Table 1. The characteristic of patients with neuroendocrine tumors, Taiwan, 1996-2006.

	Total		without second cancer		with second cancer
	N	%	N	%	N	%	P-valuea
Sex
Male	829	61.41	797	61.26	32	65.31	0.57
Female	521	38.59	504	38.74	17	34.69
Age
0-40	208	15.41	204	15.68	4	8.16	0.06
40-50	233	17.26	226	17.37	7	14.29
50-60	259	19.19	249	19.14	10	20.41
60-70	273	20.22	267	20.52	6	12.24
≥70	377	27.93	355	27.29	22	44.90
Primary site
Rectum	340	25.19	329	25.29	11	22.45	0.12
Lung and bronchus	292	21.63	283	21.79	9	18.37
Stomach	99	7.33	94	7.23	5	10.20
Colon	69	5.11	67	5.15	2	4.08
Pancreas	68	5.04	67	5.15	1	2.04
Small intestine	66	4.89	63	4.81	3	6.12
Appendix	54	4.00	50	3.84	4	8.16
Head and neckb	48	3.56	45	3.46	3	6.12
Liver	22	1.63	22	1.69	0	0.00
Breast	17	1.26	17	1.31	0	0.00
Ovary	14	1.04	14	1.08	0	0.00
Esophagus	11	0.81	11	0.85	0	0.00
Prostate	7	0.52	5	0.38	2	4.08
Biliary	7	0.52	7	0.54	0	0.00
Othersb	236	17.48	227	17.45	9	18.37

Abbreviation: N = number

^a P-values were calculated using chi-squared test or Fisher’s exact test

^b Head and neck includes lip and oral cavity, pharynx, larynx, nasal cavity and paranasal sinuses, middle ear, and major salivary glands; Biliary includes gallbladder and extrahepatic bile duct; Others includes anus, bone, brain, cervix, intracranial gland, kidney, labia majora, mediastinum of the heart, peritoneum, pleura, retroperitoneum, skin, testis, thymus, thyroid, urinary bladder, uterus, vagina, and site undefined