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Table 2: MRI scoring schemes
BASIC Ordinal 0–4: 0 = normal; 1 = GM only; 2 = some WM; 3 = all WM in plane; 4 = with hemorrhage
Sagittal grade Ordinal 1–4: 1 = normal; 2 = less than a VB; 3 = longer than 1 VB; 4 = with hemorrhage
Longitudinal extent of T2 signal abnormality Numeric [mm]
MCC Numeric MCC % = 1 − {D_i/[(D_a + D_b)/2]} × 100%;
    D = canal width^{^a}
MSCC Numeric MSCC % = 1 − {d_i/[(d_a + d_b)/2]} × 100%;
    d = spinal cord width^{^a}
Note:—VB indicates vertebral body.
↵a See Fig 1 for further description.

BASIC	Ordinal	0–4: 0 = normal; 1 = GM only; 2 = some WM; 3 = all WM in plane; 4 = with hemorrhage
Sagittal grade	Ordinal	1–4: 1 = normal; 2 = less than a VB; 3 = longer than 1 VB; 4 = with hemorrhage
Longitudinal extent of T2 signal abnormality	Numeric	[mm]
MCC	Numeric	MCC % = 1 − {D_i/[(D_a + D_b)/2]} × 100%;
MCC		D = canal width^{^a}
MSCC	Numeric	MSCC % = 1 − {d_i/[(d_a + d_b)/2]} × 100%;
MSCC		d = spinal cord width^{^a}