The Kaplan–Meier analysis indicated that the level of PR expression is correlated with progression-free survival (P < 0.05, Fig. 1E) and overall survival (P < 0.05, Fig. 1F) when the cases were divided into two groups by PR-H-score 100 (Fig. 1G), thereby suggesting that PR expression could be an independent prognostic factor for endometrial cancer. This evidence concerns the gene PGR and endometrial cancer.