Article Text

Metastatic prostate cancer men’s attitudes towards treatment of the local tumour and metastasis evaluative research (IP5-MATTER): protocol for a prospective, multicentre discrete choice experiment study
  1. Martin John Connor1,2,
  2. Mesfin G Genie3,4,
  3. Michael Gonzalez5,
  4. Naveed Sarwar5,
  5. Kamalram Thippu Jayaprakash6,7,
  6. Gail Horan6,
  7. Feargus Hosking-Jervis1,
  8. Natalia Klimowska-Nassar1,8,
  9. Johanna Sukumar1,8,
  10. Tzveta Pokrovska5,
  11. Dolan Basak5,
  12. Angus Robinson9,
  13. Mark Beresford10,
  14. Bhavan Rai11,
  15. Stephen Mangar5,
  16. Vincent Khoo12,
  17. Tim Dudderidge13,
  18. Alison Falconer5,
  19. Mathias Winkler1,2,
  20. Verity Watson3,
  21. Hashim Uddin Ahmed1,2
  1. 1Imperial Prostate, Divison of Surgery, Department of Surgery and Cancer, Imperial College London, London, UK
  2. 2Imperial Urology, Charing Cross Hospital, Imperial College Healthcare NHS Trust, London, UK
  3. 3Health Economics Research Unit (HERU), Faculty of Medicine, University of Aberdeen, Aberdeen, UK
  4. 4Economics, Ca’ Foscari University of Venice, Venezia, Italy
  5. 5Department of Oncology, Charing Cross Hospital, Imperial College Healthcare NHS Trust, London, UK
  6. 6Department of Oncology, Addenbrooke’s Hospital, Cambridge, UK
  7. 7Department of Oncology, Queen Elizabeth Hospital King’s Lynn NHS Foundation Trust, King’s Lynn, UK
  8. 8Imperial College Clinical Trials Unit (ICTU), Imperial College London, London, UK
  9. 9Department of Oncology, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK
  10. 10Department of Oncology, Royal United Hospitals Bath NHS Foundation Trust, Bath, UK
  11. 11Department of Urology, Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle Upon Tyne, UK
  12. 12Department of Oncology, The Royal Marsden NHS Foundation Trust and Institute of Cancer Research, London, UK
  13. 13Department of Urology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
  1. Correspondence to Dr Martin John Connor; m.connor{at}


Introduction Systemic therapy with androgen deprivation therapy (ADT) and intensification with agents such as docetaxel, abiraterone acetate and enzalutamide has resulted in improved overall survival in men with de novo synchronous metastatic hormone-sensitive prostate cancer (mHSPC). Novel local cytoreductive treatments and metastasis-directed therapy are now being evaluated. Such interventions may provide added survival benefit or delay the requirement for further systemic agents and associated toxicity but can confer additional harm. Understanding men’s preferences for treatment options in this disease state is crucial for patients, clinicians, carers and future healthcare service providers.

Methods Using a prospective, multicentre discrete choice experiment (DCE), we aim to determine the attributes associated with treatment that are most important to men with mHSPC. Furthermore, we plan to determine men’s preferences for, and trade-offs between, the attributes (survival and side effects) of different treatment options including systemic therapy, local cytoreductive approaches (external beam radiotherapy, cytoreductive radical prostatectomy or minimally invasive ablative therapy) and metastases-directed therapies (metastasectomy or stereotactic ablative body radiotherapy). All men with newly diagnosed mHSPC within 4 months of commencing ADT and WHO performance status 0–2 are eligible. Men who have previously consented to a cytoreductive treatment or have developed castrate-resistant disease will be excluded. This study includes a qualitative analysis component, with patients (n=15) and healthcare professionals (n=5), to identify and define the key attributes associated with treatment options that would warrant trade-off evaluation in a DCE. The main phase component planned recruitment is 300 patients over 1 year, commencing in January 2021, with planned study completion in March 2022.

Ethics and dissemination Ethical approval was obtained from the Health Research Authority East of England, Cambridgeshire and Hertfordshire Research Ethics Committee (Reference: 20/EE/0194). Project information will be reported on the publicly available Imperial College London website and the Heath Economics Research Unit (HERU website including the HERU Blog). We will use the social media accounts of IP5-MATTER, Imperial Prostate London, HERU and the individual researchers to disseminate key findings following publication. Findings from the study will be presented at national/international conferences and peer-reviewed journals. Authorship policy will follow the recommendations of the International Committee of Medical Journal Editors.

Trial registration number NCT04590976.

  • prostate disease
  • health economics
  • urological tumours
  • radiotherapy
  • surgery
  • radiation oncology

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See:

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  • VW and HUA are joint senior authors.

  • Twitter @connor_urol, @mesfin_genie, @KamalThippu

  • Contributors MJC, MG, FH-J, MW, VW, HUA contributed to conception and design of IP5-MATTER trial. All authors have read and approved the final manuscript.

  • Funding MJC’s research is support by University College London Hospitals (UCLH) Charity and the Wellcome Trust. Mesfin Genie and Verity Watson are based at the Health Economics Research Unit (HERU), University of Aberdeen. HERU is funded by the Chief Scientists Office of the Scottish Government Health and Social Care Directorate. KTJ acknowledges research grant from the UK National Institute of Health Research Clinical Research Network Eastern and has received educational grants from Bayer UK, Janssen Oncology, Pfizer, Roche, and Takeda. HUA’s research is supported by core funding from the United Kingdom’s National Institute of Health Research (NIHR) Imperial Biomedical Research Centre.

  • Competing interests HUA currently receives funding from the Wellcome Trust, Prostate Cancer UK, MRC (UK), Cancer Research UK, The Urology Foundation, BMA Foundation, Imperial Healthcare Charity, Sonacare, Trod Medical and Sophiris Biocorp for trials in prostate cancer. HUA was a paid medical consultant for Sophiris Biocorp, Sonacare and BTG in the past 3 years. He is currently a paid proctor for Sonacare and Boston.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.