Evidence map›Paper›PMID 33530847›Full record

ArticleSports health

Confidence to Return to Play After Anterior Cruciate Ligament Reconstruction Is Influenced by Quadriceps Strength Symmetry and Injury Mechanism.

Francesco Della Villa, Rachel K Straub, Bert Mandelbaum, Christopher M Powers

Open access · greenAbstract read
In one paragraph

Article in Sports health. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 10% 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

12 citing papers in PubMed, 1 synthesis or guideline pooled it, 20 citations in OpenAlex.

  1. Pooled it
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  6. Administering the ACL-RSI Before or After ACL Functional Testing: Does It Matter?International journal of sports physical therapy · 2025
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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

4 authors at 2 institutions in 1 country.

Francesco Della VillaEducation and Research Department, Isokinetic Medical Group FIFA Medical Centre of Excellence, Bologna, Italy.
Rachel K StraubDivision of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, California.
Bert MandelbaumCedars Sinai Kerlan Jobe Institute, Santa Monica, California.
Christopher M PowersDivision of Biokinesiology & Physical Therapy, University of Southern California, Los Angeles, California.
University of Southern California · USCedars-Sinai Kerlan-Jobe Institute · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundAlthough the restoration of quadriceps strength symmetry is a primary rehabilitation goal after anterior cruciate ligament reconstruction (ACLR), little is known about the potential relationship between quadriceps strength symmetry and psychological readiness to return to play (RTP). HYPOTHESIS: Quadriceps strength symmetry will be associated with psychological readiness to RTP after ACLR. Secondarily, injury mechanism will influence the association between quadriceps strength and psychological readiness to RTP. STUDY

designRetrospective cohort. LEVEL OF EVIDENCE: Level 3 (cohort study).

methodsA total of 78 female patients completed strength testing and the Injury-Psychological Readiness to Return to Sport (I-PRRS) scale at an outpatient clinical facility as part of return to sport testing after ACLR. Linear regression analysis was used to assess the relationship between the I-PRRS and the independent variables of interest (quadriceps strength symmetry and injury mechanism).

resultsFor all patients combined, a significant symmetry × mechanism interaction was found. When split by injury mechanism, a significant linear relationship was found between quadriceps strength symmetry and the I-PRRS score in patients who experienced a noncontact injury (n = 55;

conclusionGreater quadriceps strength symmetry was associated with greater psychological readiness to RTP in female athletes after ACLR. This relationship, however, was present only in those who experienced a noncontact injury. CLINICAL RELEVANCE: Clinicians should consider both the physical and the psychological factors in assessing a patient's readiness to RTP. This may be particularly important for those who have experienced an ACL tear through a noncontact mechanism.

Indexed as

Muscle StrengthAdolescentAdultAnterior Cruciate Ligament InjuriesAnterior Cruciate Ligament ReconstructionAthletic InjuriesFemaleHumansInternal-External ControlQuadriceps MuscleRetrospective StudiesReturn to SportSelf ReportYoung Adultanterior cruciate ligamentinjury mechanismpsychological readinessquadriceps strength

Identifiers

PMID33530847
PMCPMC8083156
OpenAlexW3129013496

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.