BMI (Table 4): CYP4B1-rs2297813 might be a risk factor for increasing the incidence of BC in participants with BMI ≤ 24 kg/m2 under the allele (OR = 1.53, 95% CI 1.01–2.32, p = 0.040), dominant (OR = 1.69, 95% CI 1.06–2.69, p = 0.027), over-dominant (OR = 1.72, 95% CI 1.07–2.77, p = 0.026), and log-additive (OR = 1.56, 95% CI 1.02–2.39, p = 0.041) models. Here, CYP4B1 is linked to breast cancer.