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. Author manuscript; available in PMC: 2018 Apr 17.
Published in final edited form as: Breast Cancer Res Treat. 2015 May 27;152(1):193–197. doi: 10.1007/s10549-015-3411-6

Table 1.

Effect of including BMI in IBIS model according to inherited risk factors

Inherited risk factors
No. affected first-degree relatives
10-year risk (%)
BMI = 27 kg/m2 BMI = 21 kg/m2 Risk difference
0 1.8 1.5 0.3
1 3.8 3.0 0.8
2 5.0 4.0 1.0
3 9.7 7.8 1.9
3 + BRCA1 mutation carrier 24.6 20.1 4.5