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Can a simple WhatsApp message save lives? chile tests new screening nudge

NCT ID NCT07644910

Knowledge-focused Sponsor: University of Chile 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This study will send different types of WhatsApp messages to 235,000 people in Chile who are due for cancer or chronic disease screenings. Researchers want to see if the way a message is worded (basic, risk-focused, or peace-of-mind) and whether it mentions one test or both tests together makes people more likely to schedule their appointments. The goal is to find the best way to encourage preventive care.

What this could mean

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

What this could lead to
If successful, this could show how to better encourage people to get recommended cancer and chronic disease screenings through simple text messages.
What could go wrong
This is an observational-style behavioral study, not testing a medical treatment. Results may not apply to other populations or settings.

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

About 235,000 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jun 2026

An estimate. Start dates often move.

Expected to finish

Dec 2026

An estimate. End dates often move.

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

21 to 74 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: * Has at least one pending cancer screening (breast, colorectal, cervical, or prostate) within the contact window, as determined by the medical institution * Aged 21 to 74 years * Has a valid phone number on file * Eligibility is determined operationally before randomization (ex-ante) Exclusion Criteria: * Participants whose WhatsApp message was not successfully delivered, as reported by the third-party software used by the medical institution.

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Conditions

The condition(s) this trial relates to.

breast neoplasm colorectal neoplasm diabetes mellitus Dyslipidemias hyperlipidemia inherited lipid metabolism disorder prostate cancer prostate neoplasm Uterine Cervical Neoplasms uterine cervix neoplasm

As listed by the trial registrant

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

Breast neoplasms Colorectal neoplasms Diabetes mellitus Dyslipidemias Prostatic neoplasms Uterine cervical neoplasms

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

More trials for these conditions

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