Table 2 The results of non-liner relationship between BMI and breast cancer risk
| Â | 21.5Â kg/m2 | 22.5Â kg/m2 | 23.5Â kg/m2 | 25.0Â kg/m2 | 26.5Â kg/m2 | 30.0Â kg/m2 |
|---|---|---|---|---|---|---|
Post | 1(Reference) | 1.03(1.02–1.05) | 1.07(1.04–1.10) | 1.12(1.08–1.17) | 1.17(1.11–1.23) | 1.26(1.18–1.35) |
Post-America | 1(Reference) | 1.03(1.02–1.05) | 1.07(1.03–1.10) | 1.11(1.06–1.17) | 1.16(1.09–1.24) | 1.26(1.15–1.38) |
Post-Europe | 1(Reference) | 1.02(1.00–1.04) | 1.04(1.01–1.09) | 1.08(1.02–1.15) | 1.12(1.03–1.21) | 1.19(1.06–1.33) |
Post-Asia | 1(Reference) | 1.10(1.07–1.13) | 1.19(1.13–1.25) | 1.32(1.24–1.41) | 1.42(1.31–1.54) | 1.60(1.37–1.87) |
Post-HRTa non user | 1(Reference) | 1.04(1.02–1.07) | 1.09(1.04–1.14) | 1.16(1.08–1.25) | 1.23(1.12–1.35) | 1.37(1.20–1.57) |
Post-ER + b | 1(Reference) | 1.03(1.01–1.04) | 1.06(1.03–1.09) | 1.10(1.05–1.15) | 1.14(1.08–1.22) | 1.23(1.15–1.32) |
Pre-Europe | 1(Reference) | 0.98(0.96–1.00) | 0.95(0.92–0.99) | 0.91(0.86–0.96) | 0.87(0.81–0.93) | 0.76(0.67–0.86) |
Pre-Asia | 1(Reference) | 1.00(0.97–1.04) | 1.02(0.96–1.08) | 1.07(0.99–1.16) | 1.16(1.05–1.27) | 1.48(1.20–1.83) |