Healthy LifestyleNCT06901037
A Pilot Randomized Controlled Trial of Chatbot Use in Older Adults for Lifestyle Change
A study testing A chatbot-based intervention in people with Healthy Lifestyle, run by The Hong Kong Polytechnic University at 1 site in Hong Kong.
Trial summary
The purpose of this study is to evaluate the acceptability and preliminary effectiveness of a smartphone-delivered AI-based chatbot in promoting healthy dietary behavior and physical activity participation among older adults. Read more about this study
- Who is it for?
- Ages 65 years and olderHealthy volunteers can take part
- Conditions the study is for
- Healthy Lifestyle
- What is being tested?
- A chatbot-based intervention
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 50 participants
- Where
- 1 siteHong Kong
- Study dates
- 1 May 2025to 31 Jul 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 65 years and older
- All sexes
- Healthy volunteers accepted
- Older adult
Who may be able to join
- aged 65 or above.
- are community-dwelling.
- are proficient in Mandarin.
- have an Internet connection.
- have at least one instant messaging app on the smartphone or agree to download one.
Who cannot join
- have any neurocognitive disorders.
- are unable to engage in moderate-intensity level of physical activity due to a preexisting medical condition.
- live with another participant who will participate in this study.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: The Acceptability and Preliminary Effectiveness of Using A Smartphone-delivered AI-Based Chatbot in Older Adults for Lifestyle Modification: A Pilot Randomized Controlled Trial
The purpose of this study is to evaluate the acceptability and preliminary effectiveness of a smartphone-delivered AI-based chatbot in promoting healthy dietary behavior and physical activity participation among older adults.
Read the detailed description
The purpose of this study is to evaluate the preliminary effectiveness of a smartphone-delivered AI-based chatbot in promoting healthy dietary behavior and physical activity participation among older adults. It is a preliminary study with two arms.
- Conditions
- Healthy Lifestyle
- Being tested
- A chatbot-based intervention
- Keywords
- Chatbot, older adults
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
A chatbot-based interventionOther
A smartphone-delivered AI-based chatbot program designed to provide personalized physical activity and dietary recommendations
| Study group | Role | What they receive |
|---|---|---|
| Chatbot-based intervention | Experimental | Participants will immediately receive access to a 2-month chatbot-based intervention Receives: Other: A chatbot-based intervention |
| Waitlist | Other | Participants will be placed on a waiting list before accessing the intervention Receives: Other: A chatbot-based intervention |
What is being measured
The primary outcome is the main question the study is designed to answer.
The acceptance of the chatbot among older adults, as measured by a 14-item simplified version of the Senior Technology Acceptance Model questionnaire
The 14-item questionnaire uses a 10-point Likert scale, ranging from 0 (strongly disagree, very poor, very uneasy, and very unsatisfied) to 10 (strongly agree, very good, very easy, and very satisfied)
Measured: End of study (2 months)
The Usability of the chatbot, as measured by the System Usability Scale
The System Usability Scale (SUS) is a 10-item Likert scale questionnaire. The result of this survey is called SUS score, which ranges from 0 to 100 and provides information about overall customer satisfaction and usability. A higher score indicates better usability, while a lower score may suggest usability issues.
Measured: End of study (2 months)
The user experience, as measured by 10 open-ended questions
A qualitative interview will be provided to the participants for asking their experience in using chatbot.
Measured: End of study (2 months)
Secondary outcomes (4)
Change of dietary behavior, as measured by the intake of fruits and vegetables over the last seven days
We will ask them the amount of fruit and vegetable intake at baseline and end of study.
Measured: Baseline, end of study (2 months)
Change of walking, as measured by the Community Health Activities Model Program for Seniors questionnaire
The Community Health Activities Model Program for Seniors questionnaires (CHAMPS-Q) measures weekly frequency and duration of walking
Measured: Baseline, end of study (2 months)
Change of total activity and moderate and more vigorous physical activity variables, as measured by the CHAMPS-Q
The CHAMPS-Q measures weekly frequency and duration of a variety of lifestyle physical activities
Measured: Baseline, end of study (2 months)
Change of quality of life, as measured by the Hong Kong Quality of Life for Older Persons Scale
The Hong Kong Quality of Life for Older Persons Scale (HKQoLOCP) comprises a total of 21 items that can be categorized into different domains: subjective well-being, consisting of 4 items; health, comprising 5 items; interpersonal relationships, including 6 items; achievement-recognition, with 4 items; and finance and living conditions (1 item each)
Measured: Baseline, end of study (2 months)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Mar 2025
- Study start1 May 2025
- Primary completion30 Apr 2026
- Study completion31 Jul 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Healthy LifestyleStudies of the same condition, open and under way.
- More trials run by The Hong Kong Polytechnic UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind
- Who is masked
- Participant, Outcomes assessor
- Enrolment
- 50 participants (actual)
Sponsor and investigators
- Lead sponsor
- The Hong Kong Polytechnic University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Arkers, Wong, The Hong Kong Polytechnic University
- Investigators
- Arkers Wong, PhD, Principal investigator, The Hong Kong Polytechnic University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06901037
- Sponsor's protocol ID
- HSEARS20250305010
- Status last verified
- Sep 2026
- First submitted
- 23 Mar 2025
- Last updated
- 16 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: No sharing of data except reasonable request.
Study at a glance
From the registry record, last updated by the sponsor on 16 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Acceptability and Preliminary Effectiveness of Using A Smartphone-delivered AI-Based Chatbot in Older Adults for Lifestyle Modification: A Pilot Randomized Controlled Trial
- ClinicalTrials.gov ID
- NCT06901037
- Acronym / sponsor ID
- HSEARS20250305010
- Conditions
- Healthy Lifestyle
- Keywords
- Chatbot, older adults
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 50 participants (actual)
- Lead sponsor
- The Hong Kong Polytechnic UniversityUniversity, hospital or other
- Study start
- 1 May 2025 (actual)
- Primary completion
- 30 Apr 2026 (actual)
- Study completion
- 31 Jul 2026 (actual)
- First posted
- 28 Mar 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to evaluate the acceptability and preliminary effectiveness of a smartphone-delivered AI-based chatbot in promoting healthy dietary behavior and physical activity participation among older adults.
Detailed description
The purpose of this study is to evaluate the preliminary effectiveness of a smartphone-delivered AI-based chatbot in promoting healthy dietary behavior and physical activity participation among older adults. It is a preliminary study with two arms.
Study design
- Primary purpose
- Health services research
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Double blind (participant, outcomes assessor)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Chatbot-based intervention | Experimental | Other: A chatbot-based interventionParticipants will immediately receive access to a 2-month chatbot-based intervention |
| Waitlist | Other | Other: A chatbot-based interventionParticipants will be placed on a waiting list before accessing the intervention |
Who may qualify
- Ages
- 65 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Older adult
Key inclusion criteria (5 listed)
- aged 65 or above.
- are community-dwelling.
- are proficient in Mandarin.
- have an Internet connection.
- have at least one instant messaging app on the smartphone or agree to download one.
Key exclusion criteria (3 listed)
- have any neurocognitive disorders.
- are unable to engage in moderate-intensity level of physical activity due to a preexisting medical condition.
- live with another participant who will participate in this study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| A chatbot-based interventionA smartphone-delivered AI-based chatbot program designed to provide personalized physical activity and dietary recommendations | Other | Chatbot-based intervention, Waitlist |
Primary outcome
The acceptance of the chatbot among older adults, as measured by a 14-item simplified version of the Senior Technology Acceptance Model questionnaire
Time frame: End of study (2 months)
The 14-item questionnaire uses a 10-point Likert scale, ranging from 0 (strongly disagree, very poor, very uneasy, and very unsatisfied) to 10 (strongly agree, very good, very easy, and very satisfied)
The Usability of the chatbot, as measured by the System Usability Scale
Time frame: End of study (2 months)
The System Usability Scale (SUS) is a 10-item Likert scale questionnaire. The result of this survey is called SUS score, which ranges from 0 to 100 and provides information about overall customer satisfaction and usability. A higher score indicates better usability, while a lower score may suggest usability issues.
The user experience, as measured by 10 open-ended questions
Time frame: End of study (2 months)
A qualitative interview will be provided to the participants for asking their experience in using chatbot.
4 secondary outcomes
Change of dietary behavior, as measured by the intake of fruits and vegetables over the last seven days
Time frame: Baseline, end of study (2 months)
Change of walking, as measured by the Community Health Activities Model Program for Seniors questionnaire
Time frame: Baseline, end of study (2 months)
Change of total activity and moderate and more vigorous physical activity variables, as measured by the CHAMPS-Q
Time frame: Baseline, end of study (2 months)
Change of quality of life, as measured by the Hong Kong Quality of Life for Older Persons Scale
Time frame: Baseline, end of study (2 months)
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 16 Sep 2026.
- Individual participant dataSharing planned: No. No sharing of data except reasonable request.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Arkers Wong, PhD principal investigator
The Hong Kong Polytechnic University
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing A chatbot-based intervention in people with Healthy Lifestyle, run by The Hong Kong Polytechnic University at 1 site in Hong Kong.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 3 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 16 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Hong Kong. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The acceptance of the chatbot among older adults, as measured by a 14-item simplified version of the Senior Technology Acceptance Model questionnaire (time frame: End of study (2 months)). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 16 Sep 2026.