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TAKing Steps for Incentives (TAKSI)

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ClinicalTrials.gov Identifier: NCT01892475
Recruitment Status : Completed
First Posted : July 4, 2013
Last Update Posted : January 5, 2016
Sponsor:
Information provided by (Responsible Party):
Eric A. Finkelstein, Duke-NUS Graduate Medical School

Brief Summary:
The purpose of this study is to test the overall effects of incentives on physical activity among older taxi drivers, and whether mental accounting exists in this context.

Condition or disease Intervention/treatment Phase
Physical Activity Incentives Behavioral: Incentive-based physical activity program Behavioral: 3-month follow up Not Applicable

Detailed Description:
As part of the 4-month Randomized Controlled Trial, participating taxi drivers will be assigned to 1 of 2 groups where they will receive either cash or taxi rental credits for meeting specified monthly step goals measured via a step counter. Subsequently, for an additional 3 months, drivers will be incentivized to wear step counters to test if effects of the rewards are sustained once the reward is no longer in place. Effects will be quantified in terms of step activity; and in terms of changes in Body Mass Index (BMI), Resting Heart Rate (HR), Blood Pressure (BP), self-reported General Health, Health-Related Quality of Life (HR-QOL) and work productivity.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 314 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Prevention
Official Title: TAKing Steps for Incentives (TAKSI) - A Randomized Controlled Trial to Motivate and Sustain Physical Activity Using Financial Incentives
Study Start Date : November 2013
Actual Primary Completion Date : December 2015
Actual Study Completion Date : December 2015

Resource links provided by the National Library of Medicine


Arm Intervention/treatment
Experimental: Cash Only (CO)
As part of the Incentive-based physical activity program, drivers assigned to the Cash Only (CO) arm will earn incentives in the form of cash for meeting specified monthly step goals from Months 1 to 4.
Behavioral: Incentive-based physical activity program

Drivers will be offered rewards valued at a day's rental for meeting daily step targets over the specified number of days each month from Months 1 to 4, where steps will be tracked by a step counter. They will also be offered incentives for meeting the following criteria:

  1. Accurately predicting step target attainment the following months (SGD10)
  2. Wearing and providing step data over the month (SGD10 and a chance to win 1 of 3 cash prizes valued at SGD500)

Behavioral: 3-month follow up
After the 4-month RCT, drivers will be incentivized to wear the step counter for another 3 months (i.e. Months 5 to 7) to test if effects of the rewards are sustained once the reward is no longer in place. For wearing their step counter and providing their step data, drivers will receive a modest cash incentive (amounting to SGD10) each month as well as the chance to win 1 of 3 cash prizes valued at SGD500.

Experimental: Mental-Accounting (MA) based
As part of the Incentive-based physical activity program, drivers assigned to the Mental-Accounting (MA) based arm will receive incentives in the form of taxi rental credits for meeting specified monthly step goals from Months 1 to 4.
Behavioral: Incentive-based physical activity program

Drivers will be offered rewards valued at a day's rental for meeting daily step targets over the specified number of days each month from Months 1 to 4, where steps will be tracked by a step counter. They will also be offered incentives for meeting the following criteria:

  1. Accurately predicting step target attainment the following months (SGD10)
  2. Wearing and providing step data over the month (SGD10 and a chance to win 1 of 3 cash prizes valued at SGD500)

Behavioral: 3-month follow up
After the 4-month RCT, drivers will be incentivized to wear the step counter for another 3 months (i.e. Months 5 to 7) to test if effects of the rewards are sustained once the reward is no longer in place. For wearing their step counter and providing their step data, drivers will receive a modest cash incentive (amounting to SGD10) each month as well as the chance to win 1 of 3 cash prizes valued at SGD500.




Primary Outcome Measures :
  1. Steps taken [ Time Frame: 7 months ]
    Steps will be assessed using Fitbit, which has an in-built 3-axis accelerometer that measures motion patterns. This will be evaluated monthly, from pre-Baseline through Month 7.


Secondary Outcome Measures :
  1. Body Mass Index (BMI) [ Time Frame: 7 months ]
    BMI will be evaluated using measured height and weight, and will be assessed at Months 0 (Baseline), 4 and 7.

  2. Resting Heart Rate [ Time Frame: 7 months ]
    Resting Heart Rate will be evaluated using a clinically validated machine (Welch Allyn SPOT Vital Signs Monitor), and will be assessed at Months 0 (Baseline), 4 and 7.

  3. Blood Pressure [ Time Frame: 7 months ]
    Blood pressure will be evaluated using a clinically validated machine (Welch Allyn SPOT Vital Signs Monitor), and will be assessed at Months 0 (Baseline), 4 and 7.

  4. Self-reported General Health [ Time Frame: 7 months ]
    Self-reported General Health will be evaluated using a validated survey instrument (SF12), and will be assessed at Months 0 (Baseline), 4 and 7.

  5. Health-Related Quality of Life (HR-QOL) [ Time Frame: 7 months ]
    Health-Related Quality of Life will be evaluated using a validated instrument (EQ-5D), and will be assessed at Months 0 (Baseline), 4 and 7.

  6. Work Productivity [ Time Frame: 7 months ]
    Work Productivity will be evaluated using a validated instrument (Work Productivity Activity Impairment Questionnaire) and other work-related data, and will be assessed throughout Months 0 (Baseline), 4 and 7.



Information from the National Library of Medicine

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Ages Eligible for Study:   50 Years to 75 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Must be a taxi driver who is a hirer, and who drives for at least 8 hours daily over 5 days
  • Aged between 50 to 75
  • English/Mandarin-speaking

Exclusion Criteria:

  • Report difficulty doing 10 minutes of aerobic activities without stopping, walking up 10 stairs without stopping or performing basic activities of daily living
  • Have any medical conditions that limit their ability to walk as a means of physical activity

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01892475


Locations
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Singapore
Duke-NUS Graduate Medical School
Singapore, Singapore, 169857
Sponsors and Collaborators
Duke-NUS Graduate Medical School
Investigators
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Principal Investigator: Eric A Finkelstein, Ph.D, M.H.A. Duke-NUS Graduate Medical School

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Responsible Party: Eric A. Finkelstein, Professor, Duke-NUS Graduate Medical School
ClinicalTrials.gov Identifier: NCT01892475     History of Changes
Other Study ID Numbers: DPRT/AGE/2010/20
First Posted: July 4, 2013    Key Record Dates
Last Update Posted: January 5, 2016
Last Verified: January 2016
Keywords provided by Eric A. Finkelstein, Duke-NUS Graduate Medical School:
Physical Activity
Incentives
Mental Accounting
Older adults