As for survival the relationship between STAT3 (or p-STAT3) expression and patients’ survival prognosis, the outcomes of five studies in Table 3 were not in full accord, but most studies showed the trend that the overexpression of STAT3 (or p-STAT3) was associated with reduced OS, indicating the expression of STAT3/p-STAT3 plays a prognostic role in Chinese breast cancer patients. This evidence concerns the gene STAT3 and breast carcinoma.