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Can a phone call at the right time stop weight regain?

NCT ID NCT04116853

Disease control Sponsor: University of Florida Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested two phone-based programs to help people maintain weight loss after an initial diet. 255 adults with obesity first lost at least 5% of their body weight, then were randomly assigned to either a standard monthly check-in or an adaptive program that called more often when a risk of regain was detected. The goal was to see which approach better prevented weight regain over two years.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
phone-based behavioral coaching program
What this could lead to
If successful, this approach could offer a more efficient way to help people keep weight off after an initial loss.
What could go wrong
This is a completed behavioral study, not a drug trial. Results may not apply to everyone, and weight regain remains a common challenge.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

255 people

The number who actually took part.

Started

Oct 2019

Finished

Nov 2024

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 70 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * BMI 30.0-45.0 kg/m2 * Own a smartphone \[Apple iPhone (5s or newer) or Android smartphone (KitKat OS 4.4 or newer)\] with a cellular and data plan * Weight ≤ 396 pounds (due to scale limit) * Lose ≥ 5% of baseline weight during the initial weight loss intervention (Month 0 to Month 4) * Completion of baseline assessment measures Exclusion Criteria: * History of bariatric surgery * Current use of weight loss medications * Weight loss of ≥ 10 lb in prior 6 months * Physical limitations that prevent walking ¼ mile without stopping * Use of a pacemaker * Currently pregnant * Currently breastfeeding * Less than 1 year post-partum * Plans to become pregnant within the study period * Lack of written approval for participation from potential participant's physician if the participant has been diagnosed with type 2 diabetes, hypertension, or has a history of coronary heart disease * More than one participant per household (enrollment limited to one participant per household) * Medical conditions that contraindicate weight loss or prevent completion of the study (e.g., current diagnosis of cancer or terminal illness, dementia, or plans to relocate during the study period)

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Conditions

The condition(s) this trial relates to.

Obesity obesity disorder Weight Loss

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Obesity

Contacts and locations

Locations

  • University of Florida

    Gainesville, Florida, 32610, United States

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Other studies related to the condition(s) this trial covers.