Clinical features and prognostic factors of duodenal neuroendocrine tumours: A comparative study of ampullary and nonampullary regions

Table 5 Clinical characteristics comparison of nonampullary duodenal neuroendocrine tumour patients

Clinical features	Tumour size (diameter)		Statistical value	P value
	< 2 cm (n = 8)	≥ 2 cm (n = 14)
Males/females (n/n)	1/7	8/6	Fisher exact test	0.052
Age at diagnosis (yr)	56.50 ± 12.00	53.43 ± 8.97	t = 0.684	0.502
Survival time (month)	191.25 ± 175.47	42.93 ± 30.49	t = 7.243	0.048
Histological classification and grading, n (%)			Fisher exact probability method = 5.090	0.120
NET-G1	5	7
NET-G2	2	7
NET-G3	0	0
NEC	1	0
Tumour staging, n (%)			Fisher exact probability method = 2.459	0.363
I	2	0
II	6	9
III	0	2
IV	0	3
With/without surgery (n/n)	8/8	12/2	Fisher exact test	0.515
With/without chemotherapy (n/n)	1/7	4/10	Fisher exact test	0.394
Death/survival (n/n)	0/8	8/14	Fisher exact test	0.051