Table 2.

Different matching criteria indicated by eight readers in the questionnaire

Morphology	Size	Location
CTC polyp needs to have a similar appearance/shape as the colonoscopy polyp (8)	Size of the CTC polyp has to be within 50% of the colonoscopy polyp size (4)	Polyps are in the same or adjacent segment (6)
And description of morphology by the gastroenterologist resembles that of the CTC observer (6)	Size of the CTC polyp can be maximally 50% smaller or 100% larger than the colonoscopy polyp (1)	Polyps are in the same segment (1)
	Size of the colonoscopy polyp has to be within 50% (1) or 40% (1) of the CTC polyp size	Polyps are within a reasonable distance (judged by the CTC radiologist who is performing the matching) (1)
	Size of the CTC polyp has to be within 50% of the colonoscopy polyp size or size of the colonoscopy polyp has to be within 50% of the CTC polyp size (1)

The numbers within parentheses indicate how many readers use the specific matching criterion