Trial reportJournal of medical Internet research2026
Optimizing Web Links Used in Digital Vaccination Invitations to Raise Trust and Booking Intention: 3 Online Randomized Controlled Trials.
Trial report in Journal of medical Internet research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: People are encouraged to respond swiftly to digital health invitations, but they can be (rightly) skeptical about their legitimacy. Objective: Drawing on digital communication theory and psychological science, we hypothesized that easy-to-read web links that facilitate participants' ability to identify the health organization as the website host would improve trust in and user engagement with digital communications. Methods: In 3 double-blind, randomized online experiments, adult UK residents were recruited via the online platform Prolific (experiment 1: N Results: Across experiments, the control web link was poorly perceived, with most participants (729/1142, 63%) unsure or unlikely to use it. Relative to the control web link, the clear web link improved trust (β coefficient Conclusions: We extend digital communication research by investigating how web link design can reduce people's justified suspicion in health messaging. Moving beyond the previous research focus on health message content, we experimentally test the role of web link wording. We bring causal evidence that easier-to-read links that have easy-to-identify host health institutions increased trust and intention to use the link. We provide simple, practical design guidance to improve real-world engagement with digital health communications.
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