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Trial details imported from

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Registration number
Ethics application status
Date submitted
Date registered
Date last updated

Titles & IDs
Public title
Do Text Message Reminders Increase Preoperative Exercise in Obesity Surgery Candidates?
Scientific title
Text Messaging to Improve Adherence to Prehabilitation in Patients Undergoing Bariatric Surgery: a Randomised Controlled Trial
Secondary ID [1] 0 0
Bariatric Prehabilitation
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Perioperative Care 0 0
Bariatric Surgery 0 0
Obesity 0 0
Condition category
Condition code
Diet and Nutrition 0 0 0 0
Metabolic and Endocrine 0 0 0 0
Other metabolic disorders

Study type
Description of intervention(s) / exposure
Behaviour - Daily text message reminders

Experimental: Text message group - Patients randomised to this group will receive daily text message reminders used to motivate them to exercise in the preoperative period. They will also receive an exercise information sheet to complement the text messages.

No Intervention: No text message group - Patients randomised to this group will receive standardised exercise advice but will not receive the text message reminders or the exercise information sheet.

Behaviour: Daily text message reminders
Daily text message reminders to motivate patients to exercise in conjunction with an exercise information sheet.

Intervention code [1] 0 0
Comparator / control treatment
Control group

Primary outcome [1] 0 0
Proportion of patients partaking in the minimum recommended amount of weekly physical activity - >450 METmins per week of physical activity as measured by the internationally and locally validated IPAQ questionnaire.
Timepoint [1] 0 0
6 weeks post recruitment
Secondary outcome [1] 0 0
Postoperative Physical Activity - Quantity of physical acitivty will be measured as METmins per week as measured by the IPAQ questionnaire
Timepoint [1] 0 0
6 weeks postoperatively
Secondary outcome [2] 0 0
Functional capacity - Measured using the 6 minute walk test
Timepoint [2] 0 0
Baseline and 6 weeks post recuitment (preoperatively)
Secondary outcome [3] 0 0
Length of Hospital Stay - Total number of days spent in hospital following their operation
Timepoint [3] 0 0
As assessed at day of discharge
Secondary outcome [4] 0 0
Short term weight loss - Postoperative weight loss as measured by percentage of excess weight loss
Timepoint [4] 0 0
Out to 6 months postoperatively
Secondary outcome [5] 0 0
Perioperative complications - Prospectively recorded postoperative complications graded according the Clavien-Dindo classification system
Timepoint [5] 0 0
Out to 30 days postoperatively

Key inclusion criteria
- Patients having laparoscopic sleeve gastrectomy at Manukau Surgery Centre

- Operation used primarily for the treatment of morbid obesity
Minimum age
20 Years
Maximum age
60 Years
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
- Operation not performed at Manukau Surgery Centre

- Patient does not have a mobile phone which can receive text messages

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
Open (masking not used)
Who is / are masked / blinded?

Intervention assignment
Other design features
Phase 3
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Data analysis
Reason for early stopping/withdrawal
Other reasons
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)
Recruitment outside Australia
Country [1] 0 0
New Zealand
State/province [1] 0 0
Manukau City

Funding & Sponsors
Primary sponsor type
University of Auckland, New Zealand
Other collaborator category [1] 0 0
Name [1] 0 0
Health Research Council, New Zealand
Address [1] 0 0
Country [1] 0 0

Ethics approval
Ethics application status

Brief summary
Preoperative exercise has been shown to improve physiological and functional capacity in
patients undergoing abdominal surgery to prepare them for the stress of surgery. Patients
undergoing bariatric surgery are advised to partake in regular preoperative exercise. In the
setting of bariatric surgery, as well as preparing patients for the stress of surgery, it is
also thought to increase the likelihood that they will exercise postoperatively. However,
compliance to this advice is extremely low. Text-message interventions have been shown to
improve compliance to other lifestyle interventions. The investigators will compare the rate
of compliance to preoperative exercise prior to bariatric surgery in patients who receive a
daily text message to those who do not. The investigators will also compare weight loss.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 0 0
Andrew G Hill, MBChB, MD, EdD, FRACS, FACS
Address 0 0
South Auckland Clinical School, University of Auckland
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for public queries
Name 0 0
Address 0 0
Country 0 0
Phone 0 0
Fax 0 0
Email 0 0
Contact person for scientific queries

No data has been provided for results reporting
Summary results
Other publications