Table 1.

Size and morphology of polyps

	Group A (SD)	Group B (HD)
No. of polyps	114	123
Mean size (mm)	5.0	4.3
Range (mm)	1–10	1–10
No. <5 mm	69	96
Morphology
Pedunculated	5	10
Sessile	59	73
Flat	50	40
Location
Caecum	9	8
Ascending	13	13
Transverse	29	19
Descending	4	13
Sigmoid/rectum	59	70
Histology
Hyperplastic	37	45
Tubular adenoma	54	67
Villous adenoma	0	1
Tubulovillous adenoma	22	9
Adenocarcinoma	1	1