Table 3.

Hypointensity Burden Group Comparisons: Single Concussion Versus Multiple Concussion.

Region	Single concussion,	Multiple concussions,	F or χ 2	P value	ηp 2
	mean (SD) (n = 14)	mean (SD) (n = 21)
Whole brain	1.6 × 10–4 (3.2 × 10–5)	1.5 × 10–4 (1.8 × 10–5)	.88	.35	.03
Amygdala	5.7 × 10–5 (5.5 × 10–5)	7.3 × 10–5 (9.0 × 10–5)	.40	.53	.01
Caudate	1.7 × 10–4 (1.3 × 10–4)	1.8 × 10–4 (1.0 × 10–4)	.01	.92	.000
Cerebellum	1.1 × 10–4 (4.5 × 10–5)	9.4 × 10–5 (2.6 × 10–5)	1.4	.24	.04
Hippocampus	1.6 × 10–4 (1.4 × 10–4)	1.2 × 10–4 (1.2 × 10–4)	1.3	.26	.04
Insula	1.9 × 10–4 (1.1 × 10–4)	2.0 × 10–4 (9.2 × 10–5)	.38	.54	.01
Pallidum	6.4 × 10–4 (6.1 × 10–4)	9.8 × 10–4 (7.6 × 10–4)	2.3	.14	.07
Putamen	9.8 × 10–5 (1.0 × 10–4)	6.5 × 10–5 (6.7 × 10–5)	1.5	.22	.05
Thalamus	1.2 × 10–4 (6.4 × 10–5)	9.8 × 10–5 (8.1 × 10–5)	1.4	.25	.04

Abbreviation: SD, standard deviation.