What the study found
The study found that a layered patient and public involvement and engagement (PPIE) strategy gave the RETURN dental trial a more inclusive and meaningful form of involvement than a single approach would likely have provided. Different layers contributed different kinds of input, and together they broadened participation across the socio-economic spectrum.
Why the authors say this matters
The authors conclude that layered approaches can strengthen inclusivity in health inequalities research by combining multiple forms of involvement for different purposes and stages of a study. They also say this can help move beyond tokenism and support meaningful, context-sensitive involvement.
What the researchers tested
The paper presents a case study from the RETURN dental study. The researchers embedded a layered PPIE strategy that included a lay researcher, a patient reference group, a community advisory group, and grassroots engagement activities, with both one-off and long-term forms of involvement.
What worked and what didn't
More than 300 PPIE collaborators contributed to developing the study, including co-producing the intervention and patient-facing materials, refining patient information sheets and questionnaires, advising on recruitment, and supporting dissemination. The abstract says each layer contributed distinct input, and that differing perspectives across layers provided valuable insights. It also notes that each layer had different contributions, challenges, and lessons learned, but it does not describe specific failures in detail.
What to keep in mind
This is a case study from one dental trial, so the abstract does not show how the approach would perform in all research settings. The abstract does not give detailed quantitative comparisons between the layered strategy and a single-layer approach, and it does not list specific limitations beyond noting differing challenges across layers.
Key points
- The RETURN dental study used a layered PPIE strategy rather than a single involvement group.
- The approach included a lay researcher, a patient reference group, a community advisory group, and grassroots engagement activities.
- More than 300 PPIE collaborators helped shape the study, including materials, questionnaires, recruitment, and dissemination.
- The authors say the layered approach was more inclusive and meaningful than a single layer alone.
- The abstract says different layers brought different perspectives, challenges, and lessons learned.
Disclosure
- Research title:
- Layered patient involvement broadened inclusion in a dental trial
- Authors:
- V. Lowers, M. Stanley, J. Hennessy, E. Morgan, R. Horsley, J. Vithlani, R. M. Harris
- Institutions:
- House of Representatives, House of Representatives, House of Representatives, University of Liverpool, University of Liverpool, University of Liverpool, University of Liverpool
- Publication date:
- 2026-03-07
- OpenAlex record:
- View
Get the weekly research newsletter
Stay current with scholarly research without reading academic papers — one filtered digest, every Friday.