Table 4.

Odds of HER-2 Positive Tumor in Women Diagnosed in 2005 With Early Stage Breast Cancer Stratified by Age at Diagnosis and p-value for Covariate Effect

	Age 49 Years or Younger N = 344	Age 50 Years or Older N = 428
Race/Ethnicityb	p-value = .49	p-value = .05
White non-Hispanic	1	1
Black non-Hispanic	0.46 (0.18, 1.18)	0.72 (0.28, 1.89)
Hispanic	0.49 (0.14, 1.67)	2.52 (0.93, 6.81)
Asian/PI	0.74 (0.29, 1.88)	2.52 (0.86, 7.39)
AI/AN	0.98 (0.30, 3.26)	1.56 (0.64, 3.85)
ER/PR	p-value = .55	p-value = .41
ER or PR positive	1	1
Both Negative	0.71 (0.24, 2.16)	1.67 (0.49,5.74)
Nodal status	p-value = .71	p-value = .82
No nodes positive	1	1
Positive nodes	1.20 (0.44, 3.35)	0.91 (0.40, 2.06)
Tumor size	p-value = .21	p-value = .70
<2 cm	1	1
2–4 cm	1.66 (0.50, 5.59)	0.67 (0.24, 1.86)
>4 cm	3.85 (0.84, 17.72)	1.02 (0.30, 3.58)
Grade	p-value = .07	p-value = .03
I or II	1	1
III or IV	2.59 (0.92, 7.34)	3.82 (1.15, 12.66)

Asian/PI - Asian/Pacific Islander, AI/AN - American Indian/Alaska Native.