Clinicopathological features and prognostic factors associated with gastroenteropancreatic mixed neuroendocrine non-neuroendocrine neoplasms in Chinese patients

Table 2 Univariate analysis of overall survival

Variable	n	Log-rank	P value
Gender		0.537	0.464
Male	31
Female	11
Age (yr)		4.815	0.028
< 65	17
≥ 65	25
Location		5.747	0.056
Stomach; Intestine	32; 8
Pancreas	2
Size (cm)		5.106	0.024
< 5 cm	22
≥ 5 cm	20
Ki-67 index		9.349	0.002
< 50%	17
≥ 50%	25
Proportion of the two components		9.421	0.002
NEC higher	26
AC higher	16
Histological grade of adenocarcinoma		11.303	0.001
Moderately differentiated	13
Poorly differentiated	29
Lymph node metastasis		8.800	0.003
Presence	32
Absence	10
Vascular tumor thrombus		12.250	< 0.001
Presence	25
Absence	17
Neurological recidivism		11.056	0.001
Presence	26
Absence	16
Distant metastasis		44.917	< 0.001
Presence	10
Absence	32
Clinical TNM stage		48.942	< 0.001
I + II	13
III	19
IV	10

NEC: Neuroendocrine carcinomas; TNM: Tumor node metastasis.