Table 3.

Logistic regression analysis of postoperative complications

Characteristics	Odds Ratio (95% CI)	P value
Univariate analysis simple logistic regression
Length of surgery	1.023 (1.005–1.043)	0.013
Pre-operative KPS (KPS score ≥70 vs. KPS score <70)	0.085 (0.010–0.767)	0.028
Length of hospital stay	1.249 (1.025–1.522)	0.028
Tumor volume	0.974 (0.934–1.016)	0.226
Pre-operative language deficit	2.4 (0.471–12.22)	0.292
Gender	0.36 (0.075–1.727)	0.202
Image guidance technique (ioUS vs. ioMRI + ioUS)	0.333 (0.037–3.014)	0.328
Pre-operative motor deficit	1.246 (0.258–6.031)	0.784
Age	0.961 (0.810–1.139)	0.644
Pre-operative altered mental status	0.556 (0.099–3.113)	0.504
Involvement of eloquent structures	1.246 (0.257–6.031)	0.784
Stepwise-Forward Multiple Logistic Regression
Length of surgery	1.033 (1.006–1.06 )	0.015
Length of hospital stay	1.422 (1.046 –1.932)	0.025

Bold values indicate statistical significance at the p < 0.05 level

KPS Karnofski Performance Scale; ioUS, intraoperative ultrasonography, ioMRI intraoperative magnetic resonance imaging. NANO, The Neurologic Assessment in Neuro-Oncology