A Core Outcome Set for Peer-to-Peer Support Interventions across Patient Populations and Healthcare Settings

This study aims to develop a Core Outcome Set (COS) for peer-to-peer support interventions for patients and parents of patients across healthcare settings. Using a systematic, multi-stakeholder approach involving patients, caregivers, healthcare professionals, and researchers, we will identify and prioritize outcomes considered most relevant. The resulting COS will support standardized outcome reporting and facilitate evaluation, comparison, and implementation of peer support interventions in clinical practice and research.

Contributors

1. D. van der Heijden (MD, Researcher / Project Lead) - St. Antonius hospital
2. M. Alsem (MD PhD, Wilhelmina Kinderziekenhuis)
3 E. Postma (MD PhD, St. Antonius Ziekenhuis)
4 E. Verreck (MD Diakonessenhuis / Erasmus MC)
5. M. Verkooijen (MD PhD) Radboudumc
6 F. Tijssens (MD)
7. J. Ruiterkamp (MD PhD,Wilhelmina Kinderziekenhuis)
8. M. Ketelaar (PhD, UMC Utrecht)
9. J. Zinkstok (MD PhD, RadboudMC)
10.P. Kies (MD PhD, LUMC)

Further Study Information

Current Stage: Ongoing
Date: May 2026 - May 2027
Funding source(s):


Health Area

Disease Category: Other

Disease Name: N/A

Target Population

Age Range: 18 - 100

Sex: Either

Nature of Intervention: Other

Stakeholders Involved

- Clinical experts
- Families
- Patient/ support group representatives

Study Type

- COS for clinical trials or clinical research

Method(s)

- Consensus meeting
- Delphi process
- Systematic review

This COS will be developed in three phases. First, a systematic literature search across PubMed, Embase, CINAHL, and PsycINFO will identify all outcomes reported in peer-to-peer support research. Second, a two-round online Delphi survey will be conducted among three stakeholder groups — patients and caregivers, healthcare professionals, and researchers — to rate the importance of identified outcomes on a 9-point scale. Consensus is defined as =70% of participants rating an outcome as critically important (score 7–9). Third, a multistakeholder consensus meeting will finalize the COS based on Delphi results.

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