647Use of menopausal hormone therapy before and after ovarian cancer diagnosis and ovarian cancer survival

Background Menopausal hormone therapy (MHT) use before ovarian cancer (OvCa) diagnosis has been suggested to improve survival but data on type, duration and use after treatment for OvCa are scarce. Methods We investigated MHT use and OvCa survival among participants with newly diagnosed OvCA in the Ovarian cancer Prognosis And Lifestyle (OPAL) Study. Analysis of pre-diagnosis use was restricted to 661 post-menopausal women and analysis of...