Table 1. Number of NHIS respondents in final dataset when certain factors are chosen.

Ever screened? †	Family history†	Age (years)	Hyper- -tension	Training	Training & CRC	Testing	Testing& CRC
Unused◊	Unused◊	18–85◊	Used◊	525,394◊	1,269◊	58,376◊	140◊
Unused	Used	18–85	Used	105,950	245	11,772	27
Unused	Used	18–85	Unused	105,760	245	11,723	27
Unused	Unused	18–85	Unused	525,394	1,269	58,376	140
Unused	Unused	18–49	Used	298,085	162	33,120	18
Unused	Unused	50–75	Used	227,310	1,107	25,255	122
Used	Unused	18–85	Used	10,261	72	217,774	446
Used	Used	18–85	Used	66,938	300	161,098	218
Used	Used	18–85	Unused	9,002	59	219,176	459
Used	Unused	18–85	Unused	13,755	71	212,995	443

† Data appearing in NHIS years 2000, 2005, 2010, and 2015 only when a set of supplementary questions were asked.

◊ Data in the default model.