Evidence map›Paper›PMID 23457332›Full record

ArticleBMJ open2013

The association of patient characteristics and surgical variables on symptoms of pain and function over 5 years following primary hip-replacement surgery: a prospective cohort study.

Andy Judge, Nigel K Arden, Rajbir N Batra, Geraint Thomas, David Beard, M Kassim Javaid, Cyrus Cooper, David Murray, Exeter Primary Outcomes Study (EPOS) group

Registry-linked trialOpen access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in BMJ open, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07147530 (Study to Verify Effectiveness and Safety of the Electrically Powered Orthopedic Exercise Device on Gait Ability in Patients With Hip Joint Diseases), which is not on this map. Cited by 51 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 6 pooled it
8.1field-weighted citation impact, top 2% of its field
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.

NCT07147530 phase4recruitingnot on this mapstarted 2025, after this paper: background citation

Study to Verify Effectiveness and Safety of the Electrically Powered Orthopedic Exercise Device on Gait Ability in Patients With Hip Joint Diseases: Investigator Initiated, Single Center, Single Group Clinical Trial

TypeinterventionalSponsorYonsei UniversityRan2025 to 2026Enrolled30ConditionsHip DiseaseArmsElectrically Powered Orthopedic Exercise Device
3 · Its place in the literature

Who cites it

51 citing papers in PubMed, 6 syntheses or guidelines pooled it, 106 citations in OpenAlex.

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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

9 authors at 4 institutions in 1 country.

Andy JudgeOxford NIHR Musculoskeletal Biomedical Research Unit, Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Headington, Oxford, UK.
Nigel K Arden
Rajbir N Batra
Geraint Thomas
David Beard
M Kassim Javaid
Cyrus Cooper
David Murray
Exeter Primary Outcomes Study (EPOS) group
University of Oxford · GBUniversity of Southampton · GBNIHR Oxford Musculoskeletal Biomedical Research Centre · GBSouthampton General Hospital · GB

Funding

Department of Health RP-PG-0407-10064Medical Research Council G0400491Medical Research Council MC_U147585819Medical Research Council MC_U147585824Medical Research Council MC_UP_A620_1014
6 · The paper itself

Abstract

objectivesTo identify patient characteristics and surgical factors associated with patient-reported outcomes over 5 years following primary total hip replacement (THR).

designProspective cohort study.

settingSeven hospitals across England and Scotland.

participants1431 primary hip replacements for osteoarthritis.

main outcome measuresThe Oxford Hip Score (OHS) was collected preoperatively and each year up to 5 years postoperatively. Repeated measures such as linear regression modelling are used to identify patient and surgical predictors of outcome and describe trends over time.

resultsThe majority of patients demonstrated substantial improvement in pain/function in the first year after surgery-between 1 and 5 years follow-up, there was neither further improvement nor decline. The strongest determinant of attained postoperative OHS was the preoperative OHS-those with worse preoperative pain/function had worse postoperative pain/function. Other predictors with small but significant effects included: femoral component offset-women with an offset of 44 or more had better outcomes; age-compared to those aged 50-60, younger (age <50) and older patients (age >60) had worse outcome, increasing body mass index (BMI), more coexisting diseases and worse Short Form 36 mental health (MH) was related to worse postoperative pain/function. Assessment of change in OHS between preoperative  and postoperative assessments revealed that patients achieved substantial and clinically relevant symptomatic improvement (change), regardless of variation in these patient and surgical factors.

conclusionsPatients received substantial benefit from surgery, regardless of their preoperative assessments and surgical characteristics (baseline pain/function, age, BMI, comorbidities, MH and femoral component offset). Further research is needed to identify other factors that can improve our ability to identify patients at risk of poor outcomes from THR surgery.

Identifiers

PMID23457332
PMCPMC3612787
OpenAlexW2106648617

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.