Table 1.

Yield of colonoscopy in studies with subgroups of symptomatic and/or screening/surveillance “elderly” patients

Ref.	n	Age (yr)	Completion	Cancers	Adenomas/polyps
Bat et al[10], 1992	436	80+	63%	14%	29.80%
Ure et al[48], 1995	354	70+	78%	6%	24%
Sardinha et al[49], 1999	403	80+	94%	4.50%	-
Clarke et al[12], 2001	95	85+	-	12.70%	-
Lagares-Garcia et al[50], 2001	103	80+	92.70%	11.60%	19.40%
Arora et al[51], 2004	110	80+	97%1	20%	-
Syn et al[9], 2005	225	80+	56%	11%	25%
Yoong et al[52], 2005	316	85+	69%	8.90%	14.20%
Karajeh et al[15], 2006	1000	65+	81.80%	7.10%	6%2

¹Adjusted for non-traversable stricture;

²Large polyps ≥ 1 cm in size.