Table 3.

Difference in 5-year survival rate in 132 patients with neuroendocrine tumors by age, gender, tumor size, lymph node metastasis, distant metastasis, radical excision, pathological grade, and synaptophysin and chromogranin A expression

		n	5-yr survival rate	χ2	P value
Age (yr)	< 55	73	83.6	0.554	0.457
	≥ 55	59	88.1
Gender	Male	83	80.7	4.327	0.038
	Female	49	93.9
Tumor size	< 2 cm	105	98.1	64.98	0.000
	≥ 2cm	27	37
Lymph node metastasis	No	111	91.9	22.37	0.000
	Yes	21	52.4
Distant metastasis	No	127	86.6	2.765	0.096
	Yes	5	60
Radical excision	No	16	43.8	25.89	0.000
	Yes	116	91.4
Pathological grade	G1 + G2	104	99	71.79	0.000
	NEC	28	35.7
Syn	Negative	14	78.6	0.629	0.428
	Positive	118	86.4
CgA	Negative	80	83.8	0.568	0.451
	Positive	52	88.5

Syn: Synaptophysin; CgA: Chromogranin A; NEC: Neuroendocrine carcinoma.