Table 2.

Prevalence of Family History of Colorectal Cancer Age 35 – 55 Years According to Strength of Risk (N = 1,854*)

Strength of History	Definition	Number of patients	Percentage
Strong	1st degree relative with onset at age ≤60 years or 2 or more 1st degree relatives at any age	53	2.9
Intermediate	1st degree relative with onset at age 60 or more years or 2 or more 2nd degree relatives	162	8.7
Other	Other family history of colorectal cancer	140	7.6
None	No family history of colorectal cancer	1,499	80.9
Total		1,854	100.1

*Twelve patients responded to the initial survey but did not provide complete information on family history of colorectal cancer