However, the HR of these three genes suggested all of them are risk factors for OS in ovarian cancer patients (the HR = 1.72 for OCT4, 1.65 for SOX2 and 1.36 for NANOG. On the other hand, we also analyzed the associations using the RNAseq data of 376 patients with primary ovarian cancer from GDC TCGA Ovarian Cancer (OV) cohort in the database of UCSC Xena. This evidence concerns the gene NANOG and ovarian cancer.