Test-retest reliability of the StepWatch Activity Monitor outputs in healthy adults

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aut.relation.endpage676
aut.relation.issue5
aut.relation.startpage671
aut.relation.volume7
dc.contributor.authorMudge, S
dc.contributor.authorTaylor, D
dc.contributor.authorChang, O
dc.contributor.authorWong, R
dc.date.accessioned2013-05-21T03:13:38Z
dc.date.available2013-05-21T03:13:38Z
dc.date.copyright2010-09
dc.date.issued2010-09
dc.description.abstractBackground: Activity Monitors give an objective measure of usual walking performance. This study aimed to examine the test-retest reliability of the StepWatch Activity Monitor outputs (mean steps/day; peak activity index; sustained activity indices of 1, 5, 20, 30, 60 minutes; steps at high, medium, and low stepping rates). Methods: Thirty healthy adults age 18 to 49 years wore the StepWatch for 2 3-day periods at least 1 week apart. Results: The intraclass correlation coefficients of the StepWatch outputs ranged from 0.44 to 0.91 over 3 days. The coefficient of variation ranged from 3.0% to 51.3% over the monitoring periods, with higher variation shown for shorter monitoring periods. The most reliable 5 outputs had 95% limits of agreement between 3-day periods that were less than 40%. These were mean steps/day (±39.1%), highest step rate in 1 (±17.3%) and 5 (±37.4%) minutes, peak activity index (±25.6%), and percentage of inactive time (±9.52%). Conclusions: Mean steps/day, highest step rate in 1 and 5 minutes, peak activity index, and percentage of inactive time have good test-retest reliability over a 3-day monitoring period, with lower reliability shown by the other StepWatch outputs. Monitoring over 1 or 2 days is less reliable.
dc.identifier.citationJ Phys Act Health, vol.7(5), pp.671 - 676
dc.identifier.issn1543-3080
dc.identifier.roid16775en_NZ
dc.identifier.urihttps://hdl.handle.net/10292/5350
dc.publisherHuman Kinetics
dc.relation.urihttp://journals.humankinetics.com/jpah-back-issues/jpah-volume-7-issue-5-september/test-retest-reliability-of-the-stepwatch-activity-monitor-outputs-in-healthy-adults
dc.rightsThe authors explicitly reserve the right to post an electronic version of the finalized article on the author's own website or web site(s) or other electronic repositories controlled by the author's institution, provided that the electronic version is in PDF or other image capturing format.
dc.rights.accessrightsOpenAccess
dc.subjectAdult
dc.subjectEquipment Design
dc.subjectErgometry
dc.subjectFemale
dc.subjectGait
dc.subjectHumans
dc.subjectMale
dc.subjectMiddle aged
dc.subjectMonitoring
dc.subjectAmbulatory
dc.subjectMotor activity
dc.subjectNew Zealand
dc.subjectReproducibility of results
dc.titleTest-retest reliability of the StepWatch Activity Monitor outputs in healthy adults
dc.typeJournal Article
pubs.elements-id14145
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Health & Environmental Science
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