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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 4.

Interaction between risk level and age

Age Risk Level HBBD
Odds ratio 95% CI
≤45
Risk 1 1 Referent
Risk 2 4.42 3.70–5.33
Risk 3 14.9 6.35–34.9
46–55
Risk 1 2.02 1.54–2.65
Risk 2 17.6 12.8–24.2
Risk 3 29.5 10.7–81.2
>55
Risk 1 1.82 1.45–2.29
Risk 2 13.4 10.1–17.9
Risk 3 24.9 10.8–57.6

Interaction: p < 0.01