Pancreatic primitive neuroectodermal tumors: Clinical features, treatment, and influencing factors

Table 2 Analyses of overall survival

Variable	3-year survival, n	Univariate P value	Cox P value	RR	95%CI
Sex		0.573
Men	2
Women	3
Age in years		0.723
< 24	3
≥ 24	3
Size		0.795
< 8	4
≥ 8	3
Surgical resection		0.100
Yes	4
No	3
Chemotherapy		0.036
Yes	4
No	1
Local metastasis		0.041
Yes	1
No	2
Lymph node metastasis		0.003	0.012	3.74	2.536-17.198
Yes	0
No	3
Distant metastasis		0.049
Yes	0
No	1
Microscopic margin		0.048
Positive	0
Negative	1
Recurrence		0.088
Yes	2
No	3

CI: Confidence interval; RR: Relative risk.