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Duong T, Harding G, Mannix S, Abel C, Phillips D, Alfano LN, Bönnemann CG, Lilien C, Lowes LP, Servais L, Warken-Madelung B, Nieto Bergman S, James ES, Noursalehi M, Prasad S, Rico S, Bilder DA. Use of the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders (CHOP INTEND) in X-Linked Myotubular Myopathy: Content Validity and Psychometric Performance. J Neuromuscul Dis 2021; 8:63-77. [PMID: 32925083 PMCID: PMC7902972 DOI: 10.3233/jnd-200479] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
X-linked myotubular myopathy (XLMTM) is a life-threatening, congenital myopathy characterized by extreme hypotonia, weakness, delayed motor milestones, and respiratory failure, often resulting in pediatric mortality. This study evaluated the content validity and psychometric performance of the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders as a measure of neuromuscular functioning in children with X-linked myotubular myopathy. This study was conducted in two phases. Phase I assessed the content validity of the measure for use in an XLMTM pediatric population through: literature review, clinical expert interviews, caregiver interviews, and a modified-Delphi panel among clinicians. Phase II assessed psychometric performance based on the INCEPTUS observational clinical study and the ASPIRO interventional gene therapy study, including tests of reliability (internal consistency, test-retest, and interrater), validity (construct and criterion), and responsiveness based on observational and interventional clinical trial data analyses. Data established construct validity and reliability of the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders among XLMTM patients before administration of resamirigene bilparvovec, and sensitivity to study drug administration as evidenced by the significant post-administration response in ASPIRO. Findings support the Children's Hospital of Philadelphia Infant Test of Neuromuscular Disorders as an appropriate neuromuscular functioning assessment in a pediatric X-linked myotubular myopathy patient population.
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Affiliation(s)
| | | | | | | | | | | | | | - Charlotte Lilien
- MDUK Oxford Neuromuscular Centre, Oxford, United Kingdom.,Institut I-Motion, Institut de Myologie, Paris, France
| | | | - Laurent Servais
- MDUK Oxford Neuromuscular Centre, Oxford, United Kingdom.,Institut I-Motion, Institut de Myologie, Paris, France.,University Hospital Liège & University of La Citadelle, Liège, Belgium
| | | | | | - Emma S James
- Encoded Therapeutics, South San Francisco, CA, USA formerly at Audentes Therapeutics, an Astellas Company, San Francisco, CA, USA
| | | | - Suyash Prasad
- Suyash Prasad Consulting, LLC, San Francisco, CA, USA formerly at Audentes Therapeutics, an Astellas Company, San Francisco, CA, USA
| | - Salvador Rico
- Encoded Therapeutics, South San Francisco, CA, USA formerly at Audentes Therapeutics, an Astellas Company, San Francisco, CA, USA
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