A one‐ln unit increase in MPB was associated with an OR of 1.11 (95% CI = 1.01–1.22; CLR = 1.21) for hypomethylated CCND2 promoter‐defined BC and with an OR of 0.89 (95% CI = 0.76–1.03; CLR = 1.36) for hypermethylated CCND2 promoter‐defined BC. This evidence concerns the gene CCND2 and breast cancer.