Table 6.

Genetic and environmental correlations (ρG and ρE, respectively) between breast density measures, sex-hormone levels and BMI, n = 1,268

Trait 1Trait 2ρPρG ± SEP value (ρG = 0)ρE ± SEP value (ρE = 0)
Density measures
 Percentage densityBMI−0.46−0.51 ± 0.075.2 × 10−7−0.33 ± 0.160.09
 Dense areaBMI−0.17−0.18 ± 0.090.08−0.17 ± 0.180.35
 Nondense areaBMI0.690.75 ± 0.046.6 × 10−140.53 ± 0.130.003
Hormone measurement
 EstradiolBMI0.460.57 ± 0.101.3 × 10−50.33 ± 0.150.08
 TestosteroneBMI0.140.15 ± 0.170.370.16 ± 0.140.27
 SHBGBMI−0.45−0.41 ± 0.093.0 × 10−4−0.53 ± 0.120.002