Between-session reliability of skin marker-derived spinal kinematics during functional activities

Niggli, Luzia Anna; Eichelberger, Patric; Bangerter, Christian; Baur, Heiner; Schmid, Stefan (2021). Between-session reliability of skin marker-derived spinal kinematics during functional activities Gait & Posture, 85, pp. 280-284. Elsevier 10.1016/j.gaitpost.2021.02.008

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Background: Skin marker-based analysis of functional spinal movement is a promising method for quantifying longitudinal effects of treatment interventions in patients with spinal pathologies. However, observed day-to-day changes might not necessarily be due to a treatment intervention, but can result from errors related to soft tissue artifacts, marker placement inaccuracies or biological day-to-day variability. Research question: How reliable are skin marker-derived three-dimensional spinal kinematics during functional activities between two separate measurement sessions? Methods: Twenty healthy adults (11 females/9 males) were invited to a movement analysis laboratory for two visits separated by 7–10 days. At each visit, they performed various functional activities (i.e. sitting, standing, walking, running, chair rising, box lifting and vertical jumping), while marker trajectories were recorded using a skin marker-based 10-camera optical motion capture system and used to calculate sagittal and frontal plane spinal curvature angles as well as transverse plane segmental rotational angles in the lumbar and thoracic regions. Between-session reliability for continuous data and discrete parameters was determined by analyzing systematic errors using one sample T-tests as well as by calculating intraclass correlation coefficients (ICCs) and minimal detectable changes (MDCs). Results and Significance: The analysis indicated high relative consistency for sagittal plane curvature angles during all activities, but not for frontal and transverse plane angles during walking and running. MDCs were mostly below 15◦, with relative values ranging between 10 % and 750 %. This study provides important information that can serve as a basis for researchers and clinicians aiming at investigating longitudinal effects of treatment interventions on spinal motion behavior in patients with spinal pathologies.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Health Professions School of Health Professions > Physiotherapy School of Health Professions > Physiotherapy > Spinal Movement Biomechanics
Name:	Niggli, Luzia Anna; Eichelberger, Patric0000-0003-2223-6113; Bangerter, Christian; Baur, Heiner0000-0002-4780-225X and Schmid, Stefan0000-0001-5138-9800
ISSN:	0966-6362
Publisher:	Elsevier
Language:	English
Submitter:	Stefan Schmid
Date Deposited:	04 Mar 2021 09:04
Last Modified:	04 Mar 2021 09:04
Publisher DOI:	10.1016/j.gaitpost.2021.02.008
ARBOR DOI:	10.24451/arbor.14464
URI:	https://arbor.bfh.ch/id/eprint/14464