Table 7.

Binary logistic regression analysis of perioperative major complication risk factors

		Univariate regression analysis		Multivariate regression analysis
		OR (95%CI)	P values	OR (95%CI)	P values
Age	> 35y	2.229(1.008–4.927)	0.048*	2.530(0.990–6.470)	0.053
	≤ 35y (ref.)
Gender	Male	0.811(0.372–1.767)	0.598
	Female (ref.)
Preoperative spinal cord compression	Yes	0.885(0.407–1.926)	0.758
	No (ref.)
Preoperative embolization	Yes	2.346(1.057–5.204)	0.036*	2.088(0.834–5.229)	0.116
	No (ref.)
Number of resected levels	Multi-level	6.505(2.743–15.426)	< 0.001*	5.938(2.281–155.459)	< 0.001*
	Single level (ref.)
Recurrent tumor	Yes	2.671(0.904–7.896)	0.076
	No (ref.)
Approach	Combined	3.214(1.428–7.233)	0.005*	2.058(0.809–5.235)	0.13
	Single (ref.)

OR Odds ratio, CI Confidential interval

^*Significant at P < 0.05