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Chatbot boosts cancer screening uptake in hong kong trial

NCT ID NCT06192862

Knowledge-focused Sponsor: Chinese University of Hong Kong 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Updated 1 time

Summary

This study tested whether a theory-based chatbot could increase colorectal cancer screening rates. 500 adults aged 50-75 in Hong Kong were randomly assigned to receive either standard text reminders or a chatbot that provided personalized risk information and screening guidance. The main goal was to see if more people completed a fecal immunochemical test (FIT) within 3 months.

What this could mean

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

Active substance
chatbot-based health education and reminders
What this could lead to
If effective, this approach could increase colorectal cancer screening rates in at-risk populations, potentially catching more cancers early.
What could go wrong
This is a completed trial, but the intervention is behavioral and may not work in other settings or cultures. The chatbot requires smartphone access, which may limit reach.

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

500 people

The number who actually took part.

Started

Jul 2024

Finished

Nov 2025

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 75 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: * 50-75 years old * asymptomatic and eligible to enroll in a government-subsidized colorectal cancer screening program * subjects themselves or their family members living in the same household with access to WhatsApp Messenger * able to read Chinese * willingness to be followed up by telephone Exclusion Criteria: * subject without access to WhatsApp Messenger * unable to provide informed consent

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Conditions

The condition(s) this trial relates to.

colorectal cancer colorectal carcinoma colorectal neoplasm

As listed by the trial registrant

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

Colorectal cancer CRC (colorectal cancer)

Contacts and locations

Locations

  • Centre of Digestive Health, Prince of Wales Hospital

    Hong Kong, Hong Kong

More trials for these conditions

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