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Texting your way to early cancer detection: study tests SMS reminders

NCT ID NCT04343950

Knowledge-focused Sponsor: Institut Català d'Oncologia 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 26, 2026 · Updated 1 time

Summary

This study looked at whether sending text message reminders could increase the number of people who take part in colorectal and breast cancer screening programs. Over 44,000 eligible adults were included, and researchers compared SMS reminders to standard letters or no reminder. The goal was to see if texting is a cost-effective way to boost screening participation and catch cancers earlier.

What this could mean

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

Active substance
SMS reminders
What this could lead to
If successful, this could show that simple text reminders are a cost-effective way to get more people screened for cancer, potentially catching more cases early.
What could go wrong
This is a completed study, so results are available. However, it only tested SMS in specific regions and programs, so findings may not apply everywhere. Also, people without mobile phones were excluded.

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

44,601 people

The number who actually took part.

Started

Jun 2021

Finished

Dec 2022

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

50 to 69 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: * Eligible individuals for colorectal cancer screening (intervention 1 and 2) * Eligible women for breast cancer screening (intervention 3) * Registered at the HealthCare Database (RCA) Exclusion Criteria: * Individuals without a mobile phone number registered at the RCA * Opt out from breast cancer screening and/or colorectal cancer screening

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Conditions

The condition(s) this trial relates to.

breast cancer breast neoplasm colorectal cancer colorectal neoplasm

As listed by the trial registrant

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

Breast cancer Colorectal cancer Mass screening

Contacts and locations

Locations

  • Institut Català d'Oncologia

    L'Hospitalet de Llobregat, Barcelona, 08908, Spain

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