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

NCT ID NCT04343950

Completed Knowledge-focused Sponsor: Institut Català d'Oncologia Source: ClinicalTrials.gov ↗

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.

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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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