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01-04-2013

Methods for interpreting change over time in patient-reported outcome measures

Auteurs: K. W. Wyrwich, J. M. Norquist, W. R. Lenderking, S. Acaster, the Industry Advisory Committee of International Society for Quality of Life Research (ISOQOL)

Gepubliceerd in: Quality of Life Research | Uitgave 3/2013

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Abstract

Purpose

Interpretation guidelines are needed for patient-reported outcome (PRO) measures’ change scores to evaluate efficacy of an intervention and to communicate PRO results to regulators, patients, physicians, and providers. The 2009 Food and Drug Administration (FDA) Guidance for Industry Patient-Reported Outcomes (PRO) Measures: Use in Medical Product Development to Support Labeling Claims (hereafter referred to as the final FDA PRO Guidance) provides some recommendations for the interpretation of change in PRO scores as evidence of treatment efficacy.

Methods

This article reviews the evolution of the methods and the terminology used to describe and aid in the communication of meaningful PRO change score thresholds.

Results

Anchor- and distribution-based methods have played important roles, and the FDA has recently stressed the importance of cross-sectional patient global assessments of concept as anchor-based methods for estimation of the responder definition, which describes an individual-level treatment benefit. The final FDA PRO Guidance proposes the cumulative distribution function (CDF) of responses as a useful method to depict the effect of treatments across the study population.

Conclusions

While CDFs serve an important role, they should not be a replacement for the careful investigation of a PRO’s relevant responder definition using anchor-based methods and providing stakeholders with a relevant threshold for the interpretation of change over time.
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Metagegevens
Titel
Methods for interpreting change over time in patient-reported outcome measures
Auteurs
K. W. Wyrwich
J. M. Norquist
W. R. Lenderking
S. Acaster
the Industry Advisory Committee of International Society for Quality of Life Research (ISOQOL)
Publicatiedatum
01-04-2013
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 3/2013
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-012-0175-x