Evidence map›Paper›PMID 27694511›Full record

ArticleThe bone & joint journal2016

Gait comparison of unicompartmental and total knee arthroplasties with healthy controls.

G G Jones, M Kotti, A V Wiik, R Collins, M J Brevadt, R K Strachan, J P Cobb

Registry-linked trialAbstract readComparative Study
PubMed Full text at PMC Publisher
In one paragraph

Article in The bone & joint journal, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT04913987 (PPK), which is not on this map. Cited by 44 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 8 pooled it
–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.

NCT04913987 naunknown statusnot on this mapstarted 2021, after this paper: background citation

PPK: A Functional and Clinical Comparison of a Partial and Total Knee Replacement

TypeinterventionalSponsorGolden Jubilee National HospitalRan2021 to 2025Enrolled50ConditionsArthroplasty, Replacement, KneeArmsStryker Triathlon total knee replacement, Zimmer Biomet Persona Partial Knee unicondylar knee replacement
3 · Its place in the literature

Who cites it

44 citing papers in PubMed, 8 syntheses or guidelines pooled it.

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  5. Kinematic alignment of medial UKA is safe: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
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  7. Unicompartmental knee arthroplasty fails to completely restore normal gait patterns during level walking.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2018
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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.

G G JonesMSk Lab, Imperial College London, Charing Cross Hospital, Fulham Palace Road, London, W6 8RF, UK.
M KottiMSk Lab, Imperial College London, Charing Cross Hospital, Fulham Palace Road, London, W6 8RF, UK.
A V WiikMSk Lab, Imperial College London, Charing Cross Hospital, Fulham Palace Road, London, W6 8RF, UK.
R CollinsMSk Lab, Imperial College London, Charing Cross Hospital, Fulham Palace Road, London, W6 8RF, UK.
M J BrevadtMSk Lab, Imperial College London, Charing Cross Hospital, Fulham Palace Road, London, W6 8RF, UK.
R K StrachanImperial College NHS Trust, Charing Cross Hospital, Fulham Palace Road, London, W6 8RF, UK.
J P CobbMSk Lab, Imperial College London, Charing Cross Hospital, Fulham Palace Road, London, W6 8RF, UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

aimsTo compare the gait of unicompartmental knee arthroplasty (UKA) and total knee arthroplasty (TKA) patients with healthy controls, using a machine-learning approach. PATIENTS AND

methods145 participants (121 healthy controls, 12 patients with cruciate-retaining TKA, and 12 with mobile-bearing medial UKA) were recruited. The TKA and UKA patients were a minimum of 12 months post-operative, and matched for pattern and severity of arthrosis, age, and body mass index. Participants walked on an instrumented treadmill until their maximum walking speed was reached. Temporospatial gait parameters, and vertical ground reaction force data, were captured at each speed. Oxford knee scores (OKS) were also collected. An ensemble of trees algorithm was used to analyse the data: 27 gait variables were used to train classification trees for each speed, with a binary output prediction of whether these variables were derived from a UKA or TKA patient. Healthy control gait data was then tested by the decision trees at each speed and a final classification (UKA or TKA) reached for each subject in a majority voting manner over all gait cycles and speeds. Top walking speed was also recorded.

results92% of the healthy controls were classified by the decision tree as a UKA, 5% as a TKA, and 3% were unclassified. There was no significant difference in OKS between the UKA and TKA patients (p = 0.077). Top walking speed in TKA patients (1.6 m/s; 1.3 to 2.1) was significantly lower than that of both the UKA group (2.2 m/s; 1.8 to 2.7) and healthy controls (2.2 m/s; 1.5 to 2.7; p < 0.001).

conclusionUKA results in a more physiological gait compared with TKA, and a higher top walking speed. This difference in function was not detected by the OKS. Cite this article: Bone Joint J 2016;98-B(10 Suppl B):16-21.

Indexed as

AdolescentAdultAgedAged, 80 and overArthroplasty, Replacement, KneeCase-Control StudiesExercise TestGaitHumansKnee JointMachine LearningMiddle AgedOsteoarthritis, KneeRecovery of FunctionSeverity of Illness IndexTreatment OutcomeGaitPatient-reported outcome measuresTotal knee arthroplastyUnicompartmental knee arthroplasty

Identifiers

PMID27694511
PMCPMC5047137

What OpenQuestion holds

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Registered trials

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.