Continuous daily assessment of multiple sclerosis disability using remote step count monitoring.
J Neurol
; 264(2): 316-326, 2017 Feb.
Article
en En
| MEDLINE
| ID: mdl-27896433
ABSTRACT
Disability measures in multiple sclerosis (MS) rely heavily on ambulatory function, and current metrics fail to capture potentially important variability in walking behavior. We sought to determine whether remote step count monitoring using a consumer-friendly accelerometer (Fitbit Flex) can enhance MS disability assessment. 99 adults with relapsing or progressive MS able to walk ≥2-min were prospectively recruited. At 4 weeks, study retention was 97% and median Fitbit use was 97% of days. Substudy validation resulted in high interclass correlations between Fitbit, ActiGraph and manual step count tally during a 2-minute walk test, and between Fitbit and ActiGraph (ICC = 0.76) during 7-day home monitoring. Over 4 weeks of continuous monitoring, daily steps were lower in progressive versus relapsing MS (mean difference 2546 steps, p < 0.01). Lower average daily step count was associated with greater disability on the Expanded Disability Status Scale (EDSS) (p < 0.001). Within each EDSS category, substantial variability in step count was apparent (i.e., EDSS = 6.0 range 1097-7152). Step count demonstrated moderate-strong correlations with other walking measures. Lower average daily step count is associated with greater MS disability and captures important variability in real-world walking activity otherwise masked by standard disability scales, including the EDSS. These results support remote step count monitoring as an exploratory outcome in MS trials.
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Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Caminata
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Telemedicina
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Esclerosis Múltiple Crónica Progresiva
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Esclerosis Múltiple Recurrente-Remitente
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Evaluación de la Discapacidad
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Acelerometría
Tipo de estudio:
Observational_studies
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Risk_factors_studies
Límite:
Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
J Neurol
Año:
2017
Tipo del documento:
Article
País de afiliación:
Estados Unidos