Abstract
Rietberg MB, van Wegen EE, Uitdehaag BM, de Vet HC, Kwakkel G. How reproducible is
home-based 24-hour ambulatory monitoring of motor activity in patients with multiple
sclerosis?
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 ICCagreement 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.
Key Words
List of Abbreviations:
ADLs (activities of daily living), AM (activity monitor), EDSS (Expanded Disability Status Scale), ICC (intraclass correlation coefficient), IQR (interquartile range), LoA (limit of agreement), MS (multiple sclerosis), SDC (smallest detectable change), SEM (standard error of the mean)To read this article in full you will need to make a payment
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References
- Exercise therapy for multiple sclerosis.Cochrane Database Syst Rev. 2005; 1 (CD003980)
- Exercise and multiple sclerosis.Sports Med. 2004; 34: 1077-1100
- Changes in gait and fatigue from morning to afternoon in people with multiple sclerosis.J Neurol Neurosurg Psychiatry. 2002; 72: 361-365
- Children's active free play in local neighborhoods: a behavioral mapping study.Health Educ Res. 2008; 23: 870-879
- Automated physical activity monitoring: validation and comparison with physiological and self-report measures.Psychophysiology. 1993; 30: 296-305
- The assessment of physical activity by questionnaire.Am J Epidemiol. 1986; 123: 563-576
- Assessment of physical and mental activity using a standardized computer-assisted diary during ambulatory blood pressure monitoring.J Hypertens. 1993; 11: S284-S285
- Physical activity assessment: a review of methods.Crit Rev Food Sci Nutr. 1996; 36: 385-396
- Physical activity and multiple sclerosis: validity of self-report and objective measures.Fam Community Health. 2007; 30: 144-150
- Practice parameters for the role of actigraphy in the study of sleep and circadian rhythms: an update for 2002.Sleep. 2003; 26: 337-341
- Measuring daily behavior using ambulatory accelerometry: the activity monitor.Behav Res Methods Instrum Comput. 2001; 33: 349-356
- Quantified measurement of activity provides insight into motor function and recovery in neurological disease.J Neurol Neurosurg Psychiatry. 2004; 75: 884-888
- Accuracy of two electronic pedometers for measuring steps taken under controlled conditions among ambulatory individuals with multiple sclerosis.Multiple Sclerosis. 2005; 11: 343-345
- Techniques for measurement and assessment of mobility in rehabilitation: a theoretical approach.Clin Rehabil. 1998; 12: 455-464
- Monitoring activity in individuals with Parkinson disease: a validity study.J Neurol Phys Ther. 2006; 30: 12-21
- Accuracy of objective ambulatory accelerometry in detecting motor complications in patients with Parkinson disease.Clin Neuropharmacol. 2004; 27: 53-57
- Does cueing training improve physical activity in patients with Parkinson's disease?.Neurorehabil Neural Repair. 2010; 24: 469-477
- Validity and reliability of measurements obtained with an “activity monitor” in people with and without a transtibial amputation.Phys Ther. 1998; 78: 989-998
- Validity of ambulatory accelerometry to quantify physical activity in heart failure.Scand J Rehabil Med. 2000; 32: 187-192
- Ambulatory accelerometry to quantify motor behaviour in patients after failed back surgery.Pain. 1998; 74: 153-161
- Recommended diagnostic criteria for multiple sclerosis: guidelines from the International Panel on the Diagnosis of Multiple Sclerosis.Ann Neurol. 2001; 50: 121-127
- Rating neurologic impairment in multiple sclerosis: an Expanded Disability Status Scale (EDSS).Neurology. 1983; 33: 1444-1452
- When to use agreement versus reliability measures.J Clin Epidemiol. 2006; 59: 1033-1039
- Reliability of assessment tools in rehabilitation: an illustration of appropriate statistical analyses.Clin Rehabil. 1998; 12: 187-199
- Statistical methods for assessing agreement between two methods of clinical measurement.Lancet. 1986; 1: 307-310
- The application of generalizability theory to reliability assessment: an illustration using isometric force measurements.Phys Ther. 1993; 73: 386-395
- Reliability of scores from physical activity monitors in adults with multiple sclerosis.Adapt Phys Activ Q. 2007; 24: 245-253
Article info
Footnotes
Supported by Stichting MS Research (project no. 04-553 MS).
No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit on the authors or on any organization with which the authors are associated.
Reprints are not available from the author.
Identification
Copyright
© 2010 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.
