Development of a Core Outcome Set for Effectiveness Studies of Functional Anorectal Pain (FAP-COS): An International Multi-Stakeholder Delphi Study Protocol

Background: Functional anorectal pain (FAP) is a common functional gastrointestinal disorder. FAP is characterized by chronic or recurrent pain in the anorectal region. The condition has no identifiable organic cause. Clinical trials of FAP interventions report different outcomes. This heterogeneity limits the comparison and synthesis of study results. A core outcome set (COS) for FAP has not been developed.

Methods: The development of the FAP-COS will include three phases. First, a systematic literature review will be conducted. The review will identify outcomes previously reported in effectiveness studies of FAP. A focus group discussion will be conducted with the study ‘s Patient and Public Involvement (PPI) group. Second, a Delphi survey will be conducted. The survey will prioritize outcomes for inclusion in the FAP-COS. Stakeholders will include colorectal surgeons, gastroenterologists, pain specialists, rehabilitation physicians, acupuncturists, traditional Chinese medicine practitioners, and patients. Finally, a consensus meeting will be held. The meeting will ratify the FAP-COS.

Discussion: The FAP-COS is expected to be collected in all clinical trials, audits of practice, and other research concerning FAP. This will facilitate the comparison and synthesis of studies. The goal is to improve outcomes for patients with FAP.

Contributors

Wenhui Huang, Hong Lu, Yin Qu
Department of Anorectal Surgery
Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine

Further Study Information

Current Stage: Ongoing
Date: October 2026 - August 2027
Funding source(s): This study is funded by an intramural grant from Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine (grant No: SG-4034). The funder has no role in study design, data collection, analysis, interpretation, or manuscript preparation.


Health Area

Disease Category: Anaesthesia & pain control

Disease Name: Functional Anorectal Pain

Target Population

Age Range: 18 - 65

Sex: Either

Nature of Intervention: Complementary and alternative medicine (CAM) therapy, Drug, Physical, Procedure, Psychological & behavioural, Traditional Chinese Medicine

Stakeholders Involved

- Clinical experts
- Conference participants
- Ethicists
- Patient/ support group representatives
- Researchers

Study Type

- COS for clinical trials or clinical research

Method(s)

- Consensus conference
- Consensus meeting
- Delphi process
- Focus group(s)
- Interview
- Literature review

The development of the FAP-COS will include three phases. First, a systematic literature review will be conducted. The review will identify outcomes previously reported in effectiveness studies of FAP. A focus group discussion will be conducted with the study ‘s Patient and Public Involvement (PPI) group. Second, a Delphi survey will be conducted. The survey will prioritize outcomes for inclusion in the FAP-COS. Stakeholders will include colorectal surgeons, gastroenterologists, pain specialists, rehabilitation physicians, acupuncturists, traditional Chinese medicine practitioners, and patients. Finally, a consensus meeting will be held. The meeting will ratify the FAP-COS.

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