Article

OBJECTIVE: To determine the reproducibility of 24-hour monitoring of motor
activity in patients with multiple sclerosis (MS). DESIGN: Test-retest design; 6
research assistants visited the participants twice within 1 week in the home
situation. SETTING: General community. PARTICIPANTS: A convenience sample of
ambulatory patients (N=43; mean age +/- SD, 48.7+/-7.0y; 30 women; median
Expanded Disability Status Scale scores, 3.5; interquartile range, 2.5) were
recruited from the outpatient clinic of a university medical center.
INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Dynamic activity and static
activity parameters were recorded by using a portable data logger and classified
continuously for 24 hours. Reproducibility was determined by calculating
intraclass correlation coefficients (ICCs) for test-retest reliability and by
applying the Bland-Altman method for agreement between the 2 measurements. The
smallest detectable change (SDC) was calculated based on the standard error of
measurement. RESULTS: Test-retest reliability expressed by the ICC(agreement) was
.72 for dynamic activity, .74 for transitions, .77 for walking, .71 for static
activity, .67 for sitting, .62 for standing, and .55 for lying. Bland and Altman
analysis indicated no systematic differences between the first and second
assessment for dynamic and static activity. Measurement error expressed by the
SDC was 1.23 for dynamic activity, 66 for transitions, .99 for walking, 1.52 for
static activity, 4.68 for lying, 3.95 for sitting, and 3.34 for standing.
CONCLUSIONS: The current study shows that with 24-hour monitoring, a reproducible
estimate of physical activity can be obtained in ambulatory patients with MS.
CI - Copyright (c) 2010 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS