Table 1.

Characteristics of the KPNC study population at time of breast cancer diagnosis of patient diagnosis in pre-outreach (2005–2007) and post-outreach (2012–2014) periods.

	2005–2007 (n = 3,580)		2012–2014 (n = 4,287)
Characteristics	n	(%)	n	(%)
Stage
Stage I	1,951	54.5%	2,442	57.0%
Stage II	1,299	36.3%	1,439	33.6%
Stage III	330	9.2%	406	9.5%
Chemotherapy	1,306	36.5%	1,555	36.3%
Radiation therapy	1,015	28.4%	2,071	48.3%
Age at diagnosis
< 50 yrs	641	17.9%	764	17.8%
50–59 yrs	1,005	28.1%	1,074	25.1%
60–69 yrs	989	27.6%	1,391	32.4%
70–84 yrs	858	24.0%	948	22.1%
>=85 yrs	87	2.4%	110	2.6%
Race/Ethnicity
Asian/Pacific Islander	461	12.9%	707	16.5%
African American	214	6.0%	272	6.3%
Hispanic	391	10.9%	498	11.6%
Native American/Other	4	0.1%	15	0.3%
Unknown	2	0.1%	8	0.2%
Non-Hispanic White	2,508	70.1%	2,787	65.0%
Median household income
< 50K	652	18.2%	737	17.2%
50–<100K	1,950	54.5%	2,315	54.0%
100K+	973	27.2%	1,235	28.8%
Unknown	5	0.1%	0	0.0%
Education: less than high schoola
< 10%	2,910	81.3%	3,463	80.8%
10–<20%	457	12.8%	576	13.4%
20+%	208	5.8%	248	5.8%
Unknown	5	0.1%	0	0.0%
Education: high schoolb
< 10%	444	12.4%	503	11.7%
10–<20%	889	24.8%	1,088	25.4%
20+%	2,242	62.6%	2,696	62.9%
Unknown	5	0.1%	0	0.0%
Education: more than high schoolc
< 25%	43	1.2%	63	1.5%
25–<50%	512	14.3%	627	14.6%
50+%	3,020	84.4%	3,597	83.9%
Unknown	5	0.1%	0	0.0%

^a,b,c:Income and education are based on U.S. Census block of residence. To interpret the “Education: less than high school” variable, 81.3% of patients in the pre-outreach period (diagnosis in 2005–2007) lived in a Census block in which <10% had less than high school education.