Evidence map›Paper›PMID 28879594›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2018

Body mass index changes after unicompartmental knee arthroplasty do not adversely influence patient outcomes.

Zhan Xia, Ming Han Lincoln Liow, Graham Seow-Hng Goh, Hwei Chi Chong, Ngai Nung Lo, Seng Jin Yeo

Abstract read
PubMed Publisher
In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 2 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

8 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Obesity increases the risk of conversion to total knee arthroplasty after unicompartimental knee arthroplasty: a meta-analysis.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2022
    Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Return to physical activity and change in body mass index after hypoallergenic medial mobile-bearing unicompartmental knee arthroplasty.Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2021
    Article
  6. Article
  7. [Effect of body mass index on short- and medium-term effectiveness of unicompartmental knee arthroplasty].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2020
    Article
  8. [Research progress in unicompartmental knee arthroplasty].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2020
    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

6 authors.

Zhan XiaDepartment of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore. williamxia0402@gmail.com.ORCID http://orcid.org/0000-0002-5888-0042
Ming Han Lincoln LiowDepartment of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore.
Graham Seow-Hng GohDepartment of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore.
Hwei Chi ChongDepartment of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore.
Ngai Nung LoDepartment of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore.
Seng Jin YeoDepartment of Orthopaedic Surgery, Singapore General Hospital, Outram Road, Singapore, 169608, Singapore.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe objective of this study is to evaluate the prevalence of patients who lost or gained weight following unicompartmental knee arthroplasty (UKA), the effect of post-operative body mass index (BMI) changes on functional outcomes and quality of life (QoL), and predictive factors associated with BMI changes.

methodsProspectively collected data of 1043 patients who underwent UKA between 2000 and 2014 were reviewed. BMI, Knee Society Knee Score and Function Score, Oxford Knee Score (OKS), Short-Form 36 (SF-36) Physical Component Score (PCS) and Mental Component Score and proportion of patients attaining OKS/SF-36 minimal clinically important differences (MCID) were recorded preoperatively and at 2 years post-operatively. The patients were stratified into three groups based on weight changes for further analysis.

resultsFollowing UKA, 138 (13.3%) patients had lost weight, 695 (66.6%) maintained their weight, and 210 (20.1%) gained weight. Patients in all groups demonstrated significant improvements in functional and SF-36 PCS scores at 2 years post-operatively. There were no significant differences in functional outcomes, QoL or revision rate between the groups. Post-operative BMI changes were not correlated with any outcome scores or attainment of MCID (n.s.).

conclusionsThis is the first study that evaluates change in BMI following UKA. It demonstrated a higher proportion of patients who gained weight as compared to those who lost weight. Post-operative BMI changes did not appear to affect outcomes of UKA. These findings will provide important information to surgeons when counselling patients regarding BMI change and its effect on outcomes after UKA. LEVELS OF EVIDENCE: Level III.

Indexed as

Body Mass IndexAgedArthroplasty, Replacement, KneeFemaleHumansMaleMiddle AgedOsteoarthritis, KneeQuality of LifeRecovery of FunctionTreatment OutcomeWeight GainWeight LossBody mass indexFunctional outcomesQuality of lifeUnicompartmental knee arthroplasty

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.