Table 2

 ImPACT cognitive output scores by previous history of concussion (N  =  264)

Self reported concussion historyMemory composite (verbal)Memory composite (visual)Visual motor speedReaction time
Values are mean (SD).
Zero (n = 173)0.87 (0.09)0.76 (0.13)36.99 (7.30)0.55 (0.07)
One (n = 62)0.86 (0.09)0.75 (0.13)36.43 (7.53)0.56 (0.07)
Two (n = 18)0.88 (0.07)0.77 (0.15)33.95 (5.74)0.63 (0.14)
Three (n = 11)0.93 (0.08)0.81 (0.16)39.91 (11.99)0.57 (0.18)