Table 4:

Statistical report comparing means of susceptibility values within injured and control groups^a

ROI	Susceptibility Group Differences (Injured vs Control)						RTP vs 24-Hour Suscept
	24 Hours		8 Days		6 Months
	P	D	P	D	P	D	P	ρ
White matter	.032b	0.65b	.001b	1.01b	.463	0.25	.022b	0.55
Gray matter	.980	−0.01	.255	−0.34	.382	−0.30	.146	−0.26
L ATR	.017b	0.72b	.069	0.55	.735	−0.11	.146	0.37
R cing (hipp)	.072	0.53	.011b,c	0.79b	.012b	0.91b	.015b,c	0.58b
Forceps minor	.017b	0.75b	.008b,c	0.82b	.738	0.11	.989	<0.01
L IFOF	.127	0.46	.037b,c	0.63b	.730	0.12	.015b,c	0.58b
R IFOF	.073	0.55	.019b,c	0.72b	.783	0.09	.480	0.18
L ILF	.194	0.39	.027b,c	0.67b	.650	0.15	.146	0.37
R ILF	.187	0.40	.034b,c	0.64b	.814	0.08	.003b,c	0.67b
L SLF	.334	0.28	.014b,c	0.75b	.550	0.21	.019b,c	0.56b
R SLF	.021b	0.72b	.002b,c	1.00b	.819	0.08	.015b,c	0.58b
L SLF (temp)	.847	0.06	.035b,c	0.64b	.510	0.23	.034b,c	0.52b
R SLF (temp)	.010b	0.82b	.007b,c	0.83b	.576	0.19	.412	0.21

Note:—ATR indicates anterior thalamic radiation; cing, cingulum; hipp, hippocampus; IFOF, inferior fronto-occipital fasciculus; ILF, inferior longitudinal fasciculus; SLF, superior longitudinal fasciculus; temp, temporal; RTP, return to play temporal duration; D, effect sizes; Suscept, susceptibility; L, left; R, right.

^aWhite matter regions showing significant trends and the global gray matter compartment are shown. At each visit, group differences are characterized with P values computed using 2-tailed independent samples t tests and effect sizes are computed using the Cohen D. The Pearson correlation of RTP temporal duration vs 24-hour susceptibility values for individual injured subjects is also presented. P values and effect sizes (ρ) are displayed. P values for the subregional analyses are reported without multiple-comparison corrections.

^bEffects that showed statistical significance (P < .05).

^cStatistically significant after correction for multiple comparisons.