Clinical Utility of the Japanese Version of the Kerlan-Jobe Orthopaedic Clinic Shoulder and Elbow Score for Detecting Upper Extremity Dysfunction in High-School Baseball Players.
Yudai Nagano, Masashi Kawabata, Sohei Shimizu and 3 others
PMID 41488378WHAT IT FOUND
High school baseball players who reported symptoms had lower J-KJOC scores than asymptomatic players.
A cutoff of 87.6 points helped identify symptomatic players, while physical measures did not separate the groups.
Key findings
01J-KJOC scores were 90.3 in asymptomatic players, 71.2 in symptomatic but active players, and 57.2 in inactive symptomatic players, and the differences were significant (p < 0.01).
02A J-KJOC cutoff of 87.6 points distinguished symptomatic from asymptomatic players with sensitivity 81.5% and specificity 72.8%.
03No significant differences were found among groups in shoulder range of motion, shoulder strength, grip strength, or pinch strength.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
All players came from one high-school baseball team in Japan, so the cutoff may not apply to other teams, ages, or countries. The inactive symptomatic group had only 4 players, so findings for that group are preliminary. The number of symptomatic players was small, which may have limited the regression analyses. Symptom groups were defined using the J-KJOC, and the same score was used to derive the cutoff, so this was not an independent test of the questionnaire against a separate symptom classification. The study was cross-sectional, so it did not follow players over time to show whether screening prevented injury.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not read the 87.6 cutoff as proof that a low J-KJOC score predicts injury or that the questionnaire replaces physical examination. The study was cross-sectional, groups were classified using the same questionnaire, and all players came from one team.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →