Figure 2

At a glance. Barium enema (BE) (brown solid) and colonoscopy (BE + COL) (brown dotted), Capsule endoscopy (CapEndo) (green solid), Computerised-tomography colonography (CTC) (grey solid), Computerised-tomography colonography followed by colonoscopy (CTC→ COL), Colonoscopy (COL) (red solid), Narrow-band imaging (NBI) (purple dotted), No intervention (black solid). Sigmoidoscopy (SIG) (turquoise solid). Sigmoidoscopy combined with barium enema (SIG + BE) (olive green dashed). Stool tests (blue solid). Stool tests combined with BE (stool tests + BE) (brown solide). Stool tests combined with COL (stool tests + COL) (red dotted), Stool tests combined with SIG (stool tests + SIG) (turquoise dotted), ‘+’ combination of tests,‘→’ sequence of test.