Table 2.

Treatment Concordance by Patient Characteristics

Characteristics			Treatment Discordant	Weighted %
ALL PATIENTS			813	12.4
Age at diagnosis (yrs)		P <0.01
	<40		35	7.96
	40–49		120	7.56
	50–64		243	10.45
	65–69		83	11.34
	70+		332	20.50
Race/ethnicity		P =0.11a
	White		417	12.00
	Black		264	14.18
	Hispanic		48	13.04
	Other race/ethnicity		61	15.86
	Unknown		23	7.82
Insurance		P <0.01
	Private		316	11.52
	Medicare w/ supplement		220	9.65
	Medicaid/Medicare only/Dual		214	17.88
	None/Uninsured/Unknown		63	15.51
Census-tract Povertyb		P=0.04a
	< 20% (ref)		575	11.93
	20% +		235	14.30
	Unknown		3	20.48
Urban Rural Residence		P =0.02a
	Urban		428	13.75
	Urban Rural Mix		269	10.73
	Rural		113	10.96
	Unknown		3	21.92
Census-tract Educationc		P =0.20a
	High		450	11.91
	Low		360	13.27
	Unknown		3	20.48
State of Residence		P <0.01
	NC		95	10.28
	GA		194	10.27
	LA		143	11.23
	KY		52	11.86
	WI		76	15.62
	MN		66	8.59
	CA		187	17.88
Surgical facility CoC status		P = 0.08a
	Yes		362	11.15
	No		316	13.12
	Unknown		135	14.80
Clinical Tumor stage		P <0.01
	DCIS < 0.5		5	2.51
	DCIS > 0.5		162	19.50
	Stage I (N0, < 5cm)		369	11.16
	Stage IIA (N0, <5cm)		162	14.54
	Stage IIA (N1, < 5cm)		54	8.82
	Stage IIB (N0, > 5cm)		33	28.45
	Stage IIIA (N2, < 5cm)		7	5.57
	Stage IIIA (N1, > 5cm)		16	10.95
	Stage IIIA (N2, > 5cm)		5	18.58
Lymph node status		P =0.26a
	Negative		269	7.63
	Positive		149	8.79
	Undetermined		395	33.94
Comorbidity		P <0.01a
	No		284	10.18
	Mild		326	11.86
	Moderate/Severe		167	18.48
	Unknown		36	32.34
Surgery		P <0.01
	Mastectomy		52	2.11
	BCS		681	17.85
Lymph node dissection	No	P< 0.01	417	35.43
	Yes		395	7.62

^aIgnores ‘Unknown’ or ‘Undetermined’ category

^bHigh poverty was defined as 20% or more of persons with income below the federal-defined poverty level.

^cLow education was defined as 25% or more of adults (aged 25 years and older) with less than a high school education.

^dBorderline ER or PR was grouped with the ER+ and/or PR+ group.