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ESMO-Magnitude of Clinical Benefit Scale version 2.0 (ESMO-MCBS v2.0)
N I Cherny1, S F Oosting2, U Dafni3
1Cancer Pain and Palliative Medicine Service, Department of Medical Oncology, Shaare Zedek Medical Center, Jerusalem, Israel.
Summary
The updated ESMO-Magnitude of Clinical Benefit Scale (ESMO-MCBS) v2.0 refines cancer therapy benefit assessment. Key changes include revised scoring for curative settings and improved toxicity evaluation, enhancing clinical utility.
Area of Science:
- Oncology
- Clinical Trial Methodology
- Health Economics and Outcomes Research
Background:
- The European Society for Medical Oncology-Magnitude of Clinical Benefit Scale (ESMO-MCBS) is a crucial tool for evaluating new cancer therapies.
- Version 2.0 (v2.0) was developed to address identified shortcomings and incorporate user feedback from v1.1.
Purpose of the Study:
- To describe the systematic development and implementation of the revised ESMO-MCBS v2.0.
- To enhance the scale's accuracy, discriminatory capacity, and utility in assessing clinical benefit.
Main Methods:
- A nine-step revision process involving critique review, solution drafting, field-testing, and multi-stage peer review.
- Incorporation of feedback from ESMO Faculty, ESMO Guidelines Committee, and ESMO-MCBS Working Group.
Main Results:
- Thirteen amendments were made, impacting the scoring of 13.6% of evaluated studies (10.5% downgraded, 3.1% upgraded).
- In curative settings, disease-free survival is now credited more conservatively, and acute/persistent toxicity annotations were added.
- Non-curative setting revisions improve statistical validity for survival curve differences and refine toxicity evaluation.
Conclusions:
- ESMO-MCBS v2.0 introduces significant revisions, including toxicity annotations for 45.5% of curative studies.
- The updated scale demonstrates improved discriminatory capacity and utility for assessing the magnitude of clinical benefit from cancer therapies.
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