NCT01892475

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.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
314

participants targeted

Target at P75+ for not_applicable

Timeline
Completed

Started Nov 2013

Typical duration for not_applicable

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

July 1, 2013

Completed
3 days until next milestone

First Posted

Study publicly available on registry

July 4, 2013

Completed
4 months until next milestone

Study Start

First participant enrolled

November 1, 2013

Completed
2.1 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

December 1, 2015

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

December 1, 2015

Completed
Last Updated

January 5, 2016

Status Verified

January 1, 2016

Enrollment Period

2.1 years

First QC Date

July 1, 2013

Last Update Submit

January 3, 2016

Conditions

Physical ActivityIncentives

Keywords

Physical ActivityIncentivesMental AccountingOlder adults

Outcome Measures

Primary Outcomes (1)

  • Steps taken

    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.

    7 months

Secondary Outcomes (6)

  • Body Mass Index (BMI)

    7 months

  • Resting Heart Rate

    7 months

  • Blood Pressure

    7 months

  • Self-reported General Health

    7 months

  • Health-Related Quality of Life (HR-QOL)

    7 months

  • +1 more secondary outcomes

Study Arms (2)

Cash Only (CO)

EXPERIMENTAL

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 programBehavioral: 3-month follow up

Mental-Accounting (MA) based

EXPERIMENTAL

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 programBehavioral: 3-month follow up

Interventions

Incentive-based physical activity programBEHAVIORAL

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)

Cash Only (CO)Mental-Accounting (MA) based
3-month follow upBEHAVIORAL

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.

Cash Only (CO)Mental-Accounting (MA) based

Eligibility Criteria

Age50 Years - 75 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64), Older Adult (65+)

You may qualify if:

  • 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

You may not qualify if:

  • 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

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Duke-NUS Graduate Medical School

Singapore, Singapore, 169857, Singapore

Location

MeSH Terms

Conditions

Motor Activity

Condition Hierarchy (Ancestors)

Behavior

Study Officials

  • Eric A Finkelstein, Ph.D, M.H.A.

    Duke-NUS Graduate Medical School

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
SINGLE
Who Masked
OUTCOMES ASSESSOR
Purpose
PREVENTION
Intervention Model
PARALLEL
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Professor

Study Record Dates

First Submitted

July 1, 2013

First Posted

July 4, 2013

Study Start

November 1, 2013

Primary Completion

December 1, 2015

Study Completion

December 1, 2015

Last Updated

January 5, 2016

Record last verified: 2016-01

Locations

SG(1)