Evidence map›Paper›PMID 25467765›Full record

ArticleClinical biomechanics (Bristol, Avon)2015

Relationship between biomechanical asymmetries during a step up and over task and stair climbing after total knee arthroplasty.

Federico Pozzi, Lynn Snyder-Mackler, Joseph Zeni

Abstract read
In one paragraph

Article in Clinical biomechanics (Bristol, Avon), 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing 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

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

24 citing papers in PubMed.

  1. Trial
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  5. Article
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  9. Concurrent Force Feedback on Load Symmetry in Total Knee Arthroplasty Patients.International journal of sports physical therapy · 2023
    Article
  10. Article
  11. Article
  12. Gait mechanics are influenced by quadriceps strength, age, and sex after total knee arthroplasty.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2021
    Article
  13. Review
  14. Article
  15. Article
  16. Step descent strategy is altered bilaterally despite unilateral muscle strength impairment after total knee arthroplasty.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2020
    Article
  17. Article
  18. Stiff knee gait may increase risk of second total knee arthroplasty.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2019
    Article
  19. Article
  20. Article
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

3 authors.

Federico PozziDepartment of Physical Therapy, University of Delaware, Newark, DE, USA.
Lynn Snyder-MacklerDepartment of Physical Therapy, University of Delaware, Newark, DE, USA.
Joseph ZeniDepartment of Physical Therapy, University of Delaware, Newark, DE, USA. Electronic address: jzenijr@udel.edu.

Funding

VALGUS BRACING FOR MEDIAL LAXITY IN PATIENTS WITH OSTEOARTHRITISP20RR016458 · NCRR · UNIVERSITY OF DELAWARE · PI KIRN-SAFRAN, CATHERINE · 2002 to 2011
$18.9M
MULTICENTER CAREER DEVELOPMENT PROGRAM FOR PHYSICAL AND OCCUPATIONAL THERAPYK12HD055931 · NICHD · WASHINGTON UNIVERSITY · PI HAYES, MARCIE HARRIS · 2007 to 2021
$12.7M
Pilot Project ProgramP30GM103333 · NIGMS · UNIVERSITY OF DELAWARE · PI BUCHANAN, THOMAS S · 2012 to 2016
$5.7M
NCRR NIH HHS P20 RR016458NICHD NIH HHS K12 HD055931NIGMS NIH HHS P30 GM103333
6 · The paper itself

Abstract

backgroundPatients six months after total knee arthroplasty (TKA) demonstrate movement asymmetries and functional deficits, which may be related to poor functional performance. The aims of this study were to 1) compare biomechanical variables between subjects 6 months after TKA and an age-matched healthy control group during a step up and over task and 2) determine the relationship between quadriceps strength, movement patterns and stair climbing performance.

methodsTwenty patients 6 months following unilateral TKA and twenty healthy controls were enrolled. Participants completed questionnaires, isometric quadriceps strength testing and performance based tests to quantify functional performance. Motion analysis was performed during a step up and over task. Functional and biomechanical variables were analyzed using a 2 × 2 ANOVA. The symmetry ratios (operated/non-operated limb*100) for biomechanical variables were analyzed using independent t-tests. Pearson correlations were performed to determine the relationships between biomechanical variables, strength and stair climbing performance.

findingsIn the TKA group, subjects had lower peak moments, power and sagittal plane excursion in the operated knee compared to the contralateral knee (P<0.05), while the hip on the operated side had greater power generation (P = 0.014). Compared to the control group, all symmetry ratios were significantly lower in the surgical group (P < 0.05). Stair climbing time was correlated with quadriceps strength of the operated limb (R = -0.762, P < 0.001).

interpretationIndividuals 6 months after TKA had worse performance with respect to biomechanics, quadriceps strength, and performance-based tests. Biomechanical asymmetries after TKA reduce the demand on the operated knee and increase reliance on the contralateral limb and ipsilateral hip.

Indexed as

Arthroplasty, Replacement, KneeAgedBiomechanical PhenomenaFemaleHumansKnee JointMaleMovementMuscle StrengthOsteoarthritis, KneeQuadriceps MuscleSurveys and QuestionnairesTask Performance and AnalysisArthroplastyKneeLower extremityOrthopedicsRehabilitation

Identifiers

PMID25467765
PMCPMC4298478

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Registered trials

None linked

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.