An interventional study of A chatbot-based intervention in Healthy Lifestyle, sponsored by The Hong Kong Polytechnic University. Completed at 1 site in Hong Kong. Open to participants aged 65 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-09-16.
Sponsored by The Hong Kong Polytechnic University · Not applicable, Interventional, and Health services research
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.
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.
The Hong Kong Polytechnic University is the lead sponsor of 659 studies on the registry; 250 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Exclusion Criteria:
Participants will immediately receive access to a 2-month chatbot-based intervention
Other: A chatbot-based intervention
Participants will be placed on a waiting list before accessing the intervention
Other: A chatbot-based intervention
A smartphone-delivered AI-based chatbot program designed to provide personalized physical activity and dietary recommendations
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)
Time frame: 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.
Time frame: 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.
Time frame: End of study (2 months)
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.
Time frame: 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
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
The CHAMPS-Q measures weekly frequency and duration of a variety of lifestyle physical activities
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
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)
Time frame: Baseline, end of study (2 months)
Plan to share: No — No sharing of data except reasonable request.
No publications or documents are linked to this record.
This study is completed, as verified in Sep 2026. You cannot join it, but the record below documents what was studied.
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The Hong Kong Polytechnic University