Objective To examine the relationship between aspects of the Sport Concussion Assessment Tool 3 (SCAT3), the King-Devick Test (KDT) and Three-Dimensional Multiple Object Tracking (3D MOT) at baseline.

Design Prospective design.

Setting University resarch laboratory.

Participants A convenience sample of 304 healthy, non-concussed, athletic participants (101 females, 203 males) ranging in age from 11.69 20.41 years (mean age=16.05 + 4.36) were included in the analysis.

Outcome measures Participants completed the SCAT3, KDT and 3D MOT in a single visit. A regression analysis was performed to see if any aspects of the SCAT3 (immediate memory (IM), coordination (COOR), and delayed recall (DR)), and/or the KDT, predicted 3D MOT scores.

Main results A multiple linear regression was calculated to see if KDT, IM, DR and COOR predicted the speed of the 3D MOT. The assumptions of multivariate regression were tested and corrections were applied as needed. Using the stepwise method, it was found that KD, DR and COOR explain a significant amount of the variance in the speed of the 3D MOT (F(3, 256))=11.82, p<0.000 with an R2 of 0.12. Participants predicted 3D MOT score is equal to 1.05 –0.01 KD + 0.07 DR + 0.23 COOR, where KDT is measured in seconds, DR is measured in units between 0–5, and COOR is measured as 1=successful, 0?= not successful. The analysis shows that KD (Beta=–0.01, p?< 0.000), DR (Beta=0.07, p<0.02), and COOR (Beta=0.23, p<0.03), were significant predictors of 3D MOT scores.

Conclusions Results suggest that King Devick Test, Delayed Recall, and Coordination tests share predictive validity of the 3D MOT in an athletic population between the ages of 6-29 at baseline. Future studies should examine these relationships post-injury and through concussion recovery. This could provide valuable information to better inform clinicians responsible for making Return to Play determinations.

Competing interests None.