Safety and efficacy of posterior approach for resection of spinal meningioma: Impact of dural attachment location

Table 3 Comparison of dorsal/dorsolateral, ventral/ventrolateral and lateral dural attachment subgroups, mean ± SD (range)

Variable	Dorsal/dorsolateral (n = 13)	Ventral/ventrolateral (n = 14)	Lateral (n = 7)	P value
Age (years)	65.23 ± 10.35	58.93 ± 11.37	62.57 ± 10.1	0.314
Sex
Male	6	2	2	0.208
Female	7	12	5
Preoperative MMG
I/II/III	6	4	2	0.996
IV/V	7	10	5
Postoperative MMG
I/II/III	12	9	5	0.495
IV/V	1	5	2
Final follow-up MMG
I/II/III	12	11	4	0.208
IV/V	1	3	3
Preoperative VAS score	3.54 ± 2.67	4.64 ± 1.6	3.71 ± 2.81	0.732
Postoperative VAS score	1.62 ± 1.33	2.57 ± 1.09	1.71 ± 1.25	0.11
Final follow-up VAS score	0.38 ± 0.65	0.5 ± 0.65	0.29 ± 0.49	0.738
Calcification
No	8	11	6	0.538
Yes	5	3	1
Operative time (min)	185.38 ± 53.29	174.29 ± 33.62	165.71 ± 73.68	0.751
Intraoperative blood loss (mL)	569.23 ± 449.79	478.57 ± 254.74	514.29 ± 491.35	0.8
Simpson grade
1	4	1	0	0.189
2	9	13	7
Perioperative complications
CSF leakage	2	1	0
Urinary tract infection	0	1	0	0.602
Pneumonia	0	0	1
Follow-up duration (months)	19.31 ± 12.53 (6-36)	24 ± 11.6 (6-36)	26.14 ± 12.08 (6-36)	0.34
Recurrence
No	13	13	7	1
Yes	0	1	0

MMG: Modified McCormick grade; VAS: Visual analogue scale.