. Author manuscript; available in PMC: 2015 Jun 12.

Published in final edited form as: Mult Scler. 2013 Dec 12;20(8):1066–1073. doi: 10.1177/1352458513515084

Table 2. Comparisons of MRI parameters by tissue type between groups.

	Control (n=7)	cv	RRMS (n=9)	p-value	difference

T1ρ cortical GM (s)	0.221 ± 0.029	13%	0.225 ± 0.009	p = 0.695	1%
T1ρ NAWM (s)	0.172 ± 0.003	2%	0.182 ± 0.011	p = 0.026	6%
T1ρ T2L (s)	n.a.	n.a.	0.312 ± 0.029	n.a.	n.a.
T2ρ cortical GM (s)	0.092 ± 0.009	10%	0.097 ± 0.012^a	p = 0.396	5%
T2ρ NAWM (s)	0.084 ± 0.003	4%	0.087 ± 0.007^a	p = 0.328	4%
T2ρ T2L (s)	n.a.	n.a.	0.140 ± 0.035^a	n.a.	n.a.
T1sat cortical GM (s)	1.101 ± 0.055	5%	1.165 ± 0.086	p = 0.11	6%
T1sat NAWM (s)	0.630 ± 0.030	5%	0.738 ± 0.059	p = 0.0006	17%
T1sat T2L (s)	n.a.	n.a.	1.216 ± 0.358	n.a.	n.a.
MTR cortical GM (%)	17.69 ± 2.02	11%	17.21 ± 2.27	p = 0.671	-3%
MTR NAWM (%)	29.34 ± 2.74	9%	25.95 ± 3.23	p = 0.043	-12%
MTR T2L (%)	n.a.	n.a.	16.48 ± 7.06	n.a.	n.a.

Values of MRI parameters are shown as mean±sd for different tissue type and subject populations. Inter-subject coefficient of variation (cv=sd/mean) were calculated in healthy control subjects. P-values refer to un-paired 2-sided t-test between MS subjects and healthy control subjects. Differences of MRI parameters between groups (MS minus controls) are also shown. Parameters that show statistically significant differences between groups are displayed in bold.

: n=7 rather than 9.