Table 2:

Percentage of gray matter fraction change during follow-up between the 3 groups

	NC	aMS	cMS
Δ-GMf 1	0.22% 0.06%	0.53% 0.20%	0.51% 0.19%
Δ-GMf 2 (P vs Δ-GMf 1)	0.23% 0.10% (P = 0.426)	0.52% 0.27% (P = 0.749)	0.51% 0.20% (P = 0.306)
Δ-GMf 3 (P vs Δ-GMf 2)	0.28% 0.19% (P = 0.199)	0.60% 0.35% (P = 0.133)	0.60% 0.40% (P = 0.168)

Note:—Data are reported as mean ± standard deviation (P value). Δ-GMf_1 (%) = percentage of GM fraction change between T0 and T1; Δ-GMf_2 (%) = percentage of GM fraction change between T1 and T2; Δ-GMf_3 (%) = percentage of GM fraction change between T2 and T3.