Related Experiment Video
Updated: Jul 5, 2025
Objectively Assessing Sports Concussion Utilizing Visual Evoked Potentials
Published on: April 27, 2021
Reliable Change Indices for the Serial Administration of the Concussion Clinical Profiles Screening Tool
Kori J Durfee1, Philip Schatz2, Anthony P Kontos3
1Department of Health, Human Performance and Recreation/Office for Sport Concussion Research, University of Arkansas, Fayetteville.
Context:
The Concussion Clinical Profiles Screening Tool (CP Screen) self-report concussion symptom inventory is often administered at weekly intervals. However, 1-week reliable change indices (RCIs) for clinical cutoffs and the test-retest reliability of the CP Screen are unknown.
Objective:
To document RCI cutoff scores and 1-week test-retest reliability for each profile and modifier of the CP Screen for men and women.
Design:
Case series.
Setting:
A large US university.
Patients Or Other Participants:
One hundred seventy-three healthy college students.
Main Outcome Measure(S):
Participants completed 2 administrations of the CP Screen 7 days apart. The CP Screen items yielded 5 clinical profiles and 2 modifiers. Spearman ρ coefficients (rs), intraclass correlation coefficients (ICCs), single measures, and unbiased estimates of reliability (UERs) were used to assess test-retest reliability. Wilcoxon signed-rank tests assessed differences across time. Reliable change index values and cutoff scores are provided at 90%/95% CIs. All analyses were performed for the total sample and separately for men and women.
Results:
Reliable change index cutoffs for clinically significant change (increase/decrease) at a 90% CI for men were as follows: ocular, vestibular >2/>4; anxiety/mood, cognitive/fatigue, and migraine >3/>3; sleep >4/>6; and neck >2/>2. Reliable change index cutoffs for clinically significant change (increase/decrease) at a 90% CI for women were as follows: anxiety/mood ≥2/≥4; cognitive/fatigue, migraine, ocular, vestibular, and sleep ≥3/≥3; and neck ≥1/≥1. Correlations for the CP Screen ranged from 0.51 (migraine) to 0.79 (anxiety/mood) for the total sample, from 0.48 (migraine) to 0.84 (vestibular) for men, and from 0.51 (migraine) to 0.77 (ocular) for women. Test-retest indices for each profile and modifier were moderate to good for the total sample (ICC, 0.64-0.82; UER, 0.79-0.90), men (ICC, 0.60-0.87; UER, 0.76-0.94), and women (ICC, 0.64-0.80; UER, 0.78-0.89).
Conclusion:
The CP Screen is reliable and stable across a 1-week interval, and established RCIs for men and women can help identify meaningful change throughout recovery.
