Evidence map›Paper›PMID 33507800›Full record

ArticleThe American journal of sports medicine2021

Patient-Reported Outcomes and Knee Mechanics Correlate With Patellofemoral Deep Cartilage UTE-T2* 2 Years After Anterior Cruciate Ligament Reconstruction.

Ashley A Williams, Jennifer C Erhart-Hledik, Jessica L Asay, Gordhan B Mahtani, Matthew R Titchenal, Amelie M Lutz, Thomas P Andriacchi, Constance R Chu

Open access · greenAbstract read
In one paragraph

Article in The American journal of sports medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 25 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Hip Joint Loading During Walking Is Associated With Cartilage Defect Severity in Young Adult Football Players With Hip/Groin Pain.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2026
    Article
  4. Article
  5. Article
  6. Article
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  8. Review
  9. Article
  10. Review
  11. Article
  12. Patellofemoral joint loading and early osteoarthritis after ACL reconstruction.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2023
    Article
  13. Review
  14. Article
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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

8 authors at 2 institutions in 1 country.

Ashley A WilliamsDepartment of Orthopaedic Surgery, Stanford University, Stanford, California, USA.
Jennifer C Erhart-HledikDepartment of Orthopaedic Surgery, Stanford University, Stanford, California, USA.
Jessica L AsayVeterans Affairs Palo Alto Healthcare System, Palo Alto, California, USA.
Gordhan B MahtaniDepartment of Orthopaedic Surgery, Stanford University, Stanford, California, USA.
Matthew R TitchenalInSciTech, Inc, Los Altos, California, USA.
Amelie M LutzDepartment of Radiology, Stanford University, Stanford, California, USA.
Thomas P AndriacchiDepartment of Orthopaedic Surgery, Stanford University, Stanford, California, USA.
Constance R ChuDepartment of Orthopaedic Surgery, Stanford University, Stanford, California, USA.
Stanford University · USVA Palo Alto Health Care System · US

Funding

Enhanced Clinical Diagnosis of Early OsteoarthritisR01AR052784 · NIAMS · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI CHU, CONSTANCE R · 2006 to 2015
$4.1M
NIAMS NIH HHS R01 AR052784
6 · The paper itself

Abstract

backgroundPatellofemoral joint degeneration and dysfunction after anterior cruciate ligament reconstruction (ACLR) are increasingly recognized as contributors to poor clinical outcomes. PURPOSE: To determine if greater deep cartilage matrix disruption at 2 years after ACLR, as assessed by elevated patellofemoral magnetic resonance imaging (MRI) ultrashort echo time-enhanced T2* (UTE-T2*), is correlated with (1) worse patient-reported knee function and pain and (2) gait metrics related to patellofemoral tracking and loading, such as greater external rotation of the tibia at heel strike, reduced knee flexion moment (as a surrogate of quadriceps function), and greater knee flexion angle at heel strike. STUDY

designCross-sectional study; Level of evidence, 3.

methodsMRI UTE-T2* relaxation times in patellar and trochlear deep cartilage were compared with patient-reported outcomes and ambulatory gait metrics in 60 patients with ACLR at 2 years after reconstruction. ACLR gait metrics were compared with those of 60 uninjured reference patients matched by age, body mass index, and sex. ACLR UTE-T2* values were compared with those of 20 uninjured reference patients.

resultsHigher trochlear UTE-T2* values were associated with worse Knee injury and Osteoarthritis Outcome Scores (KOOS) Sport/Recreation subscale scores (rho = -0.32;

conclusionPatellofemoral deep cartilage matrix disruption, as assessed by MRI UTE-T2*, was associated with reduced sports and recreational function and with gait metrics reflective of altered patellofemoral loading. As such, the findings provide new mechanistic information important to improving clinical outcomes related to patellofemoral dysfunction after ACLR.

Indexed as

Anterior Cruciate Ligament InjuriesAnterior Cruciate Ligament ReconstructionCross-Sectional StudiesHumansKnee JointMagnetic Resonance ImagingPatient Reported Outcome Measuresanterior cruciate ligament reconstruction (ACLR)kinematicsmagnetic resonance imaging (MRI)patellofemoral cartilageultrashort echo time-enhanced T2* mapping (UTE-T2* mapping)

Identifiers

PMID33507800
PMCPMC12320895
OpenAlexW3124718763

What OpenQuestion holds

Textmetadata
LicenceTDM
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.