Table 1.

Vital status, demographic factors and medications among NIH-AARP cohort members with and without CRC screening history

Variables of interest	Colorectal cancer screening in past 3 years
	No screening (N=45,751)	Colonoscopy (N=22,780)	Any screening (N=109,689)
	N (column %)	N (column %)	N (column %)
CRC Death
No	45,517 (99.5)	22,726 (99.8)	109,321 (99.7)
Yes	234 (0.5)	54 (0.2)	368 (0.3)
Age
<55	6,917 (15.1)	1,933 (8.5)	11,715 (10.7)
55–59	10,879 (23.8)	4,281 (18.8)	22,775 (20.8)
60–64	12,886 (28.2)	6,533 (28.7)	31,968 (29.1)
65–69	13,603 (29.7)	8,976 (39.4)	38,946 (35.5)
70+	1,466 (3.2)	1,057 (4.6)	4,285 (3.9)
Education*
<8 years	2,159 (4.7)	820 (3.6)	3,631 (3.3)
8–11 years	9,286 (20.3)	3,477 (15.3)	16,184 (14.8)
High school	5,175 (11.3)	2,090 (9.2)	10,331 (9.4)
Some college	11,056 (24.2)	5,150 (22.6)	24,514 (22.3)
College and post graduate	17,081 (37.3)	10,788 (47.4)	53,027 (48.3)
Race*
White	43,174 (94.4)	21,545 (94.6)	103,915 (94.7)
Black	922 (2.0)	503 (2.2)	2,247 (2.0)
Hispanic	700 (1.5)	302 (1.3)	1,451 (1.3)
Asian	459 (1.0)	195 (0.9)	1,037 (0.9)
Pacific Islander	42 (0.1)	12 (0.1)	69 (0.1)
American Indian/Alaskan	95 (0.2)	43 (0.2)	192 (0.2)
Diabetes
No	42,968 (93.9)	21,088 (92.6)	101,700 (92.7)
Yes	2,783 (6.1)	1,692 (7.4)	7,989 (7.3)
Sex and HRT use
Male	24,430 (53.4)	15,834 (69.5)	72,507 (66.1)
Female never used HRT	11,009 (24.1)	2,496 (11.0)	13,507 (12.3)
Female used HRT	10,312 (22.5)	4,450 (19.5)	23,675 (21.6)
Aspirin or NSAID use
Never	6,470 (14.1)	3,072 (13.5)	12,910 (11.8)
Monthly	16,370 (35.8)	6,747 (29.6)	34,276 (31.2)
Weekly	10,559 (23.1)	4,939 (21.7)	25,252 (23.0)
Daily	12,352 (27.0)	8,022 (35.2)	37,251 (34.0)

^*Numbers do not add up to total due to missing values