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Sedentary BehaviorNCT04518943

Multiphase Optimization Trial of Incentives for Veterans to Encourage Walking

A study testing Walking in people with Sedentary Behavior and Exercise, run by VA Office of Research and Development at 1 site in United States.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

Regular physical activity (PA) is essential to healthy aging. Unfortunately, only 5% of US adults meet guideline of 150 minutes of moderate exercise; Veterans and non-Veterans have similar levels of PA. A patient incentive program for PA may help. Read more about this study

Who is it for?
Ages 50 to 69 years
Conditions the study is for
Sedentary Behavior, Exercise, Walking
What is being tested?
Walking
Could I receive a placebo?
No, everyone receives an active treatment
How many people
102 participants
Where
1 siteUnited States
Study dates
17 Mar 2022to 31 Jul 2024
Phase
Interventional
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 50 to 69 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Veteran that receives healthcare at VA Puget Sound Health Care System
  • Age 50-69
  • Diagnosis of hypertension, depression or a BMI between 25-40.
  • Physically inactive according to self-report. .
  • 2,000-5,000 steps per day during the screening week
  • Have and be able to use a smart phone.

Who cannot join

  • MOVE participation in the past 4 months
  • Blind
  • <2,000 steps per day
  • Inability to walk 20 minutes without stopping (self-report).
  • Eating disorder.
  • Dementia/ cognitive impairment
Show all 14Show fewer
  • Metastatic cancer, end state renal disease, hospice, palliative care, heart failure, undergoing chemotherapy, radiation or hemodialysis, have had or are on the list for an organ transplant.
  • Implanted cardiovascular device such as defibrillator or ventricular device
  • Active psychosis/mania/behavioral flag
  • Pregnant women
  • Homeless or housing insecure
  • Has a paid caregiver that provides >50% of daily living activities, lives in a nursing home, assisted living facility or group home.
  • Individuals that exhibit threatening, violent or inappropriate behavior during the screening phone call.
  • Foot Ulcer

Trial locations and contacts

1 site in 1 country.

United States1 site
  • VA Puget Sound Health Care System Seattle Division, Seattle, WA

    Seattle, Washington, 98108-1532

Other trials in United States

About this study

Regular physical activity (PA) is essential to healthy aging. Unfortunately, only 5% of US adults meet guideline of 150 minutes of moderate exercise; Veterans and non-Veterans have similar levels of PA. A patient incentive program for PA may help. Behavioral economics suggests that the chronic inability to start and maintain a PA routine may be the result of "present bias," which is a tendency to value immediate rewards over rewards in the future. With present bias, it is always better to exercise tomorrow because the immediate gratification of watching television or surfing the internet is a more powerful motivator than the intangible and delayed benefit of future health. Patient incentives may overcome present bias by moving the rewards for exercise forward in time.

Recent randomized trials suggest that incentives for PA can be effective, but substantial gaps in knowledge prevent the implementation of a PA incentive program in Veterans Affairs (VA). First, incentive designs vary considerably. They vary by the size of the incentive, the type of incentive (cash or non-financial), the probability of earning an incentive (an assured payment for effort or a lottery-based incentive), or whether the incentive is earned after the effort is given (a gain-framed incentive) or awarded up-front and lost if the effort is not given (a loss-framed incentive). The optimal combination of these components for a Veteran population is unknown. Second, the evidence about the effective components of incentives comes from studies conducted in populations that were overwhelmingly female; often employees at large companies, with high levels of education and income. VA users, in contrast, are mostly male and lower income, and most are not employed. This is important because the investigators have theoretical reasons to believe that the effects of components of incentives are likely to vary by income and gender. Finally, few studies have managed to design an incentive such that the physical activity was maintained after the incentive was removed. Indeed, a common theme in incentivizing health behavior change is the difficulty in sustaining behavior change once the incentives are removed.

Read the detailed description

The investigators propose to fill the research gaps through a Multiphase Optimization Strategy (MOST) trial of incentives for walking. A MOST trial is ideally suited for situations in which a proposed intervention has many potential intervention components. A MOST trial consists of three phases. A screening phase trial is used to efficiently identify-through a factorial designed randomized trial-the effective components of a complex intervention like incentives. A refining phase trial tests the optimal dose (size or duration) of the incentives. A confirmatory phase trial tests the optimal components and dose against a usual care control. The goal of the proposed study is to conduct the screening phase trial in 128 Veterans to identify the optimal components of incentives for increasing walking among physically inactive Veterans. All Veterans in this phase will be given various components of incentives for increasing average steps per day to 7,000 steps over a 12-week habit-building period, and then maintaining the increase through a 12-week habit maintenance period. The specific aims are:

Aim 1: Conduct a 24 factorial designed screening-phase trial of incentives for increasing average steps per day to 7,000 steps over 12 weeks among physically inactive Veterans. Every patient in the trial will be given a Fitbit Inspire activity monitor and assigned to a group that receives different components of incentives. The investigators will test four different incentive factors: 1) lottery vs. loss framed incentives, 2) financial vs. non-financial incentives, 3) a pre-commitment postcard reminder of a Veteran's stated intrinsic reason for commitment to PA vs. no pre-commitment postcard, and 4) a request for PA advice from a Veteran on staying active vs. no request. The first factor has never been tested in a population like the VA. Factors 2-4 are designed specifically to sustain the effects of incentives after the incentive is removed. Factor 4 is a novel hypothesis that has never been tested outside of educational research: specifically, that asking for advice from a Veteran is more motivating than giving advice to them, even if that Veteran is struggling with low physical activity themselves. The primary outcome is change in steps per week from baseline to week 24.

Aim 2. Conduct cost analyses and qualitative interviews. The cost of administering each component and qualitative assessments of the acceptability of each component to trial participants will inform the decision of which components to retain for the subsequent refining and confirmatory phase trials.

Aim 3. Convene an expert panel to choose components for the next phases of the MOST trial. The panel will weigh each component in terms of its effect on step counts (Aim 1), administrative costs and participant-reported qualitative assessments (Aim 2), and the strength of the theoretical basis for the component's effect on physical activity.

Being tested
Walking
Keywords
sedentary behavior, walking, motivation
Medical subject headings
Sedentary Behavior, Motor Activity, Hypertension, Depression

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • WalkingBehavioural

    Inactive Veterans will be encouraged to increase their step count to 7,000 steps per day by the end of the 12-week intervention period. Weekly the step goal will increase 15% if they were successful in reaching their goal the previous week.

Study groups in NCT04518943
Study groupRoleWhat they receive
F1M1P1R1ExperimentalFinancial Reward, mixed lottery, pre-commitment postcard reminders, request physical activity advice
Receives: Behavioral: Walking
N1M1P1R1ExperimentalNon-financial reward, mixed lottery, pre-commitment postcard reminders, request physical activity advice
Receives: Behavioral: Walking
N1M1P1R0ExperimentalNon-financial reward, mixed lottery, pre-commitment postcard reminders, no request physical activity advice
Receives: Behavioral: Walking
N1M1P0R0ExperimentalNon-financial reward, mixed lottery, no pre-commitment postcard reminders, no request physical activity advice
Receives: Behavioral: Walking
N1M1P0R1ExperimentalNon-financial reward, mixed lottery, no pre-commitment postcard reminders, request physical activity advice
Receives: Behavioral: Walking
N1L1P1R1ExperimentalNon-financial reward, loss incentive, pre-commitment postcard reminders, request physical activity advice
Receives: Behavioral: Walking
N1L1P1R0ExperimentalNon-financial reward, loss incentive, pre-commitment postcard reminders, no request physical activity advice
Receives: Behavioral: Walking
N1L1P0R0ExperimentalNon-financial reward, loss incentive, no pre-commitment postcard reminders, no request physical activity advice
Receives: Behavioral: Walking
N1L1P0R1ExperimentalNon-financial reward, loss incentive, no pre-commitment postcard reminders, request physical activity advice
Receives: Behavioral: Walking
F1M1P1R0ExperimentalFinancial Reward, mixed lottery, pre-commitment postcard reminders, no request physical activity advice
Receives: Behavioral: Walking
F1M1P0R0ExperimentalFinancial Reward, mixed lottery, no pre-commitment postcard reminders, no request physical activity advice
Receives: Behavioral: Walking
F1M1P0R1ExperimentalFinancial Reward, mixed lottery, no pre-commitment postcard reminders, request physical activity advice
Receives: Behavioral: Walking
F1L1P1R1ExperimentalFinancial Reward, loss incentive, pre-commitment postcard reminders, request physical activity advice
Receives: Behavioral: Walking
F1L1P1R0ExperimentalFinancial Reward, loss incentive, pre-commitment postcard reminders, no request physical activity advice
Receives: Behavioral: Walking
F1L1P0R0ExperimentalFinancial Reward, loss incentive, no pre-commitment postcard reminders, no request physical activity advice
Receives: Behavioral: Walking
F1L1P0R1ExperimentalFinancial Reward, loss incentive, no pre-commitment postcard reminders, request physical activity advice
Receives: Behavioral: Walking

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Change in Average Steps Per Day From Baseline Week to Week 12

    The change in average steps per day from the baseline week to week 12.

    Measured: baseline to week 12

  2. Change in Average Steps Per Day From Baseline Week to Week 24

    The change in average steps per day from the baseline week to week 24

    Measured: baseline to week 24

Secondary outcomes (3)
  1. Self-efficacy

    Measured using the Exercise Self-Efficacy Scale at baseline, week 12 and week 24 (McAuley E 1993). This scale measures self-efficacy on nine different measures from not confident (0 rating) to very confident (10 rating).The range is 0 to 10. A higher rating indicates that the respondent is more confident they will be able to overcome barriers to physical activity.

    Measured: Measured at baseline, week 12 and 24

  2. Intrinsic/Extrinsic Motivation

    Measured using the Motivation for Physical Activity Measurement (MPAM) at baseline, week 12 and week 24 (Frederick CM 1993). This scale measures reasons and motivations for participating in physical activity having respondents indicate why they exercise. The scale ranges from 1=very true for me, 2= somewhat true for me, 3=neither true nor untrue for me, 4=somewhat untrue for me, 5= very untrue for me. The minimum score is 1 and the maximum is 5. Higher scores means more intrinsic motivation to exercise.

    Measured: Measured at baseline, week 12 and 24

  3. Mental Health

    Measured using the PHQ-8 depression scale at baseline, week 12 and week 24. This assessment measures depressive symptoms over the past 2 weeks. Respondents indicate how bothered they were by the following problems on a scale from 0 (not at all) to 3 (nearly every day). The minimum and maximum score are zero and 24, respectively. A lower score indicates fewer depressive symptoms.

    Measured: Measured at baseline, week 12 and 24

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted19 Aug 2020
  2. Study start17 Mar 2022
  3. Primary completion30 Nov 2023
  4. Study completion31 Jul 2024

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase N/A
Primary purpose
Health services research
Allocation
Randomised
Intervention model
Factorial
Model description
The MOST trial design involves optimizing an intervention before it is tested against a usual control. It is optimized in that the various components of the intervention are tested against one another in a screening phase to assess which components add value to the intervention, and then only the valuable components are included in the final intervention. It is especially useful when an intervention has many potential combinations of components, as is the case with incentives. In a traditional trial, researchers would use theory or evidence from prior studies to choose an incentive design and test this package against usual care. Even if this package outperforms usual care in a randomized trial, the investigators cannot tell whether it was optimal. Some components could have provided no benefit or delivered in too small a dose to be effective. Other components could have been detrimental to subjects. There is no way to know if the components are all tested as a single package.
Masking
Single blind
Who is masked
Investigator
Enrolment
102 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04518943
Sponsor's protocol ID
IIR 19-450
Status last verified
Apr 2025
First submitted
14 Aug 2020
Last updated
30 Apr 2025
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A study testing Walking in people with Sedentary Behavior and Exercise, run by VA Office of Research and Development at 1 site in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 6 inclusion and 14 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 30 Apr 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

Yes. Results are posted in the registry (first posted 30 Apr 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Change in Average Steps Per Day From Baseline Week to Week 12 (time frame: baseline to week 12). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 Apr 2025.

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