TGFB1 and breast cancer: Again, none of the models showed a significant association between the TGF-β1*6A polymorphism and BC (Combined analysis: overall allele (OR)  =  1.123, 95% CI = 0.967–1.305, p = 0.129; homozygous: OR = 1.051, 95% CI = 0.726–1.521, p = 0.793; heterozygous: OR = 1.097, 95% CI = 0.996–1.208, p = 0.060; recessive: OR = 1.051, 95% CI = 0.726–1.520, p = 0.794; dominant: OR = 1.081, 95% CI = 0.989–1.182, p = 0.087) (Figure 4).