Table 5.

Analysis of factors related to survival of pNET patients.

Factor		Number	Survival rate (%)	P
Gender	Male	10	83.8	0.976
	Female	18	91.8
Age	<50	12	100	0.139
	>50	16	81.3
Is it functional	Yes	8	100	0.268
	No	20	85.0
Is there distant metastasis before operation	Yes	4	25	0.000
	No	24	100
Chemotherapy or not	Yes	2	100	0.611
	No	26	88.5
Tumor diameter (CM)	≦1.5	4	100	0.338
	1.5∼5	16	93.8
	>5	8	75.0
TNM staging	IA	11	100	0.002
	IB	8	100
	IIA	1	100
	IIB	3	100
	III	2	50
	IV	3	33.3
WHO staging	G1	18	100	0.002
	G2	7	85.7
	G3	3	33.3
Lymph node metastasis	Yes	5	89.3	0.022
	No	23	95.7
Operation mode	RO	25	95.5	0.018
	Appease	3	33.3