A-96 Stability of ImPACT’s Latent Structure from Baseline to Post Concussion Assessment

Abstract Objective ImPACT is commonly used for sport-concussion management. Baseline and post-concussion tests serve as within-athlete comparisons return-to-play decision-making. Previous literature has questioned whether ImPACT’s five composites accurately represent the internal structure of its cognitive scores. A recent alternative four-factor strong confirmatory evidence baseline scores (Maietta et al., doi:10.1037/pas0001014). The present study examined stability these constructs post-concussion. Method current utilized a case-matched design (age, sex, sport category) to select sample 3560 high school athletes’ (n = 1780) assessments. Multi-group CFA first-order, hierarchical, bifactor models was conducted assess measurement invariance (configural, metric, scalar, residual invariance) between samples. Change in comparative fit indices interpreted primary indicator model invariance. Results composite structure, well hierarchical models, exhibited inadequate data. demonstrated superior good sample. across injury status (baseline post-concussion). Conclusion Given that are decision-making, it important they psychometrically sound. Recent suggests not an adequate representation constructs. Findings support validity despite status, suggesting assessable at both pre- Additional research needed determine implications findings tracking change following sport-related concussion making decisions.