Structural validity of a self-report concussion-related symptom scale
Purpose: This study evaluated the factorial validity of a self-report measure of concussion-related symptom severity among a large sample of male, high-school athletes.
Methods: Participants (N = 1089) were nonconcussed, male, high-school football players. All participants completed a single baseline self-report measure of concussion-related symptom severity, namely the graded symptom checklist (GSC). We tested the factorial validity of the measure with confirmatory factor analysis using LISREL 8.50.
Results: The analysis indicated that a theoretically derived, three-factor model provided a good, but not excellent, fit for the 16-item GSC. Excellent model-data fit was demonstrated for the three-factor model for a 9-item version of the GSC. In both instances, the three factors were best described by a single second-order factor, namely concussion symptomatology.
Conclusions: This study provides additional evidence for the factorial validity of a summative self-reported measure of concussion-related symptoms. The factor structure represents a cohesive group of nine symptoms that can be explained by three underlying latent variables, namely somatic symptoms, neurobehavioral symptoms, and cognitive symptoms, subsumed under a single higher-order factor, namely concussion symptoms.
Medicine and Science in Sport and Exercise
Wolters Kluwer Health
Piland SG, Motl RW, Guskiewicz KM, McCrea M, Ferrara MS. (2006). Structural validity of a self-report concussion-related symptom scale. Medicine and Science in Sport and Exercise, 38:27-32
Copyright © 2006, (C)2006The American College of Sports Medicine