Progesterone Receptor Status Is a Significant Prognostic Variable of Progression-Free Survival in Advanced Epithelial Ovarian Cancer

The purpose of this study was to determine if tumor estrogen receptor (ER) or progesterone receptor (PR) status were significant prognostic variables of survival and progression-free survival among patients with International Federation of Gynecology and Obstetrics (FIGO) stage III and IV epithelial ovarian cancer. Tumor steroid receptor status was evaluated among 67 consecutive patients who underwent primary surgery from June 1983 through September 1990. Characteristics of receptor-negative and receptor-positive populations were compared by chi-square analysis. Univariate and multivariate analyses were used to identify variables prognostic of survival and progression-free survival. Fifty-one of 67 patients (76.1%) had ER-positive tumors and 31 (46.3%) patients had PR-positive tumors. Significant differences between receptor-positive and receptor-negative populations were not observed. Neither univaritate nor multivariate analysis identified ER or PR status as significant prognostic variables of survival (p = 0.93 and p = 0.06. rcspectively). Progesterone receptor-positive status was a significant prognostic variablc of progression-free survival in both univaritate (p = 0.03) and multivariate (p =0.04) analyses even after adjustment for residual disease and patient age. Estrogen receptor status was not a significant prognostic indicator of progression-free survival in either univariate or multivariate analyses. Progesterone receptor-positive tumor status is shown to be an independent prognostic variable of improved progression-free survival among patients with advanced epithelial ovarian cancer.