Table 1.

 Summary table of test attributes provided during discussion groups

	CC	CTC
Practicalities
Bowel preparation	Full bowel cleansing	Full bowel cleansing or iodine‐based contrast liquid
Sedation	Yes	No
Length of procedure	1–2 h	20–30 min
Outcomes and results
Image type	Real‐time unprocessed imagery	Reconstructed 2D–3D imagery
Able to take biopsies	Yes	No
Detects problems outside the colon	No	Yes
Test sensitivity
Small polyps	75 out of 100	60 out of 100
Large polyps	95 out of 100	90 out of 100
Risks and side‐effects
Discomfort	Mild	Mild
Heavy bleeding	1 in 330	No
Perforation	1 in 800	1 in 3300
Radiation‐induced cancer fatality	None	1 in 4000 (for a 50‐year‐old person)