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. Author manuscript; available in PMC: 2013 Jul 10.
Published in final edited form as: Breast Cancer Res Treat. 2007 Oct 5;111(2):289–296. doi: 10.1007/s10549-007-9775-5

Table 5.

Interaction between age and ethnicity

Ethnicity Age HBBD
Odds ratio 95% CI
African American
≤45 1 Referent
46–55 3.31 2.35–4.67
>55 1.83 1.38–2.44
Caucasian
≤45 1.44 1.20–1.73
46–55 4.31 3.37–5.51
>55 3.56 2.85–4.46

Interaction: p < 0.01