Treatment patterns for ductal carcinoma in situ from 2000–2010 across six integrated health plans

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Table 1 Characteristic of DCIS patient population from six Kaiser Permanente regions, 2000–2010 (N = 9437)

Characteristic	Number	Percent
Race/Ethnicity
White	5978	63.3
African American	1086	11.5
Asian	1455	15.4
Hispanic	918	9.7
Year of Diagnosis
2000-2002	2043	21.6
2003-2004	1650	17.5
2005-2006	1837	19.5
2007-2008	2001	21.2
2009-2010	1906	20.2
Age at Diagnosis
<50 years	1978	21.0
50 – 59 years	2917	30.9
60 – 69 years	2651	28.1
> = 70 years	1891	20.0
Comorbidity Index
0	6898	73.1
1	1654	17.5
2+	885	9.4
Nuclear Grade
Low/Intermediate	4702	49.8
High	3727	39.5
Unknown	1008	10.7
First course surgical therapy
Breast conserving surgery (BCS)	2689	28.5
BCS + radiation	3978	42.2
Bilateral mastectomy	448	4.7
Unilateral mastectomy	2322	24.6
Hormone Therapy*
Yes	2625	27.8
No	6812	72.2