TABLE 2:

Mean metabolite ratios

MRSI Ratio	Control (n = 9)	TBI (n = 40)	Normal-Appearing Brain (n = 40)	Visible Hemorrhage (n = 33)	P Value*
NAA/Cr	1.86 ± 0.11	1.50 ± 0.29†	1.55 ± 0.52‡	1.33 ± 0.56†	.46
NAA/Cho	2.10 ± 0.19	1.44 ± 0.34†	1.52 ± 0.58†	1.16 ± 0.50†	.001†
Cho/Cr	0.93 ± 0.07	1.12 ± 0.13†	1.10 ± 0.39‡	1.24 ± 0.51†	.00†

Note.—Ratios are average of mean ratios from each patient. Seven patients did not have voxels containing hemorrhage in the brain section sampled with MRSI.

^*Normal versus hemorrhage.

^†P ≤ .001 compared with controls, one-way ANOVA and post-hoc Bonferroni test.

^‡P ≤ 0.05 level compared to controls, one-way ANOVA and post-hoc Bonferroni test.