Table 3. Select Sociodemographic and Lifestyle Characteristics of Breast Cancer Patients in the CBCSC, by Race/Ethnicity.

	Non-Latina Whites N=6,501 (53.2%)		African Americans N=2,060 (16.9%)		Latinas N=2,032 (16.6%)		Asian Americans N=1,505 (12.3%)		Other race/ethnicity N=112 (0.9%)		Total N=12,210(100%)
	N	% a	N	% a	N	% a	N	% a	N	% a	N	% a
Mean age (SD)	62.0 (12.1)		60.0 (12.6)		58.6 (11.7)		55.9 (11.8)		60.9 (13.6)		60.4 (12.3)
US Born
Yes	6,080	94.0	2,011	98.0	1,146	56.5	502	33.4	95	87.2	9,834	80.9
No	386	6.0	40	2.0	882	43.5	999	66.6	14	12.8	2,321	19.1
Unknown	35		9		4		4		3		55
Education
<high school	155	2.4	281	13.7	749	37.1	115	7.7	6	5.4	1,306	10.7
high school	685	10.6	511	25.0	481	23.8	196	13.0	6	5.4	1,879	15.4
some college	1,074	16.5	761	37.2	471	23.3	345	23.0	26	23.2	2,677	22.0
college graduate	4,578	70.5	494	24.1	320	15.8	847	56.4	74	66.1	6,313	51.9
Unknown	9		13		11		2		0		35
Parity
Nulliparous	1,395	21.7	314	15.4	254	12.6	347	23.2	24	21.8	2,334	19.3
1 birth	886	13.7	381	18.7	234	11.6	251	16.8	17	15.5	1,769	14.6
2 births	2,164	33.6	446	21.9	456	22.6	463	31.0	35	31.8	3,564	29.5
3 births	1,228	19.1	375	18.4	407	20.2	254	17.0	10	9.1	2,274	18.8
≥4 births	769	11.9	522	25.6	666	33.0	178	11.9	24	21.8	2,159	17.8
Unknown	59		22		15		12		2		110
Age at first birth
<20	549	10.9	761	44.7	481	27.6	66	5.8	14	16.5	1,871	19.3
20-24	1,795	35.6	586	34.5	710	40.8	297	26.1	34	40.0	3,422	35.3
25-29	1,710	33.9	218	12.8	338	19.4	474	41.6	22	25.9	2,762	28.5
30-34	733	14.5	98	5.8	143	8.2	200	17.5	11	12.9	1,185	12.2
≥35	251	5.0	38	2.2	69	4.0	103	9.0	4	4.7	465	4.8
Nulliparous	1,395		314		254		347		24		2,334
Unknown	68		45		37		18		3		171
First-degree family history of breast cancer
No	5,139	80.6	1,723	84.9	1,731	85.6	1,288	86.2	87	81.3	9,968	82.9
Yes	1,233	19.4	307	15.1	292	14.4	207	13.8	20	18.7	2,059	17.1
Unknown	129		30		9		10		5		183
Smoking status
Never	3,150	53.7	721	46.9	903	65.3	1,174	78.8	56	52.8	6,004	57.8
Past ≤ pack/day	1,704	29.1	465	30.3	313	22.6	217	14.6	30	28.3	2,729	26.3
Past >1 pack/day	504	8.6	39	2.5	20	1.4	16	1.1	12	11.3	591	5.7
Current≤1pack/day	379	6.5	283	18.4	139	10.1	77	5.2	7	6.6	885	8.5
Current >1pack/day	127	2.2	29	1.9	8	0.6	5	0.3	1	0.9	170	1.6
Unknown	637		523		649		16		6		1,831
Alcohol consumption
Non-drinker	2,106	34.4	1,214	61.8	1,154	58.7	1,210	81.9	41	41.4	5,725	49.3
≤ 2 drink/week	1,289	21.1	362	18.4	409	20.8	101	6.8	23	23.2	2,184	18.8
>2 drinks/week	2,719	44.5	387	19.7	402	20.5	166	11.2	35	35.4	3,709	31.9
Unknown	387		97		67		28		13		592
Menopause status
Premenopausal	1,546	25.6	552	28.6	562	29.3	576	39.6	33	30.6	3,269	28.6
Natural menopause	3,566	59.1	888	46.0	1,006	52.5	664	45.7	57	52.8	6,181	54.0
Bilateral Oophorectomy	552	9.2	272	14.1	179	9.3	108	7.4	9	8.3	1,120	9.8
Surgical/Medical menopause	367	6.1	219	11.3	169	8.8	105	7.2	9	8.3	869	7.6
Unknown	470		129		116		52		4		771

^aPercentages are calculated without the unknown category