Table 2.

Univariate and multivariate analyses of factors associated with the incidence and severity of postoperative complications

	Univariable			Multivariable
	OR	95% CI	P value	OR	95% CI	P value
Overall complication (vs no complication)
Age	1.01	.98–1.03	.62	-	-	-
Surgical margin status
R0	Ref
R1/R2	1.66	.83–3.32	.15	-	-	-
Operation approach
Open abdominal or posterior	Ref			Ref
Minimally invasive surgery	.37	.14–.97	.04	.35	.13–.92	.03
Thoraco-abdominal surgery	2.18	.92–5.18	.08	2.23	.92–5.40	.08
Other organ resected
No	Ref
Yes	1.34	.72–2.51	.36	-	-	-
Hormone secreting tumor
Nonfunctional	Ref			Ref
Other functional	1.27	.56–2.92	.57	1.06	.45–2.50	.89
Cortisol secreting	2.23	1.06–4.67	.03	2.25	1.04–4.88	.04
Major complication (vs no complication)
Age	.99	.96–1.01	.33	-	-	-
Surgical margin status
R0	Ref			Ref
R1/R2	2.4	.85–6.75	0.1	1.40	.49–3.98	.52
Operation approach
Open abdominal or posterior	Ref
Minimally invasive surgery	.18	.02–1.48	.11	-	-	-
Thoraco-abdominal surgery	2.18	.66–7.24	0.2	-	-	-
Other organ resected
No	Ref			Ref
Yes	2.68	.91–7.94	.07	4.83	1.22–19.2	.03
Hormone secreting tumor
Nonfunctional	Ref			Ref
Other functional	.32	.04–2.64	.29	NA	NA	NA
Cortisol secreting	2.86	1.04–7.90	.04	3.09	1.10–8.71	.03

CI = confidence interval; OR = odds ratio.