of spending throughout program delivery.

Interview and self-complete data will be collected at baseline, immediately post-intervention and 6 months post-intervention
Secondary outcome 265986 0
Because the intervention targets constructs of Social Cognitive Theory, the following constructs will be measured: physical activity self-efficacy; social support; outcome expectancy; goal setting skills;and perceived environmental opportunity for physical activity. These constructs will be measured via self-report items as a part of a self-complete questionnaire which have been developed and used previously by the research team, and have shown good measurement properties.
Timepoint 265986 0
Baseline, immediately post intervention and 6 months post-intervention

Key inclusion criteria
To be eligible, women must:
1. Have at least one child 5 years old or under (but older than 6 weeks)
2. Live within a 31km radius of Caboolture, Queensland
3. Own a mobile telephone
4. Be able to read and understand English
Minimum age
No limit
Maximum age
No limit
Can healthy volunteers participate?
Key exclusion criteria
Women will be excluded if they:
1. Have received doctor's advice not to exercise
2. Are currently pregnant

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Following a telephone screening, consenting and eligible participants are allocated a participant ID and complete their baseline assessment. Participant IDs are linked to treatment allocation in a separate spreadsheet, which is not revealed until completion of the baseline assessment when participants are either assigned to an exercise counsellor or are sent an information pack if they are in the control group.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Particpants will be randomised to one of two groups: control or intervention. Stratified allocation will be employed based on participants' baseline physical activity levels. Participants will be classified into one of three groups: no physical activity, some physical activity, or sufficient physical activity. For these three groups a randomisation list will be created using the R software package using random permuted blocks.
Masking / blinding
Who is / are masked / blinded?

Intervention assignment
Other design features
Not Applicable
Type of endpoint(s)

Anticipated date of first participant enrolment
Actual date of first participant enrolment
Anticipated date last participant enrolled
Actual date last participant enrolled
Target sample size
Actual sample size
Recruitment status
Recruitment in Australia
Recruitment state(s)
Recruitment postcode(s) 3329 0
Recruitment postcode(s) 3330 0
Recruitment postcode(s) 3331 0
Recruitment postcode(s) 3332 0
Recruitment postcode(s) 3333 0
Recruitment postcode(s) 3334 0
Recruitment postcode(s) 3335 0
Recruitment postcode(s) 3336 0
Recruitment postcode(s) 3337 0
Recruitment postcode(s) 3338 0
Recruitment postcode(s) 3339 0
Recruitment postcode(s) 3340 0
Recruitment postcode(s) 3341 0
Recruitment postcode(s) 3342 0
Recruitment postcode(s) 3343 0
Recruitment postcode(s) 3344 0
Recruitment postcode(s) 3345 0
Recruitment postcode(s) 3346 0
Recruitment postcode(s) 3347 0
Recruitment postcode(s) 3348 0
Recruitment postcode(s) 3349 0
Recruitment postcode(s) 3350 0

Funding & Sponsors
Funding source category 257858 0
Government body
Name 257858 0
National Health and Medical Research Council
Address 257858 0
Level 1
16 Marcus Clarke Street
Canberra ACT 2601
Country 257858 0
Primary sponsor
Primary sponsor name
Queensland University of Technology
Primary sponsor address
Victoria Park Rd Kelvin Grove QLD 4059
Primary sponsor country
Secondary sponsor category 257063 0
Name 257063 0
University of Queensland
Address 257063 0
Brisbane QLD 4072
Country 257063 0

Ethics approval
Ethics application status
Ethics committee name 259891 0
Queensland University of Technology Human Ethics Committee
Ethics committee address 259891 0
Governance Services
Queensland University of Technology
GPO Box 2434
2 George Street
Brisbane Q 4001
Ethics committee country 259891 0
Date submitted for ethics approval 259891 0
Approval date 259891 0
Ethics approval number 259891 0

Brief summary
This project is a randomised controlled trial evaluating the effects of "MobileMums": an intervention delivered predominantly by mobile telephone text messaging. The aim of this study is to determine the effects of the program on physical activity levels of women with young children, relative to a control group. We hypothesise that MobileMums will increase the amount of time women spend doing moderate-to-vigorous intensity physical activity each week.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 31787 0
Address 31787 0
Country 31787 0
Phone 31787 0
Fax 31787 0
Email 31787 0
Contact person for public queries
Name 15034 0
Jasmine O'Brien
Address 15034 0
School of Public Health
Queensland University of Technology
Victoria Park Rd Kelvin Grove QLD 4059 Australia
Country 15034 0
Phone 15034 0
+ 61 73138 3016
Fax 15034 0
Email 15034 0
Contact person for scientific queries
Name 5962 0
Associate Professor Alison Marshall
Address 5962 0
School of Public Health
Queensland University of Technology
Victoria Park Rd Kelvin Grove QLD 4059 Australia
Country 5962 0
Phone 5962 0
+61 7 3138 5856
Fax 5962 0
Email 5962 0