Patient-Centred Outcome Measures after Major Surgery (P-COMMaS)

P-COMMaS Logo Square


P-COMMaS (Patient-Centred Outcome Measures after Major Surgery) is a multi-centre mixed methods study funded by the AAGBI and University College London Hospitals (UCLH) seeking to explore the question: 'Which outcomes matter most to patients after major surgery?'

We will use a short survey and in-depth interviews to gather views from patients and carers with experience of major surgery, and clinicians involved in all aspects of perioperative care.

The results of P-COMMaS will inform the NIAA's development of Core Outcome Measures for Perioperative and Anaesthetic Care (COMPAC).


Perioperative clinical effectiveness research is all about improving outcomes for patients. Choosing outcomes that genuinely matter to both the 'users' of healthcare (patients and carers) and the clinicians who provide it should therefore be a basic starting point for perioperative trials. However, surprisingly little work has been done to date exploring patients', carers' and clinicians' views about what constitute important outcomes.

Most perioperative trials still focus on outcome measures chosen by researchers, such as length of hospital stay, and various types of post-operative morbidity. However, patient-centred outcomes - which simply means 'outcomes that are relevant and important to patients' - may encompass a range of other aspects of life after surgery that traditional, researcher-chosen outcome measures do not adequately capture.

SURVEY: What matters to patients having major surgery?

Recruitment is now closed and the results will be published in due course. Thank you for your interest

 P-COMMaS PIS (Clinicians).docx (289 KB)
 P-COMMaS PIS (Patients).docx (278 KB)

Study Documentation

 P-COMMaS Lay summary.docx (351 KB)
 P-COMMaS Protocol Final_Signed.docx (362 KB)

P-COMMaS is generously supported by:

For more information, please contact:
Dr Oliver Boney, COMPAC Research Fellow
Surgical Outcomes Research Centre
University College London Hospitals NHS Foundation Trust
London NW1 2BU