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RecruitingNCT07420426IMPACTUpdated May 18, 2026

Instant Message-delivered Personalised Acceptance and Commitment Therapy (IMPACT) for Neuropsychiatric Symptoms in Persons With Mild Cognitive Impairment

An interventional study of automated instant message-guided neuropsychiatric symptoms management and general mental health management in Mild Cognitive Impairment (MCI), sponsored by The University of Hong Kong. Recruiting at 1 site in Hong Kong. Open to participants aged 50 Years and older. Per ClinicalTrials.gov, last updated 2026-05-18.

Sponsored by The University of Hong Kong · Not applicable, Interventional, and Supportive care

From the registry’s dates

  • Started Dec 2025; still recruiting 9 months later.
Phase
Not applicable
Study type
Interventional
Enrollment
160
Allocation
Randomized
Ages
50 Years and older
Sex
All
01

Study summary

This study aims to develop an automated instant message-delivered intervention (i.e., EMI) for people with mild cognitive impairment to reduce their NPS, and to investigate the feasibility and effectiveness of the intervention.

Read the detailed description
  1. Message contents:

    The message content library will consist of four parts: 1.orientation, 2. brief mild cognitive impairment education messages, 3. acceptance and commitment therapy messages, 4.booster message.

  2. Message delivery

    • Regular messages: The messages in the four parts will be sent regularly to each participant. As personalisation is a core process subject to behavioural changes, the timing of the messages will be determined based on participants' preferences. To save labour and increase efficiency, the investigators will develop a message 'scheduler' program. The investigators will pre-set the message scheduler, which will then automatically send out content to the participants according to their preferences. The development of the program is highly useful particularly in cases which participants prefer to receive messages during non-office hours.
    • Real-time support messages (chat-type): Chat-based support will be given to the participants as an extension of the regular messages. However, the participants will be informed beforehand that the RA will only play a supportive role and will not provide formal care. The number of the chat messages will not be limited, but the real-time support messages will only be provided during working hours on weekdays to limit the RA's workload.

Control Group:

The control group will receive instant messages about mental health management from GovHK website (https://www.gov.hk/en/residents/health/mental/), which is open to the public.

02

Conditions studied

  • Mild Cognitive Impairment (MCI)

Keywords

  • mild cognitive impairment
  • acceptance and commitment therapy
  • neuropsychiatric symptoms
03

In context

Cognitive Dysfunction

3,843 studies on the registry are indexed under Cognitive Dysfunction; 1,100 are open to participants now.

This study's planned enrollment of 160 is above the median of 65 across 2,808 interventional studies indexed under Cognitive Dysfunction.

Browse Cognitive Dysfunction studies →

Lead sponsor

The University of Hong Kong is the lead sponsor of 1,262 studies on the registry; 340 are open to participants now.

Of its 8 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
50 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Community-dwelling adults aged ≥ 50 years
  • HK-MoCA score ranged from 18 to 22
  • MBI-C ≥7
  • SCD-9 ≥3
  • IADL =18
  • Able to read and communicate in Chinese
  • Able to use the text or voice messaging function on a smartphone

Exclusion criteria

Exclusion Criteria:

  • Clinical diagnosis of dementia
  • Clinical diagnosis of psychiatric disease
  • Currently participating in any type of psychological or behavioural intervention for NPSs
  • Currently taking psychiatric medication
  • Currently receiving acute care or post-acute hospitalization care
05

Study design

Phase
Not applicable
Primary purpose
Supportive care
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Outcomes assessor)
Enrollment
160 participants (estimated)

Study arms

  • Experimental
    Intervention group

    Participants in intervention group will receive the EMI for 9 weeks. Based on the steps of mobile message development recommended by Abroms, et al., our multidisciplinary team - including a neurologist, nurses, clinical psychologists and gerontologists - will develop an ACT message content library and protocol for IM delivery (i.e. EMI).

    Behavioral: automated instant message-guided neuropsychiatric symptoms management

  • Active comparator
    Control group

    The control group will receive instant messages about general mental health management from the HKSAR Government website in 9 weeks, which is open to the public (https://www.shallwetalk.hk/en/mental-well-being/mental-well-being-is-related-to-you/), with reminder text messages of follow-up surveys.

    Behavioral: general mental health management

Interventions

  • Behavioralautomated instant message-guided neuropsychiatric symptoms management

    Participants in intervention group will receive the EMI for 9 weeks. Based on the steps of mobile message development recommended by Abroms, et al., we will develop a message content library and protocol for EMI delivery.

  • Behavioralgeneral mental health management

    Participants in control group will receive the messages for 9 weeks. The control group will receive instant messages about general mental health management from the HKSAR Government website, which is open to the public (https://www.shallwetalk.hk/en/mental-well-being/mental-well-being-is-related-to-you/), with reminder text messages of follow-up surveys.

06

What researchers measure

Primary outcomes

  1. MBI-C scores

    The primary outcome will be MBI-C scores to assess NPSs. A higher MBI-C scores will indicate a higher level of neuropsychiatric symptoms.

    Time frame: at baseline, 10th week and 24th week

Secondary outcomes

  1. Depressive symptoms (PHQ-9)

    Each item was scored on a 4-point scale (0 "not at all" to 3 "nearly every day"). The total score is calculated by summing up the score of all items (range 0-27). High scores indicate worse depressive symptoms.

    Time frame: at baseline, 10th week and 24th week

  2. Anxiety symptoms (GAD-7)

    A 7-item scale with score ranging from 0 to 21, higher scores indicate higher severity of anxiety symptom

    Time frame: at baseline, 10th week and 24th week

  3. Quality of life (EuroQol 5-dimension 5-level questionnaire [EQ-5D-5L])

    The EQ-5D-5L assesses five health dimensions: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression, each rated on five levels of severity, with scores ranging from -0.864 to 1, where higher scores indicate better quality of life. Additionally, it includes a visual analogue scale (VAS), ranging from 0 (the worst health imaginable) to 100 (the best health imaginable).

    Time frame: at baseline, 10th week and 24th week

  4. Cognitive functions (HK-MoCA)

    The total score is calculated by summing up the score of all items. Higher scores indicate better cognitive function.

    Time frame: at baseline, 10th week and 24th week

  5. Acceptance of negative emotions and valued-based actions (AAQ-II)

    AAQ-II is a measure of psychological flexibility. Each item is rated on a 7-point scale from 1 = never true to 7 = always true. Scores range from 1-49. A lower score indicates a lower level of psychological flexibility.

    Time frame: at baseline, 10th week and 24th week

  6. Subjective Cognitive Decline scale (SCD-9)

    SCD-9 is a scale detecting subjective cognitive function. Higher socre indicate worse subjective cognitive function.

    Time frame: at baseline, 10th week and 24th week

07

Study locations

1 of 1 sites recruiting
  • The University of Hong Kong
    Hong Kong, Hong Kong
    • Doris Sau Fung Yu, PhD · Contact · dyu1@hku.hk · +852 3917 6319
    Recruiting
08

References and documents

Publications

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Individual participant data

Plan to share: No

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 18, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07420426
Lead sponsor
The University of Hong Kong
Responsible party
Prof. Yu, Doris Sau Fung (Professor, The University of Hong Kong) — Principal investigator
First posted
Feb 19, 2026
Start date
Dec 8, 2025
Primary completion
Dec 31, 2026 (estimated)
Completion
Dec 31, 2026 (estimated)
Last update
May 18, 2026

Study contacts

Doris Sau Fung Yu, Professor
Contact
dyu1@hku.hk
+852 3917 6319
Doris Sau Fung Yu, Professor
principal investigator · School of nursing, The University of Hong Kong

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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