Table 1.

Characteristics of incident invasive breast cancer cases who survived 12 or more months (Subcohort – 15% sample of all eligible cases).

Characteristica	Subcohort (15% sample weight 6.67) N=771		Cases (Breast Cancer Deaths) N=449
	N	%	N	%
Age Group
<40	49	7.1	53	11.8
40–49	166	23.9	132	29.4
50–59	249	35.8	159	35.4
60–69	231	33.2	105	23.4
Ethnicity
Hispanic	176	25.3	156	34.7
Non-Hispanic	519	74.7	293	65.3
Year of Diagnosis
1997–2000	206	29.6	190	42.3
2001–2004	197	28.3	144	32.1
2005–2009	292	42.0	115	25.6
Tumor Sizeb
≤ 1.0 cm	160	24.5	27	6.4
>1–3 cm	356	54.6	204	48.5
>3–5 cm	72	11.1	85	20.1
>5 cm	32	4.9	40	9.5
Chest wall/Skin	32	4.9	65	15.4
Missing	42		28
Number of Positive Nodes
0	454	66.6	151	34.6
1–3	159	23.4	165	37.8
≥4	68	10.0	121	27.6
Missing	14		12
Tumor Grade
Grade I	182	28.1	37	8.9
Grade II	257	39.7	129	31.0
Grade III/IV	208	32.1	250	60.1
Missing	48		33
Estrogen Receptor
Positive	553	82.4	297	68.6
Negative	118	17.6	136	31.4
Missing	24		16
Progesterone Receptor
Positive	469	72.8	226	54.3
Negative	175	27.2	190	45.7
missing	51		33
Her2/neu
Positive	94	16.6	53	23.8
Negative	471	83.3	170	76.2
missing	130		38

^aTumor characteristics, including estrogen receptor positivity, are influenced by the study restriction to stages I–III and a minimum of 12 months survival.

^bTumor size categorized to facilitate assessment according to National Comprehensive Cancer Network cut points (Figure 2). Note that most women with missing values had American Joint Commission on Cancer (AJCC) tumor size = T2 (2–5 cm) but actual size unknown; thus, they could not be assigned to the ≤ 3 cm or > 3 cm categories.