TMEM43 and breast cancer: Among women in the hypomethylated LUMA stratum, there were increased odds of BC among women in the highest (vs. lowest) tertiles of MPB (OR = 1.41, 95% CI = 0.90–2.21; CLR = 2.46) and PPB (OR = 1.50, 95% CI = 0.95–2.36; CLR = 2.48), which were attenuated among women in the hypermethylated LUMA stratum.