Fig. 1: High level of serum ionized calcium was positively asscoiated with advanced endometrial cancer.

Relationship between ionized serum calcium concentration and clinicopathological characteristics, including different a FIGO stage. b Grade. c Lymph node metastasis. d Ascites cytology. e LVSI. Wilcoxon signed-rank test and logistic regression were used to analyze the relationship between ionized calcium level and clinical pathologic features. *p < 0.05; **p < 0.01; ***p < 0.001. G, grade; LVSI, lymph-vascular space invasion.