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		RTP vs 24-Hour Suscept
	P	D	P	D	P	D	P	ρ
White matter	.032^{^b}	0.65^{^b}	.001^{^b}	1.01^{^b}	.463	0.25	.022^{^b}	0.55
Gray matter	.980	−0.01	.255	−0.34	.382	−0.30	.146	−0.26
L ATR	.017^{^b}	0.72^{^b}	.069	0.55	.735	−0.11	.146	0.37
R cing (hipp)	.072	0.53	.011^{^b,^c}	0.79^{^b}	.012^{^b}	0.91^{^b}	.015^{^b,^c}	0.58^{^b}
Forceps minor	.017^{^b}	0.75^{^b}	.008^{^b,^c}	0.82^{^b}	.738	0.11	.989	<0.01
L IFOF	.127	0.46	.037^{^b,^c}	0.63^{^b}	.730	0.12	.015^{^b,^c}	0.58^{^b}
R IFOF	.073	0.55	.019^{^b,^c}	0.72^{^b}	.783	0.09	.480	0.18
L ILF	.194	0.39	.027^{^b,^c}	0.67^{^b}	.650	0.15	.146	0.37
R ILF	.187	0.40	.034^{^b,^c}	0.64^{^b}	.814	0.08	.003^{^b,^c}	0.67^{^b}
L SLF	.334	0.28	.014^{^b,^c}	0.75^{^b}	.550	0.21	.019^{^b,^c}	0.56^{^b}
R SLF	.021^{^b}	0.72^{^b}	.002^{^b,^c}	1.00^{^b}	.819	0.08	.015^{^b,^c}	0.58^{^b}
L SLF (temp)	.847	0.06	.035^{^b,^c}	0.64^{^b}	.510	0.23	.034^{^b,^c}	0.52^{^b}
R SLF (temp)	.010^{^b}	0.82^{^b}	.007^{^b,^c}	0.83^{^b}	.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.
↵a White 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.
↵b Effects that showed statistical significance (P < .05).
↵c Statistically significant after correction for multiple comparisons.