There has been a lot of research on why patients should be involved in improving research. The arguments usually sound convincing — but they often miss the real point. Here are the four most common reasons, and the reason that I think should always be mentioned first. I have also added some scientific references at the end in case you want to dive deeper.

Reason 1: It’s the morally and ethically right thing to do

The literature repeatedly frames patient involvement as an ethical obligation. It respects autonomy, promotes justice, values lived experience, and strengthens accountability. Instead of treating patients as passive subjects, involvement recognises them as partners with a legitimate claim to influence research that affects their lives. It also fits democratic ideals: publicly funded research should be transparent, fair, and responsive to those it serves.

All true.
But ethics alone rarely changes research practice.

Reason 2: It improves research design

When patients help shape questions and protocols, studies tend to become more relevant and feasible. Patient input can sharpen outcome selection, clarify consent materials, refine inclusion criteria, and reveal practical burdens researchers miss. Involving patients early makes studies look less elegant on paper — but more workable in reality.

Good design is a strong argument.
Still, it doesn’t explain why patient input makes design better in the first place.

Reason 3: It improves participant recruitment and retention

Patient involvement can make studies clearer, more acceptable, and more trustworthy. When study materials reflect patient perspectives, people are more willing to enrol and stay engaged. Collaboration also signals partnership rather than extraction, which strengthens trust — and trust drives participation.

Useful, yes.
But recruitment is a downstream effect, not the core reason.

Reason 4: It improves value for money

Studies that ignore patient realities are more likely to struggle with recruitment, require redesign, or produce findings that never get implemented. Involving patients early can reduce waste, improve efficiency, and increase the chance that research investments actually lead to change.

This argument resonates with funders.
But it still treats involvement as a tool for optimisation, not as a core part of knowledge production.

Reason 5: Patients have knowledge researchers don’t

Here’s the real reason.

Patients and researchers don’t just have different views — they have different epistemic positions. Researchers are trained to generate analytic, comparative, and generalisable knowledge from the outside. Patients develop situated, embodied, and longitudinal expertise from the inside. They know how illness unfolds over time, how treatments collide with everyday life, how systems behave in practice, and how decisions are made under real constraints.

This isn’t anecdotal input. It’s operational knowledge of how health and care actually work.

When that knowledge is missing, research often rests on assumptions that seem reasonable to professionals but fail in real life. When it’s present, studies are more realistic, interpretations make more sense, and implementation becomes possible.

The reason patient involvement improves research is not primarily ethical, financial, or procedural.
It’s epistemic.

Conclusion

Ethics, design quality, recruitment, and efficiency are all good reasons to involve patients. But they are secondary. The fundamental reason is that research improves when it integrates both outside analytic expertise and inside lived expertise. Without that combination, we risk producing studies that are methodologically sound — and practically wrong.

(Secondary) patient involvement isn’t mainly about being nice, fair, or efficient — it’s about fixing a knowledge gap in research that only patients can fill.

References

• Beresford, P., & Russo, J. (2020). Patient and public involvement in research. In Achieving Person-Centred Health Systems.
• Boivin, A., Richards, T., Forsythe, L., Grégoire, A., L’Espérance, A., Abelson, J., & Carman, K. (2018). Evaluating patient and public involvement in research. BMJ, 363. 
• Domecq JP, Prutsky G, Elraiyah T, Wang Z, Nabhan M, Shippee N. Patient engagement in research: a systematic review. BMC Health ServRes. 2014;14.14
• Dumez, V. and A. L’Espérance, “Beyond experiential knowledge: a classification of patient knowledge,” Soc Theory Health, Jun. 2024,
• Frank L, Basch E, Selby JV, Patient-Centered Outcomes Research I. The PCORI perspective on patient-centered outcomes research. JAMA. 2014;312:1513-1514.13. 
• Hoos A, Anderson J, Boutin M, et al. Partnering with patients in the development and lifecycle of medicines: a call for action. TherapeuticInnovation & Regulatory Science. 2015;49:929-939.
• Levitan B, Getz K, Eisenstein EL, et al. Assessing the Financial Value of Patient Engagement: A Quantitative Approach from CTTI’s Patient Groups and Clinical Trials Project. Ther Innov Regul Sci. 2017.
• Røssvoll, T. B., Rosenvinge, J., Liabo, K., Hanssen, T. A., & Pettersen, G. (2023). Patient and public involvement in health research from researchers’ perspective. Health Expectations, 26, 2525–2531.
• Sacristán, J. A., Aguaron, A., Avendaño-Solá, C., Garrido, P., Carrión, J., Gutiérrez, A., Kroes, R., & Flores, A. (2016). Patient involvement in clinical research: why, when, and how. Patient Preference and Adherence, 10, 631–640.
• Smith MY, Hammad TA, Metcalf M, et al. Patient engagement at a tipping point—the need for cultural change across patient, sponsor, and regulator stakeholders: insights from the DIA Conference, “Patient Engagement in Benefit Risk Assessment Throughout the Life Cycle ofMedical Products.” Therapeutic Innovation & Regulatory Science. 2016;50:546-553
• Staley K, Minogue V. User involvement leads to more ethically sound research. Clin Ethics. 2006;1:95-100.12.