The overall survival (OS) of 4.1G in BC. (A) High mRNA level of 4.1G was associated with longer OS in all BC patients. (B–D) High mRNA level of 4.1G was associated with longer OS in ER-positive, TP53 mutant, and LN-negative subtype BC patients. (E–K) High mRNA level of 4.1G was not associated with longer OS in basal-like, luminal A, luminal B, HER2+, TP53 wild, or LN-positive subtype BC patients. (L) High mRNA level of 4.1G was associated with longer OS in luminal A subtype BC patients with Tamoxifen treatment.