Please use this identifier to cite or link to this item: https://dora.health.qld.gov.au/qldresearchjspui/handle/1/4788
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dc.contributor.authorZiviani, J.en
dc.contributor.authorMitchell, L. E.en
dc.contributor.authorBoyd, R. N.en
dc.date.accessioned2022-11-07T23:56:21Z-
dc.date.available2022-11-07T23:56:21Z-
dc.date.issued2014en
dc.identifier.citation56 , 2014, p. 49-50en
dc.identifier.otherRISen
dc.identifier.urihttp://dora.health.qld.gov.au/qldresearchjspui/handle/1/4788-
dc.description.abstractObjective: The reliability of accelerometers in individuals with cerebral palsy has not been determined. This study aimed to establish the reliability of the ActiGraph®GT3X+ tri-axial accelerometer in children and adolescents with congenital hemiplegia. Design: Test-retest measurement study. Method: Thirty children (n=16 males; n=13 right hemiplegia) with spastic type congenital hemiplegia aged between 8 and 17 years (mean 11yr 11mo, SD 2yr 7mo) classified at GMFCS levels I (n=16) or II (n=14) were recruited from a tertiary hospital. Participants completed 43 minutes of standardized tasks on two consecutive days wearing an ActiGraph®GT3X+ tri-axial accelerometer at the hip on the unimpaired side, concurrently measuring heart rate (HR) using a PolarRS400® monitor and video recording. Testing protocol comprised 5 minutes seated rest period (REST) followed by 5 minutes walking at light (LW: 0.53m/sec), moderate (MW: 1.16m/sec) and vigorous (VW: 6min at 1.53m/s) pace on a 10 m linear track, and 3 minutes rapid stepping on/off a 20 cm step (STEP), interspersed with 5 minutes seated rest. ActiGraph® counts were synchronized with HR and standardized task then time coded into 5 seconds epochs. Two minutes of synchronized data were extracted from each task when HR reached steady state. Y-axis activity counts were converted to intensity using Evenson cut points. Reliability was calculated using intraclass- correlation coefficients (ICC) between days for each task (two-factor, mixed-effects, agreement model). Percentage agreement between ActiGraph® calculated and task intensity, and minimum detectable difference (MD=[SD√1-ICC] x1.96x√2) were calculated. Activity counts are counts/epoch, data is mean (SD). Results: Activity counts and HR increased with increasing task intensity. Mean activity counts during REST: 0.5 (5.3), LW: 52.9 (61.5), MW: 125.2 (82.4), VW: 355.9 (107.1), STEP: 286.0 (110.6); rise in HR from REST (bpm): LW: 17.7 (8.0), MW: 22.6 (8.8), VW: 51.9 (15.4), STEP: 51.8 (10.2). Agreement between activity intensity was 80-98% during REST, LW, VW and STEP tasks, but only 17% during MW. Testretest reliability was strong for LW (ICC=0.80), MW (ICC=0.80) and VW (ICC=0.70) but moderate for STEP tasks (ICC=0.67). MD was 15 counts/epoch for SED, 77 for LW, 101 for MW, 162 for VW and 178 for STEP tasks, meaning a difference of 23 345 counts or 10 minutes of moderate to vigorous physical activity (MVPA) between 12 hours wear periods is a statistically important change. Conclusion: The ActiGraph®GT3X+ tri-axial accelerometer is reliable during standardised walking and stepping tasks in independently ambulant children and adolescents with congenital hemiplegia.L716833842014-11-18 <br />en
dc.language.isoenen
dc.relation.ispartofDevelopmental Medicine and Child Neurologyen
dc.titleTest-retest reliability of the ActiGraph® accelerometer in children and adolescents with congenital hemiplegia: How much more activity is needed?en
dc.typeArticleen
dc.identifier.doi10.1111/dmcn.12368en
dc.subject.keywordscorrelation coefficienten
dc.subject.keywordsspasticityen
dc.subject.keywordssteady stateen
dc.subject.keywordsmodelen
dc.subject.keywordsmaleen
dc.subject.keywordsphysical activityen
dc.subject.keywordsGross Motor Function Classification Systemen
dc.subject.keywordstrichloroethylenerecombinant erythropoietinen
dc.subject.keywordsnitrogen 13en
dc.subject.keywordshumanen
dc.subject.keywordstest retest reliabilityen
dc.subject.keywordschilden
dc.subject.keywordsaccelerometeren
dc.subject.keywordsadolescenten
dc.subject.keywordshemiplegiaen
dc.subject.keywordscerebral palsyen
dc.subject.keywordsreliabilityen
dc.subject.keywordswalkingen
dc.subject.keywordsvideorecordingen
dc.subject.keywordsheart rateen
dc.subject.keywordshipen
dc.subject.keywordstertiary care centeren
dc.relation.urlhttps://www.embase.com/search/results?subaction=viewrecord&id=L71683384&from=exporthttp://dx.doi.org/10.1111/dmcn.12368 |en
dc.identifier.risid1567en
dc.description.pages49-50en
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.fulltextNo Fulltext-
item.grantfulltextnone-
item.openairetypeArticle-
item.languageiso639-1en-
Appears in Sites:Children's Health Queensland Publications
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