Deformity angular distance ratio independently predicts intraoperative neuromonitoring alerts in spinal deformity correction

Table 3 Multivariate analysis of risk factors for IONM alerts: sagittal deformity parameters

Variables	Group	B	S.E.	Wald	OR (95%CI)	p-value
Age (years)		-0.014	0.013	1.275	0.986 (0.962, 1.011)	0.259
SCSCS	Type-I*
	Type-II	-0.524	0.648	0.654	0.592 (0.166, 2.108)	0.419
	Type-III	-0.481	0.658	0.533	0.618 (0.170, 2.248)	0.465
Location of apex	T9-L2*
	C7-T4	2.194	0.796	7.594	8.970 (1.884, 42.703)	0.006
	T5-8	0.664	0.511	1.689	1.942 (0.714, 5.287)	0.194
Etiological diagnosis	Others *
	Congenital	-0.461	0.640	0.519	0.631 (0.180, 2.210)	0.471
	Post-tuberculosis	-0.879	0.680	1.669	0.415 (0.110, 1.575)	0.196
Preoperative sagittal Cobb angle		0.014	0.014	1.020	1.015 (0.987, 1.043)	0.313
S-DAR		-0.042	0.055	0.591	0.958 (0.860, 1.068)	0.442
S-DADR		0.182	0.066	7.671	1.200 (1.055, 1.365)	0.006
Osteotomy type	PCO*
	3CO	0.994	1.180	0.710	2.702 (0.268, 27.272)	0.399
Preoperative neurological deficits	No*
	Yes	1.410	0.537	6.891	4.096 (1.429, 11.740)	0.009

IONM, intraoperative neuromonitoring; B, regression coefficient; S.E., standard error; OR, odds ratio; CI, confidence interval; SCSCS, spinal cord shape classification system; S-DAR, sagittal deformity angular ratio; S-DADR, sagittal deformity angular distance ratio; PCO, posterior column osteotomy; and 3CO, three-column osteotomy
* Reference category. Bold P-values represent statistical significance

ISSN: 1749-799X