Table 1.

Characteristics.

			Non–screen detecteda					Screen detecteda
	Overall		Rectum		Colon		p value	Rectum		Colon		p value
Number of patients	1055		693		220			54		11
Median age (IQR)	61 (50–68)		58 (48–67)		64 (54–74)		<0.001	65.5 (63–69)		67 (61–74)		0.92
	n	%	n	%	n	%		n	%	n	%
Sex
Male	501	47.5%	327	47.2%	98	44.5%	0.54	35	64.8%	7	63.6%	1
Female	554	52.5%	366	52.8%	122	55.5%		19	35.2%	4	36.4%
Grade
I	775	73.5%	516	74.5%	147	66.8%	<0.001	48	88.9%	9	81.8%	0.66
II	103	9.8%	50	7.2%	39	17.7%		5	9.3%	2	18.2%
III	11	1.0%	3	0.4%	7	3.2%		–	–	–	–
I/IIb	160	15.2%	124	17.9%	24	10.9%		–	–	–	–
I/II/IIIc	6	0.6%	0	–	3	1.4%		1	1.9%	–	–
Histological diagnosis
Endoscopy	930	88.2%	676	97.5%	144	65.5%	<0.001	54	100.0%	11	100.0%	1
Surgery	114	10.8%	15	2.2%	69	31.4%		–	–	–	–
Autopsy	7	0.7%	2	0.3%	5	2.3%		–	–	–	–
Radiological biopsy	2	0.2%	–	–	1	0.5%		–	–	–	–
Unknown	2	0.2%	–	–	1	0.5%		–	–	–	–
Therapy
Endoscopic local excision	813	77.1%	634	91.5%	78	35.5%	<0.001	52	96.3%	7	63.6%	0.006
TEM	22	2.1%	21	3.0%	–	–		–	–	–	–
Radical resection	212	20.1%	36	5.2%	137	62.3%		2	3.7%	4	36.4%
Unknown/NA	8	0.8%	2	0.3%	5	2.3%		–	–	–	–

IQR: interquartile range; NA: not available; NET: neuroendocrine tumour; TEM: transanal endoscopic microsurgery.

^aExcludes 77 patients with a colorectal NET for which the specific primary tumour location was not available.

^bCarcinoid/Suggestive for Grade I or II.

^cNET with no data on histological grade.