Evidence map›Paper›PMID 33219821›Full record

ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2021

Sagittal patellar flexion angle measurement determines greater incidence of patella alta in patellar tendinopathy patients.

Kimberley Kai Lun, Stephen Bennie, James D Crowley, Phil Lucas, Mervyn Cross, William R Walsh, Michael J Dan

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In one paragraph

Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
0.2field-weighted citation impact, top 52% 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.

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

1 citing paper in PubMed, 3 citations in OpenAlex.

  1. 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

7 authors at 3 institutions in 2 countries.

Kimberley Kai LunSurgical and Orthopaedic Research Laboratories, Prince of Wales Clinical School, University of New South Wales, Sydney, Australia.
Stephen BennieSurgical and Orthopaedic Research Laboratories, Prince of Wales Clinical School, University of New South Wales, Sydney, Australia.
James D CrowleySurgical and Orthopaedic Research Laboratories, Prince of Wales Clinical School, University of New South Wales, Sydney, Australia.
Phil LucasPRP Diagnostic Imaging, Sydney, Australia.
Mervyn CrossThe Stadium Sports Medicine Clinic, Sydney, Australia.
William R WalshSurgical and Orthopaedic Research Laboratories, Prince of Wales Clinical School, University of New South Wales, Sydney, Australia.
Michael J DanSurgical and Orthopaedic Research Laboratories, Prince of Wales Clinical School, University of New South Wales, Sydney, Australia. michaeldan@hotmail.com.ORCID http://orcid.org/0000-0002-3193-8048
UNSW Sydney · AUMedical Diagnostic Laboratories (United States) · USSports Medicine Australia · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeThe objective of this study was to compare patellar height and patella alta between a control cohort and patients with patellar tendinopathy by the sagittal patellar flexion angle (SPFA) measurement.

methodsMagnetic resonance imaging (MRI) scans of the knee were obtained from a sports imaging facility and screened to select patients with anterior knee pain. This symptomatic group was divided into two patient cohorts: those with and without MRI features of patellar tendinopathy. Lateral knee radiographs were reviewed and SPFA, knee flexion angle and Insall-Salvati ratio (IS) were measured from the radiographs by two independent reviewers.

resultsA total of 99 patients consisting of 48 patellar tendinopathy patients and 51 control patients were included. There was a significantly higher mean patellar height (p = 0.002, d = 0.639) and a greater patella alta incidence in the patellar tendinopathy cohort (25.0%) compared to the controls (3.9%) (p = 0.022, d = 0.312). Insall-Salvati ratio measurements showed no difference in patella alta incidence between tendinopathy and control cohorts. There was excellent inter- and intra-observer reliability of SPFA measurements (ICC 0.99).

conclusionThis is the first study to demonstrate a greater incidence of patella alta in patellar tendinopathy patients compared to controls. A greater patella alta incidence amongst patellar tendinopathy patients as defined by SPFA was found to be clinically relevant, as it suggests these patients may comprise the recalcitrant patient subgroup who do not improve with current surgical intervention and may therefore benefit from a biomechanical surgical solution. LEVEL OF EVIDENCE: III.

Indexed as

PatellaTendinopathyHumansIncidenceRange of Motion, ArticularReproducibility of ResultsPatella altaPatellar heightPatellar tendinopathySagittal kinematics

Identifiers

PMID33219821
OpenAlexW3104985060

What OpenQuestion holds

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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.