Table 1.

Catalogue of cases with changes in neurological status on variables

Group N = 76	No. of patients	No. of patients with changes in neurological status ( + )	No. of patients without changes in neurological status (−)	χ 2	P values
X 1: Gender	Male (N = 37)	3	34	0.000	1.000
	Female (N = 39)	3	36
X 2: Age	<18 (N = 52)	3	49	0.000	1.000
	>18 (N = 24)	3	21
X 3: Apex	Thoracic spine (N = 45)	1	44	5.959	0.027*
	Thoracolumbar spine (N = 19)	4	15
	Lumbar spine (N = 12)	1	11
X 4: Cobb angle of the main curve at the coronal plane	<100° (N = 51)	1	50	5.232	0.022
	>100° (N = 25)	5	20
X 5: Scoliosis with thoracic hyperkyphosis	Yes (N = 13)	4	9	7.809	0.005
	No (N = 63)	2	61
X 6: Level of vertebral column resected	One vertebra (N = 59)	2	57	4.852	0.028
	≥2 vertebrae (N = 17)	4	13
X 7: Number of sectional vessels ligated(pairs)	1 (N = 59)	2	57	4.852	0.028
	≥2 (N = 17)	4	13
X 8: Preoperative neurologic dysfunction	Yes (N = 13)	5	8	15.399	0.000
	No (N = 63)	1	62
X 9: Associated with intraspinal and brain stem anomalies	Yes (N = 26)	5	21	4.816	0.028
	No (N = 50)	1	49
X 10: Etiology	Idiopathic (N = 31)	3	28	0.002	0.964
	Non-idiopathic (N = 45)	3	42

With regard to P values, the value marked with * meant the results using Fisher’s exact probability, and the value without * was P values calculated using continuity correction Chi-square