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NCT03907683 · ClinicalTrials.gov registry record · Phase 1
Random Assignment of Intervention Messages for Developing Personalized Decision Rules to Promote Physical Activity
A Phase 1 study, sponsored by Penn State University.
- Completed
- Registry status
- Phase 1
- Development phase
- 82
- Enrollment target
NCT03907683: Completed Phase 1 study, sponsored by Penn State University.
NCT03907683 is a Phase 1 study that has completed, run by Penn State University. The registered enrollment target is 82 participants, above the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (37% higher). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT03907683, a Phase 1 study, has completed, sponsored by Penn State University.
- COMPLETED
- Registry status
- Phase 1
- Development phase
- 82 participants
- Enrollment target
Study Summary
Our goal is to develop personalized decision rules for selecting the frequency, timing, and content of messages to promote physical activity. The objective of this project is to develop personalized dynamical models of physical activity (PA) under different weather and temporal conditions as well as in response to different types of intervention messages. This approach relies on having extensive observations within the person under varying conditions to develop a dynamical model of how different conditions interact with each other to predict how behavior changes in response to text messages. Complementary sub-models will be estimated for each participant to describe their behavioral responses under different weather conditions. Healthy but insufficiently active young adults (n=80) will wear an activity monitor and receive a variety of randomly-timed and randomly-selected notifications via smartphone. GPS coordinates at the time of messages delivery and receipt are recorded and used to look up weather indices at that location at that time. The work is exploratory/descriptive as we will be developing models to describe participants' responses to messages under different weather conditions. This work is needed to develop the decision rules for a subsequent behavioral intervention that will be developed and tested in a future project.
Primary Outcome
Fitbit-assessed minutes with step counts \>= 100 steps/min in 15-minute epochs (steady states represent the change in expected step counts if a message was delivered versus if the message was not delivered)
Interventions
- BEHAVIORAL Short Message with Text and Optional Image
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 82 participants |
| Start Date | 2019-04-03 |
| Est. Completion | 2020-07-21 |
| Phase | Phase 1 |
What the finished NCT03907683 record still lists
NCT03907683 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 82 participants, a relatively small participant target, above the 60-participant average among 29,502 other Phase 1 trials with a reported enrollment target (37% higher).
The record links to 0 conditions, and to 1 intervention - of which Short Message with Text and Optional Image is the first listed.
NCT03907683 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT03907683 about?
NCT03907683 is a clinical study titled "Random Assignment of Intervention Messages for Developing Personalized Decision Rules to Promote Physical Activity". Our goal is to develop personalized decision rules for selecting the frequency, timing, and content of messages to promote physical activity. The objective of this project is to develop personalized dynamical models of physical activity (PA) under different weather and temporal conditions as well as...
What is the current status of trial NCT03907683?
This trial is currently completed. It is a Phase 1 study. The enrollment target is 82 participants. The study started on 2019-04-03. Estimated completion is 2020-07-21.
What interventions are being tested in trial NCT03907683?
The interventions under investigation include: Short Message with Text and Optional Image (BEHAVIORAL).
Who is sponsoring clinical trial NCT03907683?
This trial is sponsored by Penn State University, which has 219 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT03907683's enrollment target sits among peer trials
82 669th of 2000 higher than 1,330 of 2,000 other Phase 1 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 1 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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