Within-day test–retest reliability of an accelerometer-based method for registration of step time symmetry during stair descent after ACL reconstruction and in healthy subjects.
Background: Symmetry during stair descent can potentially be used as an early functional measure after anterior cruciate ligament reconstruction (ACLR). We have developed a novel application of a single accelerometer-based inertial motion unit (IMU) to identify foot strikes and calculate step times...
| Published in: | Physiotherapy Theory & Practice Vol. 38; no. 1; pp. 226 - 235 |
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| Main Authors: | , , |
| Format: | pictorial research tables/charts Journal Article |
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Taylor & Francis Ltd
Jan 2022
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=154545272&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 154545272 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09593985 BCJ jtl: Physiotherapy Theory & Practice issn: 09593985 maglogo: Y pubinfo: dt: Jan 2022 vid: 38 iid: 1 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 154545272 145605419 154545272 154545272 10.1080/09593985.2020.1723150 154545272 ppf: 226 ppct: 9 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Within-day test–retest reliability of an accelerometer-based method for registration of step time symmetry during stair descent after ACL reconstruction and in healthy subjects. aug: au: Vervaat, Willemijn Bogen, Bård Moe-Nilssen, Rolf affil: Department of Rehabilitation Services, Haraldsplass Deaconess Hospital, Bergen, Norway sug: subj: Anterior Cruciate Ligament Reconstruction Accelerometers Test-Retest Reliability Stair Climbing Evaluation Health Status Gait Analysis Human Male Female Adult Middle Age Physical Therapists Data Analysis Software Acceleration Intraclass Correlation Coefficient Descriptive Statistics Funding Source Adult: 19-44 years Middle Aged: 45-64 years Male Female ab: Background: Symmetry during stair descent can potentially be used as an early functional measure after anterior cruciate ligament reconstruction (ACLR). We have developed a novel application of a single accelerometer-based inertial motion unit (IMU) to identify foot strikes and calculate step times in an ordinary stairway. Purpose: To examine within-day test–retest reliability and measurement error of step time and step time symmetry measured with a body-fixed IMU during stair descent in subjects early after ACLR and in healthy subjects. Methods: Subjects after ACLR were tested twice 6 weeks (N = 15) and twice 3 months (N = 26) postoperatively. Eighteen healthy subjects were tested twice on one occasion. Subjects descended a flight of stairs at preferred speed. Trunk accelerometry data were collected with an inertial motion unit (IMU). Mean step times (MSTs) and limb symmetry index (LSI) of MSTs were calculated. Clinical trials registration number: NCT01279759. Results: Intraclass Correlation Coefficient (ICC (1,1)) for within test–retest reliability varied from 0.87 to 0.96 for MSTs and from 0.58 to 0.87 for LSIs. The 95% confidence interval (CI) for a true value varied from ± 0.02 seconds (s) to ± 0.05 s for MSTs and from ± 4.6 percentage points (pp) to ± 6.6 pp for LSIs. Conclusion: Mean step times measured with a body-fixed IMU during stair descent and limb symmetry indexes calculated from these mean step times are precise and reliable during early post-operative rehabilitation after ACLR and in healthy subjects. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Unknown language: English refInfo: holdings: @attributes: islocal: N |
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