Table 2. Colorectal Cancer (CRC) Screening Status by Age Group and CRC Family History^a, National Health Interview Survey 2005 and 2010 (n = 26,064).

Family History/Age Group	No.b	2005			2010
		Colonoscopy	FS/FOBT/CT–C	No Screening	Colonoscopy	FS/FOBT/CT–C	No Screening
Have a family history (n = 2,470)
40–49 y	251/196	12.7	1.6	85.7	38.3	3.1	58.7
50–64 y	524/470	21.4	1.3	77.3	69.1	1.7	29.1
≥65 y	571/458	32.0	2.5	65.5	70.3	2.2	27.5
No family history (n = 10,454)
50–64 y	2,964/2,805	14.5	3.1	82.4	52.6	4.4	43.0
≥65 y	2,385/2,300	23.4	3.2	73.4	61.2	4.7	34.1
No response (n = 13,140)
50–64 y	3,914/3,412	9.2	1.4	89.3	34.4	3.8	61.8
≥65 y	3,122/2,692	15.3	1.8	82.8	40.9	3.1	56.0

Abbreviations: CT–C, computed tomography colonography; FOBT, fecal occult blood test; FS, flexible sigmoidoscopy.

^a Family history defined as self-reporting as a first-degree relative (biological parent, sibling, or child) of a CRC patient.

^b Total respondents in the category in 2005 and 2010, respectively.