Table 2.

Uni- and multivariate logistic regression analysis estimating the relationship between repeated microsurgical resection of an intracranial tumor and morbidity at M3

	Univariable analysis			Multivariable analysis
	OR	95% CI	p-value	aOR	95% CI	p-value
Repeated surgery	0.98	0.72–1.34	0.889	1.25	0.90–1.73	0.186
Age (per year)	1.03	1.02–1.04	< 0.001	1.03	1.02–1.04	< 0.001
Male sex	1.54	1.20–1.97	0.001	1.47	1.13–1.90	0.004
Tumor size (per increase in category)	1.83	1.46–2.28	< 0.001	1.78	1.41–2.25	< 0.001
Histology	0.98	0.95–1.02	0.349	1.01	0.97–1.06	0.492
Posterior fossa location	1.05	0.78–1.42	0.757	1.39	1.00–2.25	0.047

The multivariable analysis is adjusted for baseline differences in age, sex, histological diagnosis, size and posterior fossa location of the tumor