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Can the General Public Be a Proxy for an “At-Risk†Group in a Patient Preference Study? A Disease Prevention Example in Rheumatoid Arthritis

Author

Listed:
  • R. L. DiSantostefano

    (Janssen Research & Development, Titusville, NJ, USA)

  • G. Simons

    (Rheumatology Research Group, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK)

  • M. Englbrecht

    (freelance healthcare data scientist, Eckental, Germany
    Department of Internal Medicine and Institute for Clinical Immunology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany)

  • Jennifer H. Humphreys

    (Centre for Epidemiology Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
    Kellgren Centre for Rheumatology, Manchester University NHS Foundation Trust, Manchester, UK)

  • Ian N. Bruce

    (Centre for Epidemiology Versus Arthritis, Centre for Musculoskeletal Research, Manchester Academic Health Science Centre, The University of Manchester, Manchester, UK
    Kellgren Centre for Rheumatology, Manchester University NHS Foundation Trust, Manchester, UK
    NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK)

  • K. Schölin Bywall

    (Mälardalen University, Vasteras, Västmanland, SE)

  • C. Radawski

    (Eli Lilly and Company, Indianapolis, IN, USA)

  • K. Raza

    (Rheumatology Research Group, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK
    Department of Rheumatology, Sandwell and West Birmingham NHS Trust, Birmingham, UK
    MRC Versus Arthritis Centre for Musculoskeletal Ageing Research and Research into Inflammatory Arthritis Centre Versus Arthritis, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK)

  • M. Falahee

    (Rheumatology Research Group, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK)

  • J. Veldwijk

    (School of Health Policy & Management, Erasmus University Rotterdam, Rotterdam, the Netherlands
    Erasmus Choice Modelling Centre, Erasmus University Rotterdam, Rotterdam, the Netherlands
    Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, the Netherlands)

Abstract

Background When selecting samples for patient preference studies, it may be difficult or impractical to recruit participants who are eligible for a particular treatment decision. However, a general public sample may not be an appropriate proxy. Objective This study compares preferences for rheumatoid arthritis (RA) preventive treatments between members of the general public and first-degree relatives (FDRs) of confirmed RA patients to assess whether a sample of the general public can be used as a proxy for FDRs. Methods Participants were asked to imagine they were experiencing arthralgia and had screening tests indicating a 60% chance of developing RA within 2 yrs. Using a discrete choice experiment, participants were offered a series of choices between no treatment and 2 unlabeled hypothetical treatments to reduce the risk of RA. To assess data quality, time to complete survey sections and comprehension questions were assessed. A random parameter logit model was used to obtain attribute-level estimates, which were used to calculate relative importance, maximum acceptable risk (MAR), and market shares of hypothetical preventive treatments. Results The FDR sample ( n  = 298) spent more time completing the survey and performed better on comprehension questions compared with the general public sample ( n  = 982). The relative importance ranking was similar between the general public and FDR participant samples; however, other relative preference measures involving weights including MARs and market share differed between groups, with FDRs having numerically higher MARs. Conclusion In the context of RA prevention, the general public (average risk) may be a reasonable proxy for a more at-risk sample (FDRs) for overall relative importance ranking but not weights. The rationale for a proxy sample should be clearly justified. Highlights Participants from the general public were compared to first-degree relatives on their preferences for rheumatoid arthritis (RA) preventive treatments using a discrete choice experiment. Preferences were similar between groups in terms of the most important and least important attributes of preventive treatments, with effectiveness being the most important attribute. However, relative weights differed. Attention to the survey and predicted market shares of hypothetical RA preventive treatments differed between the general public and first-degree relatives. The general public may be a reasonable proxy for an at-risk group for patient preferences ranks but not weights in the disease prevention context; however, care should be taken in sample selection for patient preference studies when choosing nonpatients.

Suggested Citation

  • R. L. DiSantostefano & G. Simons & M. Englbrecht & Jennifer H. Humphreys & Ian N. Bruce & K. Schölin Bywall & C. Radawski & K. Raza & M. Falahee & J. Veldwijk, 2024. "Can the General Public Be a Proxy for an “At-Risk†Group in a Patient Preference Study? A Disease Prevention Example in Rheumatoid Arthritis," Medical Decision Making, , vol. 44(2), pages 189-202, February.
  • Handle: RePEc:sae:medema:v:44:y:2024:i:2:p:189-202
    DOI: 10.1177/0272989X231218265
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    References listed on IDEAS

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    1. Mickael Bech & Dorte Gyrd‐Hansen, 2005. "Effects coding in discrete choice experiments," Health Economics, John Wiley & Sons, Ltd., vol. 14(10), pages 1079-1083, October.
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