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Table 2: Statistical comparisons (using a t test) of MR imaging—based measurements among patients with RRMS, SPMS, and PPMS*
PPMS vs SPMS RRMS vs SPMS PPMS vs RRMS
BPF 0.030 1.7e-5^† 0.020
MOV 0.13 1.9e-6^† 1.2e-5^†
Total CC area 0.0026^† 0.0013^† 0.99
CC-segment 1 0.052 0.013^† 0.39
CC-segment 2 0.024 0.018 0.83
CC-segment 3 0.00014^† 2.7e-3^† 0.61
CC-segment 4 0.0032^† 0.011^† 0.49
CC-segment 5 0.0041^† 0.0042^† 0.53
* To account for multiple comparisons, the α level for significance was 0.0167.
† Significant P values.

	PPMS vs SPMS	RRMS vs SPMS	PPMS vs RRMS
BPF	0.030	1.7e-5^†	0.020
MOV	0.13	1.9e-6^†	1.2e-5^†
Total CC area	0.0026^†	0.0013^†	0.99
CC-segment 1	0.052	0.013^†	0.39
CC-segment 2	0.024	0.018	0.83
CC-segment 3	0.00014^†	2.7e-3^†	0.61
CC-segment 4	0.0032^†	0.011^†	0.49
CC-segment 5	0.0041^†	0.0042^†	0.53