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Updated: Jan 29, 2026

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Clinical Cut Point for the Postconcussion Symptom Inventory Following Adolescent Concussion.

Catherine C Donahue1,2, Katherine L Smulligan3, Mathew J Wingerson1,2

  • 1Department of Orthopedics, University of Colorado School of Medicine, Aurora, CO.

Medicine and Science in Sports and Exercise
|January 28, 2026
PubMed
Summary
This summary is machine-generated.

A Post Concussion Symptom Inventory (PCSI) score of 23 effectively distinguishes adolescents with recent concussions from uninjured peers. This validated cut point aids in accurate concussion diagnosis and management in the subacute phase.

Keywords:
ADOLESCENTSCLINICAL THRESHOLDSYMPTOM SEVERITY

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Area of Science:

  • Sports Medicine
  • Neurology
  • Pediatrics

Background:

  • The Post Concussion Symptom Inventory (PCSI) is crucial for assessing concussion severity in research and clinical practice.
  • A validated clinical cut point for the PCSI is lacking to differentiate concussed adolescents from controls.
  • Establishing a reliable PCSI cut point is essential for accurate concussion diagnosis and management decisions.

Purpose of the Study:

  • To establish a clinically validated cut point for the Post Concussion Symptom Inventory (PCSI).
  • To determine the sensitivity, specificity, and classification accuracy of the PCSI for identifying recent concussions in adolescents.

Main Methods:

  • Adolescents with recent concussions (within 21 days) and uninjured controls completed the PCSI.
  • Independent samples t-tests and multivariable logistic regression were used to compare PCSI scores between groups.
  • Receiver operator characteristic (ROC) curve analysis was performed to determine the optimal PCSI cut point.

Main Results:

  • The study included 153 adolescents with concussions and 200 uninjured controls.
  • Adolescents with concussions reported significantly higher PCSI scores (47.4±26.8) compared to controls (20.9±19.4).
  • A PCSI cut point of 23 demonstrated 68% sensitivity and 83% specificity, correctly classifying 74% of participants.

Conclusions:

  • A PCSI cut point of 23 is proposed to effectively distinguish adolescents with and without recent concussions.
  • This cut point may enhance the accuracy of identifying suspected concussions in the subacute period post-injury.
  • The findings support the clinical utility of the PCSI in adolescent concussion assessment.