Table 1.

Demographic, surgical, and tumor characteristics.

Patients’ characteristic		P value
Number of patients	148
Age (years)	46.7 ± 15.3
Sex (female)	72 (48.6%)
Duration of symptoms (months)	29.4 ± 57.3
Tumor characteristic		P value
Tumor location
Intramedullary	88 (59.5%)
Extramedullary	60 (40.5%)
Tumor location
Cervical	38 (25.7%)
Thoracic	42 (28.4%)
Lumbar	68 (45.9%)
WHO grade I	70 (47.3%)
WHO grade II	74 (50.0%)
WHO grade III	4 (2.7%)
Cervical: WHO grade (I/II/III)	(7/30/1)/38	p = 0.0001
Thoracic: WHO grade (I/II/III)	(17/24/1)/42
Lumbar: WHO grade (I/II/III)	(46/20/2)/68
Tumor recurrence		P value
Total tumor recurrence	12 (8.1%)	p = 0.024
Cervical spine	0/38 (0%)
Thoracic spine	7/42 (16.7%)
Lumbar spine	5/68 (7.4%)
Tumor recurrence after GTR	5/129 (6.0%)	p = 0.0001
Tumor recurrence after STR	7/19 (36.8%)
Surgical characteristics		P value
Surgical approach
Laminoplasty	76 (51.4%)
Laminectomy	70 (47.3%)
Hemilaminectomy	2 (1.4%)
GTR	129/148 (87.2%)
Cervical Spine	33/38 (86.8%)	p = 0.100
Thoracic Spine	33/42 (78.6%)
Lumbar Spine	63/68 (92.6%)

GTR, gross-total resection; STR, subtotal tumor resection; WHO, World Health Organization.