When MGAT4EP expression was analyzed in conjunction with TNM and age, univariate Cox regression analysis revealed that MGAT4EP expression is a negative prognostic factor for breast cancer, with a Hazard Ratio (HR) of 4.513 (95% CI: 2.024–10.060), p < .001 (Supplementary Figure S2a). This evidence concerns the gene MGAT4EP and breast carcinoma.