Table 2.

Clinical and imaging features associated with the modified Mccormick scale.

Variable	Preoperative “good MMS” (n = 123)	p-value	Postoperative “good MMS” (n = 122)	p-value
Age
≥66 years	39/66 (59.1%)	0.03	40/65 (61.5%)	<0.001
<66 years	44/57 (77.2%)		51/57 (89.5%)
Baseline symptom duration
<4 weeks	26/32 (81.3%)	0.053	29/31 (93.5%)	0.005
≥4 weeks	57/91 (62.6%)		62/91(68.1%)
Myelomalacia
Present	32/65 (49.2%)	<0.001	36/64 (56.3%)	<0.001
Absent	51/58 (87.9%)		55/58 (94.8%)
Dural tail sign
Present	9/18 (50.0%)	0.09	9/18 (50.0%)	0.02
Absent	74/105 (70.5%)		82/104 (78.8%)
Involved spinal segments
≤2	76/110 (69.1%)	0.06	83/109 (76.1%)	0.11
>2	5/13 (38.5%)		7/13 (53.8%)
Dural attachment (one patient was excluded because of selective arachnoid attachment)
Ventral	27/37 (73.0%)	0.53	26/37 (70.3%)	0.49
Dorsal and lateral	56/85 (65.9%)		65/84 (77.4%)
Simpson grade
I + II	82/118 (69.5%)	0.33	89/117 (76.1%)	0.10
III + IV	2/5 (40.0%)		2/5 (40.0%)
WHO grade
I	77/114 (67.5%)	0.99	84/113 (74.3%)	0.99
II	6/9 (66.7%)		7/9 (77.8%)
MIB-1 labeling index (available in 122 patients)
<5%	54/72 (75.0%)	0.90	52/72 (72.2%)	0.40
≥5%	32/50 (64.0%)		37/50 (74.0%)