Table 3. Polyp Characteristics, Overall and by Colon Site.

	Overall (n = 233,414)		Right colon (n = 114,354)		Left colon (n =119,060)
	n	%	n	%	n	%
Polyp size, any histology, mean (SD), mm	4.3 (2.9)		4.3 (2.6)		4.3 (3.1)
Size distribution, any histology (mm)
<6	180,479	77.32	87,428	76.45	93,051	78.15
6–9	42,277	18.11	22,572	19.74	19,705	16.55
>9	10,658	4.57	4354	3.81	6304	5.29
Polyp histology
Normal	14,627	6.30	8056	7.04	6571	5.52
Hyperplastic	81,848	35.10	22,438	19.62	59,410	49.90
Tubular adenoma	105,719	45.30	66,632	58.27	39,087	32.83
Tubulovillous/villous adenoma	6021	2.60	2776	2.43	3245	2.72
Sessile serrated adenoma	8961	3.80	8126	7.11	835	0.70
Traditional serrated adenoma	826	0.40	172	0.15	654	0.55
Mixed hyperplastic-adenomatous polyp	110	0.00	33	0.03	77	0.06
HGD/AdenoCa	1689	0.70	585	0.51	1104	0.93
Other	11,202	4.80	4623	4.04	6579	5.53
Unclassified	2411	1.00	913	0.80	1498	1.26
Total	233,414	100.00	114,354	100.00	119,060	100.00

SD, standard deviation.