Refining clinical trial inclusion criteria to optimize the standardized response mean of the CMTPedS
Kayla Cornett, Manoj P. Menezes, Paula Bray, Rosemary Shy, Isabella Moroni, Emanuela Pagliano, Davide Pareyson, Tim Estilow, Sabrina W. Yum, Trupti Bhandari, Francesco Muntoni, Matilde Laurá, Mary M. Reilly, Richard S. Finkel, Katy Eichinger, David N. Herrmann, Michael E. Shy, Joshua Burns, CMTPedS Study Group
Abstract
The CMT Pediatric Scale (CMTPedS) is a reliable, valid, and responsive clinical outcome measure of disability in children with CMT. The aim of this study was to identify the most responsive patient subset(s), based on the standardized response mean (SRM), to optimize the CMTPedS as a primary outcome measure for upcoming clinical trials. Analysis was based on a 2-year natural history data from 187 children aged 3-20 years with a range of CMT genetic subtypes. Subsets based on age (3-8 years), disability level (CMTPedS score 0-14), and CMT type (CMT1A) increased the SRM of the CMTPedS considerably. Refining the inclusion criteria in clinical trials to younger, mildly affected cases of CMT1A optimizes the responsiveness of the CMTPedS.