Table 1 -.

Baseline characteristics of African American men in the SCCS study by aspirin use

	No Aspirin		Any Aspirin		Regular strength Aspirin
	(n)	(%)	(n)	(%)	(n)	(%)
Total	16365	74.9a	5486	25.1	2634	12.1
Age median (IQR)	48 (10)		53 (13)		52 (12)
BMI median (IQR)	26.1 (7)		28.5 (7.8)		28.1 (7.8)
Education
Less High	5526	33.8b	1823	33.2	913	34.7
High school	6903	42.2	2028	37.0	991	37.6
College	2751	16.8	992	18.1	471	17.9
More than College	1085	6.6	548	10.0	227	8.6
Household income
< 15k	10138	61.9	2900	52.9	1477	56.1
15K-25K	3453	21.1	1176	21.4	539	20.5
25K-50	1840	11.2	855	15.6	386	14.7
50K-100K	620	3.8	381	6.9	156	5.9
> 100k	153	0.9	113	2.1	38	1.4
Family history of prostate cancer
No	15606	95.4	5123	93.4	2460	93.4
Yes	703	4.3	331	6.0	156	5.9
Tobacco use
Current	10017	61.2	2457	44.8	1343	51.0
Former	2814	17.2	1640	29.9	701	26.6
Never	3475	21.2	1335	24.3	559	21.2
Diabetes
No	14242	87.0	3629	66.2	1906	72.4
Yes	2112	12.9	1853	33.8	725	27.5
BPH
No	15689	95.9	4936	90.0	2432	92.3
Yes	627	3.8	516	9.4	189	7.2
PSA screening
No	9076	55.5	2067	37.7	1180	44.8
Yes	6402	39.1	3109	56.7	1299	49.3
DRE screening
No	7611	46.5	1760	32.1	978	37.1
Yes	8666	53.0	3681	67.1	1636	62.1

Abbreviations: IQR, interquartile range; BMI, body mass index; BPH, benign prostate hyperplasia; PSA, prostate cancer-specific antigen; DRE, digital rectal examination

^apercent of all men in study (n = 21851);

^bpercent of men within aspirin group [no aspirin (n = 16365), any aspirin (n = 5486), regular strength aspirin (n = 2634)] for all listed variables. Missing data not included in percentages