We obtained consistent outcomes for the ovarian cancer biomarker subgroups (STAT3 and p-STAT3) (STAT3: OR = 0.22, 95% CI = 0.10–0.47, p < 0.00001; p-STAT3: OR = 0.55, 95% CI = 0.31–0.98, p = 0.042) (Fig. 5). This evidence concerns the gene STAT3 and ovarian cancer.