A randomized controlled trial of a web-based patient decision aid for COVID-19 vaccination among adults in Canada

Three-arm randomized controlled trial of a bilingual web-based patient decision aid for adults in Canada making COVID-19 vaccination decisions

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN91743566

Enrollment

1050

Registered

2025-12-16

Start date

2025-12-16

Completion date

Unknown

Last updated

2026-06-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

COVID-19 vaccination decision-making Other

Interventions

The study is a Randomized Controlled Trial (RCT) with three parallel arms. Participants are allocated 1:1:1 to one of the three arms via electronic simple randomization concealed within Qualtrics. Arm

participants are aware of their assignment, but data analysts will be blinded to the identity of the study arms during statistical analysis.

Eligibility

Sex/Gender

All

Age

18 Years to 99 Years

Inclusion criteria

Inclusion criteria: 1. Adults (=18 years) living in Canada 2. Able to provide free and informed consent 3. Able to read and understand French or English 4. Able to use a computer, tablet, or smartphone with internet access 5. Eligible for a COVID-19 vaccination booster dose

Exclusion criteria

Exclusion criteria: 1. Younger than 18 years of age 2. Unable to provide free and informed consent 3. Difficulty understanding or answering questions in English or French 4. Difficulty using a computer, tablet, or smartphone with internet access 5. No remaining decisions to make about COVID-19 vaccination; previous participation in this study

Countries

Canada

Contacts

Public ContactHolly Witteman

holly.witteman@fmed.ulaval.ca+1 418-656-2131

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Jun 29, 2026