Table II.

Cancer Characteristics for Women with an Interval Cancer or Screen-detected Cancer (N=1458)

Characteristicsα	Interval Cancer Diagnosis		Screen-detected Cancer Diagnosis		Total
	N	%	N	%	N	%
Total	204	14	1254	86	1458	100
Cancer Type
DCIS	23	11.3	274	21.9	297	20.4
Invasive Lobular	51	25.0	175	13.8	226	15.5
Invasive Other (including invasive ductal	130	63.7	805	64.2	935	64.1
Stage
0	23	11.4	274	22.2	297	20.7
I	82	40.1	708	57.3	790	55.0
II/III/IV	96	47.8	253	20.5	349	24.3
ER
Positive/elevated	155	81.2	1021	88.6	1176	87.5
Negative/normal	36	18.9	132	11.5	168	12.5
PR
Positive/elevated	135	71.1	864	75.9	999	75.2
Negative/normal	55	29.0	274	24.1	329	24.8
HER2/Neu
Positive/elevated	SCS β	SCS	SCS	SCS	58	9.8
Negative/normal	SCS	SCS	SCS	SCS	536	90.2
Tumor Size
<5mm	14	6.9	131	10.9	145	10.3
5–9mm	14	6.9	325	27.0	339	24.1
10–14mm	36	17.8	293	24.3	329	23.4
15–19mm	43	21.3	210	17.4	253	18.0
20mm+	95	47.0	247	20.5	342	24.3
Grade
Grade 1 well-differentiated	42	21.9	311	26.8	353	26.1
Grade 2 moderately-differentiated	86	44.8	560	48.3	646	47.8
Grade 3 poorly-differentiated	64	33.3	289	24.9	353	26.1
Nodal Status
No positive nodes	160	78.4	1095	87.3	1255	86.1
≥ 1 positive nodes	44	21.6	159	12.7	203	13.9
Breast Cancer Laterality
Unilateral	SCS	SCS	SCS	SCS	1421	97.5
Bilateral	SCS	SCS	SCS	SCS	37	2.5

^αMissing (N): Stage (22); ER (130); PR (130); Her2/Neu (864); Tumor size (50); Grade (106).

^βSCS: Small cell size.