Evidence map›Paper›PMID 32201993›Full record

ArticleScandinavian journal of medicine & science in sports2020

The relationship between cam morphology and hip and groin symptoms and signs in young male football players.

Pim van Klij, Abida Z Ginai, Marinus P Heijboer, Jan A N Verhaar, Jan H Waarsing, Rintje Agricola

Abstract read
In one paragraph

Article in Scandinavian journal of medicine & science in sports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–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

14 citing papers in PubMed.

  1. Article
  2. Review
  3. Hip internal rotation restriction and heel raise mechanics as risk factors for Jones fractures in youth football players.Asia-Pacific journal of sports medicine, arthroscopy, rehabilitation and technology · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Review
  8. Less hip range of motion is associated with a greater alpha angle in people with longstanding hip and groin pain.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2021
    Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. 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.

Pim van KlijDepartment of Orthopaedic Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.ORCID https://orcid.org/0000-0002-6515-8322
Abida Z GinaiDepartment of Radiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.
Marinus P HeijboerDepartment of Orthopaedic Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.
Jan A N VerhaarDepartment of Orthopaedic Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.ORCID https://orcid.org/0000-0003-3016-9600
Jan H WaarsingDepartment of Orthopaedic Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.
Rintje AgricolaDepartment of Orthopaedic Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, the Netherlands.ORCID https://orcid.org/0000-0002-0645-093X

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundConflicting and limited high-quality prospective data are available on the associations between cam morphology and hip and groin symptoms and range of motion (ROM).

objectivesThis cross-sectional cohort study investigated associations between cam morphology presence, size and duration and symptoms and ROM.

methodsAcademy male football players (n = 49, 17-24 years) were included. Standardized antero-posterior pelvic and frog-leg lateral radiographs were obtained at baseline, 2.5- and 5-year follow-up. The femoral head-neck junction was quantified by: Visual score. Cam morphology (flattening or prominence), large cam (prominence). Alpha angle. Cam morphology (≥60°), large cam (≥78°). Cam morphology duration was defined as long (first present at baseline) or short (only from 2.5- to 5-year follow-up). Current symptoms at 5-year follow-up were assessed using a hip and groin pain question and by the "Hip and Groin Outcome Score" (HAGOS). HAGOS scores were categorized into: most symptoms (≥2 domains in lowest interquartile range [IQR]), least symptoms (≥2 domains in highest IQR). Hip ROM was measured by goniometry at 5-year follow-up.

resultsLarge cam morphology based on visual score was associated with hip and groin pain (23.8% vs. 7.1%, OR: 3.17, CI: [1.15-8.70], P = .026), but not with HAGOS scores. Cam morphology presence, size, and duration were associated with limited flexion of around 6° and/or 3° to 6° for internal rotation.

conclusionCam morphology presence, size, and duration were associated with limited hip flexion and/or internal rotation, but differences might not exceed the minimal clinical important difference. Whether cam morphology results in symptoms is uncertain.

Indexed as

SoccerAdolescentAdultAthletesGroinHip JointHumansMaleMusculoskeletal PainPain MeasurementRange of Motion, ArticularSurveys and QuestionnairesYoung AdultFAI syndromefemoroacetabular impingementpainrange of motion

Identifiers

PMID32201993
PMCPMC7317829

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LicenceCC BY-NC-ND
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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.