Clinical, pathological and prognostic characteristics of gastroenteropancreatic neuroendocrine neoplasms in China: a retrospective study

Table 5 Overall survival

	Number	Mean survival times (years)	95% CI	χ ²	P- value
All	168	8.94 ± 0.28	8.40-9.48
Age				4.33	0.04*
≤ 50	76	9.50 ± 0.29	8.92-10.07
> 50	92	7.46 ± 0.38	6.73-8.20
Gender				4.25	0.04*
Male	102	9.31 ± 0.27	8.78-9.84
Female	66	7.71 ± 0.61	6.52-8.91
Site				4.40	0.11
Rectum	99	9.40 ± 0.27	8.88-9.92
Pancreas	23	4.09 ± 0.48	3.14-5.03
Others^a	46	7.59 ± 0.57	6.47-8.72
Size				18.485	<0.01*
< 1 cm	44	9.84 ± 0.16	9.53-10.15		<0.01^c
1-2 cm	50	8.88 ± 0.28	8.34-9.42		0.01^c
> 2 cm	51	5.06 ± 0.51	4.07-6.06
Unclear^b	23	8.50 ± 0.39	7.74-9.26		0.01^c
Tumor type				58.840	<0.01*
NET	41	7.35 ± 0.63	6.13-8.58		<0.01^c
NEC	12	2.80 ± 0.87	1.09-4.50
Unclear	115	9.80 ± 0.14	9.53-10.08

^aothers represent stomach, duodenum, jejunum, ileum, colon, appendix.
^bspecimens too small to be properly described tumor size.
^clog-rank test (pairwise over strata) according to size and tumor type; the P-values of tumor size 1 cm vs. > 2 cm, 1–2 cm vs. > 2 cm, Unclear vs. > 2 cm and NET vs. NEC were < 0.05.
*P <0.05.
NET, neuroendocrine tumor; NEC, neuroendocrine carcinoma.

ISSN: 1472-6823