There was no heterogeneity in associations by breast cancer stage at diagnosis (breast cancer-specific mortality phet ≥ 0.18; all-cause mortality phet ≥ 0.43), and we observed no heterogeneity in associations by menopausal status at blood collection for sRANKL and sRANKL/OPG (phet ≥ 0.44). This evidence concerns the gene TNFRSF11B and breast cancer.