Evidence map›Paper›PMID 40620725›Full record

ArticleOrthopaedic journal of sports medicine2025

The Association between Excessive Glenohumeral External Rotation and Risk for Shoulder and Elbow Injury in Left-Handed High School Baseball Pitchers: A Prospective Cohort Study.

Hitoshi Shitara, Tsuyoshi Tajika, Tsuyoshi Ichinose, Tsuyoshi Sasaki, Noritaka Hamano, Masataka Kamiyama, Ryosuke Miyamoto, Kurumi Nakase, Fukuhisa Ino, Takuma Kachi and 5 more

Abstract read
In one paragraph

Article in Orthopaedic journal of sports medicine, 2025. 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
–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

1 citing paper in PubMed.

  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

15 authors.

Hitoshi ShitaraDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.ORCID https://orcid.org/0000-0003-3547-0718
Tsuyoshi TajikaDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.ORCID https://orcid.org/0000-0003-1021-5315
Tsuyoshi IchinoseDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Tsuyoshi SasakiDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Noritaka HamanoDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Masataka KamiyamaDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Ryosuke MiyamotoDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Kurumi NakaseDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Fukuhisa InoDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Takuma KachiDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Yuhei HatoriDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Koichiro YanaiDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Atsushi YamamotoDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Kenji TakagishiDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.
Hirotaka ChikudaDepartment of Orthopaedic Surgery, Gunma University Graduate School of Medicine, Maebashi, Gunma Prefecture, Japan.ORCID https://orcid.org/0000-0002-7913-1542

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Left-handed baseball pitchers exhibit unique throwing biomechanics, yet the risk factors for shoulder and elbow injuries in this population remain unclear. Purpose: To prospectively investigate preseason risk factors for shoulder and elbow injuries in left-handed high school baseball pitchers. Study Design: Cohort study; Level of evidence, 2. Methods: A total of 160 left-handed high school baseball pitchers were enrolled. Preseason evaluations included age, height, weight, shoulder muscle strength, and range of motion of the shoulder and elbow. Participants completed a self-recorded questionnaire on shoulder and elbow pain and associated pitching limitations during the subsequent season. Participants were categorized into the noninjured or injured group. The Mann-Whitney Results: Shoulder and elbow injuries occurred in 27 participants (16.9%). The injured group had significantly greater abduction-external rotation (ABER) in the dominant shoulder (114.8°± 11.9° vs 107.5°± 13.0°; Conclusion: Increased shoulder ABER was significantly associated with shoulder and elbow injuries among left-handed high school baseball pitchers. Pitchers with ABER ≥109° are at higher risk.

Indexed as

baseball pitching mechanicsleft-handed pitchersrange of motionshoulder abduction–external rotation (ABER)shoulder and elbow injuries

Identifiers

PMID40620725
PMCPMC12227860

What OpenQuestion holds

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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.