Table 3.

Pair-wise Comparisons Comparing Difference in GABA+ Levels Between Age- and Sex- matched Individuals From Different Pain Groups.

	Region	Pain A Mean± SD	Pain B Mean± SD	Pairwise Difference ± SD	Zscore	P value
Migraine (A) versus Whiplash (B) n = 14	PCG	4.83 ± 0.64	4.69 ± 0.40	0.14 ± 0.65	−0.47	.38
	ACC	4.43 ± 0.36	4.62 ± 0.78	−0.18 ± 0.78	−0.72	.38
	Thal	5.61 ± 1.02	6.27 ± 0.88	−0.66 ± 1.43	−1.48	.38
Whiplash (A) versus Back Pain (B) n = 16	PCG	4.66 ± 0.42	4.91 ± 0.47	−0.25 ± 0.54	−1.60	.38
	ACC	4.70 ± 0.75	4.63 ± 0.50	0.07 ± 1.01	−0.21	.38
	Thal	6.31 ± 0.78	6.56 ± 1.93	−0.24 ± 1.68	−0.21	.38
Back Pain (A) versus Migraine (B) n = 16	PCG	4.86 ± 0.67	4.89 ± 0.48	−0.03 ± 0.41	0.01	1.00
	ACC	4.5 ± 0.40	4.68 ± 0.44	−0.17 ± 0.62	−0.88	.38
	Thal	5.69 ± 1.01	6.56 ± 1.92	−0.87 ± 1.87	−1.76	.08