Reliability and construct validity of the Duchenne Video Assessment.
Muscle Nerve
; 64(2): 180-189, 2021 08.
Article
em En
| MEDLINE
| ID: mdl-34050939
ABSTRACT
INTRODUCTION:
The Duchenne Video Assessment (DVA) assesses quality of movement as an indication of Duchenne muscular dystrophy (DMD) disease severity. Caregivers video record patients performing home-based movement tasks using a mobile application, and physical therapists (PTs) rate the videos using scorecards with prespecified compensatory movement criteria. Reliability and construct validity of the DVA were tested using video and Pediatric Outcomes Data Collection Instrument (PODCI) data from patients with DMD and healthy controls from a separate study.METHODS:
Fifteen PTs were trained and certified as DVA raters. All raters scored videos of five subjects performing each movement task; nine raters rescored the same videos four weeks later. Three raters scored videos from an average of 25 subjects for each movement task. Aggregate scores were used to test construct validity. An expert DMD clinician assigned each video to a severity group for known-groups analyses. Differences between rater scores across severity groups were tested and correlations between DVA and PODCI scores were calculated.RESULTS:
Inter-rater reliability (intraclass correlation coefficient [ICC]) between all 15 raters ranged from 0.70 to 0.97 for all movement tasks. Mean intra-rater reliability ICC for nine raters ranged from 0.82 to 0.98 for all movement tasks. There were statistically significant differences between known severity groups for all movement tasks. The DVA correlated strongly with related PODCI constructs of physical function and weakly with unrelated constructs.DISCUSSION:
The DVA was found to be a reliable and valid tool for measuring quality of movement as an indication of disease severity.Palavras-chave
Texto completo:
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Base de dados:
MEDLINE
Assunto principal:
Reprodutibilidade dos Testes
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Cuidadores
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Distrofia Muscular de Duchenne
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Movimento
Limite:
Adolescent
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Child
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Child, preschool
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Humans
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Male
Idioma:
En
Ano de publicação:
2021
Tipo de documento:
Article