Table 3. Initiation of Screening - Comparison of the Guidelines (ACS/USPSTF/ACG/ASGE) .

When to begin screening?	ACS	USPSTF	ACG	ASGE
For average risk patients	Begin at age 50	Begin at age 50	Begin at age 50	Begin at age 50
For average risk African-American patients	Begin at age 45	Not addressed	Not addressed	Not addressed
For patients with a first degree relative with CRC < age 60	Begin at age 40 or 10 years younger than the index case	Not addressed	Begin at age 40 or 10 years younger than the index case	Begin at age 40 or 10 years younger than the index case
For patients with a first degree relative with CRC > age 60, or two second degree relatives with CRC	Begin at age 40	Not addressed	Begin at age 50 (same as average risk screening)	Begin at age 40

*Our study concept was designed with the ACS/USPSTF/ACG guidelines. The ASGE guidelines are provided for further comparison.