Table 3.

Studies reporting detection rates of adenoma and advanced lesion among average risk individuals aged 40-49 and 50-59 years

Ref.	Country of origin	Year published	Number of subjects in age group
			40-49 yr	50-59 yr
Western origin
de Jong et al[17]	the Netherlands	2005	90	36
Regula et al[8]	Poland	2006	2392	37313
Boursi et al[18]	Israel	2009	262	672
Current study	Israel	-	505	1245
Strul et al[4]	Israel	2006	183	409
Imperiale et al[6]	United States	2002	906	1533
Thoma et al[19]	United States	2010	247	747
Rundle et al[20]	United States	2008	553	352
Studies of Western origin (8)			5138	40774
Asian origin
Hemmasi et al[21]	Iran	2014	333	407
Chiu et al[22]	Taiwan (China)	2005	654	592
Chiu et al[23]	Taiwan (China)	2008	4161	4211
Liu et al[24]	Taiwan (China)	2005	2656	1903
Choe et al[25]	South Korea	2006	1875	1587
Hong et al[26]	South Korea	2010	1049	712
Kim et al[27]	South Korea	2013	4550	4436
Chung et al[28]	South Korea	2009	1930	2716
Park et al[29]	South Korea	2009	1057	1207
Ko et al[30]	South Korea	2012	1200	1038
Studies of Asian origin (9)			19465	18807
All studies (17)			24603	59581