Subgroup analysis of adjusted HRs by cancer types showed that STAT5a expression was significantly associated with favorable overall survival in breast cancer (lnHR = −0.6091 [−1.0810, −0.1372], P-value = 0.0114) (Figure 7) aligning with the results from a subgroup analysis of the unadjusted HRs. The gene discussed is STAT5A; the disease is breast carcinoma.