Empowering older people to make informed vaccine decisions

Empowering Older People's Preventive Care Utilization Through Mental Model Approach and Patient Activation Approach: a Randomized Control Trial for Promoting Vaccination Uptake

NA · The University of Hong Kong · NCT05691790

This study is testing ways to help older adults, aged 70 and up, feel more confident in making decisions about getting important vaccines like the flu shot and COVID-19 vaccine.

Quick facts

PhaseNA
Study typeInterventional
Enrollment270 (estimated)
Ages70 Years and up
SexAll
SponsorThe University of Hong Kong (other)
Locations1 site (Hong Kong, China)
Trial IDNCT05691790 on ClinicalTrials.gov

What this trial studies

This clinical trial aims to enhance the decision-making abilities of older adults regarding recommended vaccinations, including seasonal influenza, pneumococcal, and COVID-19 vaccines. Utilizing a two-arm randomized control design, the study will implement interventions based on the Mental Models Approach and Patient Activation Approach to boost participants' confidence and self-efficacy in managing their health. Participants will be community-dwelling individuals aged 70 and above who have not consistently received vaccinations in recent years. Data will be collected through questionnaires at baseline and follow-up intervals of one and four months post-intervention.

Who should consider this trial

Good fit: Ideal candidates for this study are community-dwelling older adults aged 70 years or older who have not received recommended vaccinations in the past three years.

Not a fit: Patients with psychiatric disorders, dementia, or other cognitive difficulties that impede communication or understanding will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could significantly increase vaccination rates among older adults, leading to improved health outcomes and reduced healthcare burdens.

How similar studies have performed: Previous studies have shown success in using similar approaches to enhance health communication and vaccination uptake among older populations.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Community-dwelling older persons aged 70 years who did not persistently receive seasonal influenza vaccine over the past three years (2020-2022) and/or have never received the pneumococcal vaccine (one dose of the 23-valent pneumococcal polysaccharide vaccine (23vPPV) or the 13-valent pneumococcal conjugate vaccine (PCV13)).
* Being able to communicate with Cantonese, or Mandarin (the two main spoken language in Hong Kong) and being able to read Chinese.
* Inclusion criteria for the informant include age above 18 and can understand Cantonese or Mandarin

Exclusion Criteria:

* having psychiatric disorders, dementia, or other cognitive difficulties which impede communication or understanding of the intervention and having functional disabilities which impede access to health care services.
* subjects who had medical contraindications for immunization.

Where this trial is running

Hong Kong, China

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Health Communication, Older people, Preventive care, Vaccine decision-making

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.