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Table 4: Relationship between head impact exposure and change in connectivity and cognitive measures
Change in ImPACT Composite (Post minus Pre) (n = 58) Head Impact Exposure Metric (RWEcp)^{^a}
Spearman Rho P Value
Verbal Memory composite –0.15 .26
Visual Memory composite 0.02 .9
Visual Motor composite 0.01 .95
Reaction Time composite^{^a} 0.29^b .03^b
Total Symptom Score^{^a} 0.36 ^b .006^b
Change in connectivity measure (Post minus Pre) (n = 51)    
IHC of dACC –0.08 .57
Within-SN connectivity 0.04 .77
Note:—Post indicates postseason; Pre, preseason.
↵a These variables are non-normally distributed.
b Statistically significant.

Change in ImPACT Composite (Post minus Pre) (n = 58)	Head Impact Exposure Metric (RWEcp)^{^a}
Change in ImPACT Composite (Post minus Pre) (n = 58)	Spearman Rho	P Value
Verbal Memory composite	–0.15	.26
Visual Memory composite	0.02	.9
Visual Motor composite	0.01	.95
Reaction Time composite^{^a}	0.29^b	.03^b
Total Symptom Score^{^a}	0.36 ^b	.006^b
Change in connectivity measure (Post minus Pre) (n = 51)
IHC of dACC	–0.08	.57
Within-SN connectivity	0.04	.77