Evidence map›Paper›PMID 40431914›Full record

ArticleSensors (Basel, Switzerland)2025

Evaluating Degenerative Lumbar Disease with Markerless 3D Motion Capture: Reliability and Validity in Sit-to-Stand Test.

Yi-Ting Huang, Szu-Hua Chen, Chao-Ying Chen, Shiu-Min Wang, Pei-Yuan Wu, Dar-Ming Lai, Wei-Li Hsu

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In one paragraph

Article in Sensors (Basel, Switzerland), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Yi-Ting HuangSchool and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, No. 17, Xuzhou Rd., Zhongzheng Dist., Taipei City 100, Taiwan.
Szu-Hua ChenDepartment of Physical Therapy, Ithaca College, Ithaca, NY 14850, USA.ORCID 0000-0003-1807-2961
Chao-Ying ChenPhysical Therapy Centre, National Taiwan University Hospital, No. 1, Changde St., Zhongzheng Dist., Taipei City 100, Taiwan.
Shiu-Min WangSchool and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, No. 17, Xuzhou Rd., Zhongzheng Dist., Taipei City 100, Taiwan.
Pei-Yuan WuDepartment of Electrical Engineering, National Taiwan University, Taipei City 106, Taiwan.
Dar-Ming LaiDivision of Neurosurgery, Department of Surgery, National Taiwan University Hospital, Taipei City 100, Taiwan.
Wei-Li HsuSchool and Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, No. 17, Xuzhou Rd., Zhongzheng Dist., Taipei City 100, Taiwan.ORCID 0000-0003-4577-140X

Funding

Ministry of Science and Technology 111-2223-E-002 -004 -MY3National Health Research Institutes NHRI-EX112-11019EI
6 · The paper itself

Abstract

backgroundDegenerative lumbar disease (DLD) affects older adults, causing lumbar degeneration and lower extremity dysfunction. The five-times sit-to-stand test (5xSTS) reveals kinematic changes associated with DLD. While marker-based motion capture systems detect these changes, their complexity limits clinical use. Markerless motion capture offers a portable alternative, yet its functional assessment applications in DLD remain underexplored. Thus, the aim of this study is to evaluate the reliability and validity of markerless motion capture for assessing functional tests in DLD patients.

methodsThis study included 11 healthy individuals (mean age: 27.28 ± 6.92 years) and 10 with DLD (mean age: 70.00 ± 8.08 years). Participants performed the 5xSTS while being recorded by marker-based (VICON) and markerless (MediaPipe) systems using two synchronized cameras. Test-retest reliability was assessed over one week via the intraclass correlation coefficient (ICC). Concurrent validity and agreement between VICON and MediaPipe were evaluated via Pearson/Spearman correlation coefficients, systematic bias, and the root mean square error (RMSE). Movement time, joint excursions, and angular velocities were also analyzed and compared across two groups.

resultsBoth systems showed high test-retest reliability (ICC: 0.81-0.99) and strong correlations (r: 0.75-0.99). The highest RMSE was observed at the ankle in the anterior-posterior (A-P) direction in the DLD group (54.55 mm) and at the hip A-P axis in the control group (51.20 mm). The lowest RMSE was found at the knee medial-lateral (M-L) axis in the DLD group (7.88 mm) and at the ankle M-L axis in the control group (8.54 mm). Bias values ranged from 0.30 mm (hip vertical in control group) to +53.47 mm (ankle A-P in DLD group), with underestimation more common at the hip and overestimation at the ankle. The control group demonstrated a faster 5xSTS completion time (5.89 ± 0.69 s vs. 8.13 ± 1.96 s,

conclusionMediaPipe markerless motion capture can quantify 3D kinematic changes in DLD patients during functional performance. It enables a clinical evaluation with minimal setup, offers potential for remote assessment, and accurately detects sagittal plane movement. The two-camera system provides 3D kinematic data comparable to multi-camera systems, suitable for home rehabilitation and assessment.

Indexed as

Imaging, Three-DimensionalIntervertebral Disc DegenerationLumbar VertebraeAdultAgedBiomechanical PhenomenaFemaleHumansMaleMiddle AgedMotion CaptureMovementRange of Motion, ArticularReproducibility of Resultsdegenerative lumbar diseasemarkerless motion capture systemsit-to-stand test

Identifiers

PMID40431914
PMCPMC12115460

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.