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Quality of Life Research

, Volume 28, Issue 4, pp 955–962 | Cite as

Trials with proxy-reported outcomes registered on the Australian New Zealand Clinical Trials Registry (ANZCTR)

  • Rebecca Mercieca-BebberEmail author
  • Douglas Williams
  • Margaret-Ann Tait
  • Claudia Rutherford
  • Lucy Busija
  • Natasha Roberts
  • Michelle Wilson
  • Chindhu Shunmuga Sundaram
  • Jessica Roydhouse
  • the International Society for Quality of Life Research (ISOQOL) Australia and New Zealand Special Interest Group
Brief Communication

Abstract

Aims

A proxy is someone other than a patient who reports a patient’s outcomes as if they are the patient. Due to known discordance with patient reports, proxies are often not recommended in clinical trials; however, proxies may be needed in certain research contexts. We aimed to identify and describe trials registered on the Australian New Zealand Clinical Trials Registry (ANZCTR) with proxy-reported endpoints.

Methods

ANZCTR was systematically searched from inception (2005) to 31 March 2017 for trials with proxy-reported endpoints. Primary and secondary endpoints for each trial retrieved by the search were individually coded (proxy-reported: yes/no), and trials with confirmed proxy-reported endpoints were included in the analysis.

Results

Of 13,666 registered trials, 469 (3.4%) included a proxy-reported endpoint (867 individual proxy-reported endpoints in total: 62% family member proxy, 22% health professional). Proxy endpoint inclusion did not significantly increase over time (r = 0.18, p = 0.59). Mental health (11.5%), stroke (10.3%) and neurological (8.3%) trials had the highest proportion of trials using proxies. Of the 469 trials, 123 (26.2%) studies involved paediatric patients.

Discussion

Proxy-reported endpoints are included in a small but notable number of studies, which may indicate other types of outcomes are used for patients unable to self-report, or that these patients are under-researched.

Keywords

Proxy-reported outcomes Quality of life Clinical trial registration Clinical trial endpoint Outcome measures 

Notes

Acknowledgements

We acknowledge ANZCTR for providing access to the study data, and thank Kylie Hunter (ANZCTR) for in-kind support, Ailsa Langford and Thuyen Vu (ANZCTR) for assistance with the search strategy and data retrieval. We also thank Elizabeth Vodicka, Beth Devine and colleagues for sharing the search terms used in the review of clinicaltrials.gov.

Compliance with ethical standards

Conflict of interest

The authors declare no conflicts of interest.

Ethical approval

The University of Sydney Human Research Ethics Committee does not review studies that do not include human participants and therefore human research ethics approval was not required for this study.

Informed consent

We obtained permission from the ANZCTR to conduct this research. No human research participants were involved in this study, therefore informed consent was not required.

Research involving human and animal participants

In accordance with the University of Sydney’s (sponsor) ethical procedures, this research did not include human research participants and therefore human research ethics approval was not required. The data included in this study are publically available on ANZCTR and concerns clinical trial information. No human data were included in this analysis.

Supplementary material

11136_2018_2080_MOESM1_ESM.docx (29 kb)
Supplementary material 1 (DOCX 29 KB)

References

  1. 1.
    Food and Drug Administration. (2009). Guidance for industry: Patient-reported outcome measures: use in medical product development to support labelling claims. Retrieved from http://www.fda.gov/downloads/Drugs/Guidances/UCM193282.pdf.
  2. 2.
    Todorov, A., & Kirchner, C. (2000). Bias in proxies’ reports of disability: Data from the National Health Interview Survey on disability. American Journal of Public Health, 90(8), 1248–1253.CrossRefPubMedPubMedCentralGoogle Scholar
  3. 3.
    Lal, S. D., McDonagh, J., Baildam, E., Wedderburn, L. R., Gardner-Medwin, J., Foster, H. E., et al. (2011). Agreement between proxy and adolescent assessment of disability, pain, and well-being in juvenile idiopathic arthritis. The Journal of Pediatrics, 158(2), 307–312.CrossRefPubMedPubMedCentralGoogle Scholar
  4. 4.
    European Medicines Agency. (2016). Appendix 2 to the guideline on the evaluation of anticancer medicinal products in man: The use of patient-reported outcome (PRO) measures in oncology studies. London, UK.Google Scholar
  5. 5.
    European Medicines Agency Oncology Working Party. (2014). Draft reflection paper on the use of patient reported outcome (PRO) measures in oncology studies.Google Scholar
  6. 6.
    Bausewein, C., Daveson, B. A., Currow, D. C., Downing, J., Deliens, L., Radbruch, L., et al. (2016). EAPC White Paper on outcome measurement in palliative care: Improving practice, attaining outcomes and delivering quality services—recommendations from the European Association for Palliative Care (EAPC) Task Force on Outcome Measurement. Palliative Medicine, 30(1), 6–22.CrossRefPubMedGoogle Scholar
  7. 7.
    World Health Organization. (2014). International Clinical Trials Registry Platform (ICTRP). Retrieved from http://www.who.int/ictrp/en/.
  8. 8.
    Mercieca-Bebber, R., Williams, D., Tait, M. A., Roydhouse, J., Busija, L., Sundaram, C. S., et al. (2018). Trials with patient-reported outcomes registered on the Australian New Zealand Clinical Trials Registry (ANZCTR). Quality of Life Research, 27(10), 2581–2591.CrossRefPubMedGoogle Scholar
  9. 9.
    Australian New Zealand Clinical Trials Registry. (2017). ANZCTR data field explanation.Google Scholar
  10. 10.
    Australian New Zealand Clinical Trials Registry. Statistics to the end of March 2017. Retrieved from http://www.anzctr.org.au/docs/Monthly%20Website%20Reporting_Statistics.pdf?t=139.
  11. 11.
    Hounsome, N., Orrell, M., & Edwards, R. T. (2011). EQ-5D as a quality of life measure in people with dementia and their carers: Evidence and key issues. Value Health, 14(2), 390–399.CrossRefPubMedGoogle Scholar
  12. 12.
    Rand, S. E., & Caiels, J. (2015). Using proxies to assess quality of life: A review of the issues and challenges. Discussion paper. Quality and Outcomes of person-centred care policy Research Unit (QORU). University of Kent.Google Scholar
  13. 13.
    Jones, J. M., McPherson, C. J., Zimmermann, C., Rodin, G., Le, L. W., & Cohen, S. R. (2011). Assessing agreement between terminally ill cancer patients’ reports of their quality of life and family caregiver and palliative care physician proxy ratings. Journal of Pain and Symptom Management, 42(3), 354–365.CrossRefPubMedGoogle Scholar
  14. 14.
    Steel, J. L., Geller, D. A., & Carr, B. I. (2005). Proxy ratings of health related quality of life in patients with hepatocellular carcinoma. Quality of Life Research, 14(4), 1025–1033.CrossRefPubMedGoogle Scholar
  15. 15.
    Matza, L. S., Patrick, D. L., Riley, A. W., Alexander, J. J., Rajmil, L., Pleil, A. M., et al. (2013). Pediatric patient-reported outcome instruments for research to support medical product labeling: Report of the ISPOR PRO good research practices for the assessment of children and adolescents task force. Value Health, 16(4), 461–479.CrossRefPubMedGoogle Scholar
  16. 16.
    Varni, J. W. (2018). The PedsQL measurement model for the pediatric quality of life inventory. Retrieved from http://www.pedsql.org/about_pedsql.html.
  17. 17.
    Patient Reported Outcome Measurement Information System (PROMIS). (2018). List of pediatric measures. Retrieved from http://www.healthmeasures.net/explore-measurement-systems/promis/intro-to-promis/list-of-pediatric-measures.
  18. 18.
    KIDSCREEN. (2018). Questionnaires. Retrieved from https://www.kidscreen.org/english/questionnaires/.
  19. 19.
    Varni, J. W., Magnus, B., Stucky, B. D., Liu, Y., Quinn, H., Thissen, D., et al. (2014). Psychometric properties of the PROMIS® pediatric scales: Precision, stability, and comparison of different scoring and administration options. Quality of Life Research, 23(4), 1233–1243.CrossRefPubMedGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Rebecca Mercieca-Bebber
    • 1
    • 2
    • 3
    Email author
  • Douglas Williams
    • 2
  • Margaret-Ann Tait
    • 2
  • Claudia Rutherford
    • 2
    • 4
  • Lucy Busija
    • 5
  • Natasha Roberts
    • 6
    • 7
  • Michelle Wilson
    • 8
    • 9
  • Chindhu Shunmuga Sundaram
    • 2
  • Jessica Roydhouse
    • 10
  • the International Society for Quality of Life Research (ISOQOL) Australia and New Zealand Special Interest Group
  1. 1.NHMRC Clinical Trials CentreUniversity of SydneyCamperdownAustralia
  2. 2.Faculty of Science, School of PsychologyUniversity of SydneyCamperdownAustralia
  3. 3.Faculty of Medicine, Sydney Medical School, Central Clinical SchoolUniversity of SydneyCamperdownAustralia
  4. 4.Cancer Nursing Research Unit (CNRU), Sydney Nursing SchoolUniversity of SydneyCamperdownAustralia
  5. 5.Biostatistics Group, Department of Epidemiology and Preventive MedicineMonash UniversityMelbourneAustralia
  6. 6.Royal Brisbane and Women’s Hospital (RBWH)HerstonAustralia
  7. 7.Queensland University of Technology (QUT)BrisbaneAustralia
  8. 8.Auckland City HospitalAucklandNew Zealand
  9. 9.University of AucklandAucklandNew Zealand
  10. 10.Department of Health Services, Policy & PracticeBrown University School of Public HealthProvidenceUSA

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