Minimally invasive vs open pancreatectomy for nonfunctioning pancreatic neuroendocrine tumors

Table 4 Factors associated with tumor recurrence after curative resection of nonfunctioning pancreatic neuroendocrine tumors

Variable	Univariate analysis			Multivariate analysis
	HR	95%CI	P value	HR	95%CI	P value
Age > 60 yr	0.40	0.09-1.83	0.239
Male	1.95	0.62-6.16	0.254
Minimally invasive surgery	0.61	0.18-2.09	0.432	1.062	0.28-4.03	0.929
Tumor size > 2.5 cm	22.21	2.86-172.69	0.003	16.21	1.99-128.8	0.009
Positive resection margin	1.52	0.33–6.99	0.589
Poor differentiation, G3	71.55	6.43-795.75	0.001	24.429	1.99-277.95	0.017
Positive lymph node	1.93	0.42–8.83	0.398
Lympho-vascular invasion	8.77	2.75-27.93	< 0.001	3.56	0.96-13.2	0.058

HR: Hazard ratio.