Evidence map›Paper›PMID 28831821›Full record

SynthesisActa orthopaedica2018

Long-term outcomes of over 8,000 medial Oxford Phase 3 Unicompartmental Knees-a systematic review.

Hasan R Mohammad, Louise Strickland, Thomas W Hamilton, David W Murray

Abstract readSystematic Review
PubMed Full text at PMC Publisher
In one paragraph

Synthesis in Acta orthopaedica, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 78 papers, 10 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
78citing papers in PubMed, 10 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.

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

78 citing papers in PubMed, 10 syntheses or guidelines pooled it.

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  4. Cementless unicompartmental knee replacement achieves better ten-year clinical outcomes than cemented: a systematic review.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
    Pooled it
  5. The effect of obesity on revision rate in unicompartmental knee arthroplasty: a systematic review and meta-analysis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
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  20. [Research progress on unicompartmental knee arthroplasty for elderly patients with knee osteoarthritis].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2024
    Review

18 more citing papers are in PubMed but not listed here.

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

4 authors.

Hasan R Mohammada Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS) , University of Oxford , Oxford , UK.
Louise Stricklanda Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS) , University of Oxford , Oxford , UK.
Thomas W Hamiltona Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS) , University of Oxford , Oxford , UK.
David W Murraya Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS) , University of Oxford , Oxford , UK.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background and purpose - There is debate as to the relative merits of unicompartmental and total knee arthroplasty (UKA, TKA). Although the designer surgeons have achieved good results with the Oxford UKA there is concern over the reproducibility of these outcomes. Therefore, we evaluated published long-term outcomes of the Oxford Phase 3 UKA. Patients and methods - We searched databases to identify studies reporting ≥10 year outcomes of the medial Oxford Phase 3 UKA. Revision, non-revision, and re-operation rates were calculated per 100 component years (% pa). Results - 15 studies with 8,658 knees were included. The annual revision rate was 0.74% pa (95% CI 0.67-0.81, n = 8,406) corresponding to a 10-year survival of 93% and 15-year survival of 89%. The non-revision re-operation rate was 0.19% pa (95% CI 0.13-0.25, n = 3,482). The re-operation rate was 0.89% pa (95% CI 0.77-1.02, n = 3,482). The most common causes of revision were lateral disease progression (1.42%), aseptic loosening (1.25%), bearing dislocation (0.58%), and pain (0.57%) (n = 8,658). Average OKS scores were 40 at 10 years (n = 3,417). The incidence of medical complications was 0.83% (n = 1,443). Interpretation - Very good outcomes were achieved by both designer and non-designer surgeons. The PROMs, medical complication rate, and non-revision re-operation rate were better than those found in meta-analyses and publications for TKA but the revision rate was higher. However, if failure is considered to be all re-operations and not just revisions, then the failure rate of UKA was less than that of TKA.

Indexed as

Arthroplasty, Replacement, KneeKnee ProsthesisHumansOsteoarthritis, KneeProsthesis FailureTreatment Outcome

Identifiers

PMID28831821
PMCPMC5810816

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Registered trials

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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.