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From Meaningful Outcomes to Meaningful Change Thresholds: A Path to Progress for Establishing Digital Endpoints

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Abstract

This paper examines the use of digital endpoints (DEs) derived from digital health technologies (DHTs), focusing primarily on the specific considerations regarding the determination of meaningful change thresholds (MCT). Using DHTs in drug development is becoming more commonplace. There is general acceptance of the value of DHTs supporting patient-centric trial design, capturing data outside the traditional clinical trial setting, and generating DEs with the potential to be more sensitive to change than conventional assessments. However, the transition from exploratory endpoints to primary and secondary endpoints capable of supporting labeling claims requires these endpoints to be substantive with reproducible population-specific values. Meaningful change represents the amount of change in an endpoint measure perceived as important to patients and should be determined for each digital endpoint and given population under consideration. This paper examines existing approaches to determine meaningful change thresholds and explores examples of these methodologies and their use as part of DE development: emphasizing the importance of determining what aspects of health are important to patients and ensuring the DE captures these concepts of interest and aligns with the overarching endpoint strategy. Examples are drawn from published DE qualification documentation and responses to qualification submissions under review by the various regulatory authorities. It is the hope that these insights will inform and strengthen the development and validation of DEs as drug development tools, particularly for those new to the approaches to determine MCTs.

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There are no data to share outside of the manuscript. All information is already contained in the manuscript, including supplemental material.

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Acknowledgements

This manuscript was developed by the DIA Meaningful Change Working Group, a cross-community collaboration between the Study Endpoints, Statistics & Data Sciences, and Clinical Research Communities. This working group has four workstreams focused on developing a unifying framework of meaningful change terminology and glossary of terms (workstream 1), examining evidentiary expectations and potential uses of meaningful change data among various stakeholders (workstream 2), facilitating a clear path forward for establishing thresholds for robust measurement of meaningful change (workstream 3) and exploring how to define, measure and interpret meaningful change data with digital endpoints (workstream 4). This manuscript is part of workstream 4.Thanks to Working Group 1 for their assistance in the alignment of the terminology used in the manuscript; Emuella Flood, Jammbe Musoro, Bellinda King-Kallimanis, Benoit Arnould, Celeste Elash, Sandra Nolte, Caroline Ward, and Sonya Eremenco. A very special thanks to Matthew Reaney, Cheryl D Coons, and Helen Doll for their detailed manuscript review, edits, and support.

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MMCC, KB, PMB, CD, NK, JB, NP, and WH contributed equally to the conception of this manuscript. MMcC, KB, PG, CD, and JC drafted and revised different versions of the manuscript. MMcC, KB, PMB, NK, CD, JC, and JB reviewed the manuscript. MMCC, KB, JC, NK, PMB, CD, W-HC approved the final version.

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Correspondence to Marie Mc Carthy.

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M Mc Carthy is an employee of Novartis Ireland Ltd and may own company stock. Joseph C. Cappelleri and Charmaine Demanuele are employees and stockholders of Pfizer Inc. P. Griffiths is an employee of IQVIA France. N. Karlsson is an employee and stockholder of AstraZeneca. J. Buenconsejo contributed to this work while she was an employee of AstraZeneca. She is now an employee and a stockholder of Bristol Myers Squibb. N Patel is an employee and a stockholder of AstraZeneca.

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Mc Carthy, M., Burrows, K., Griffiths, P. et al. From Meaningful Outcomes to Meaningful Change Thresholds: A Path to Progress for Establishing Digital Endpoints. Ther Innov Regul Sci 57, 629–645 (2023). https://doi.org/10.1007/s43441-023-00502-8

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