2.2. Variable Collection and Reclassification
tumor
TUMOR
The diagnosis and treatment process of EOC patients in the SEER database in the past period were reviewed to identify prognostic factors for CSS. We obtained the following variables of selected patients from the SEER database directly: age at diagnosis, race, year of diagnosis, marital status, histological type, tumor grade, tumor laterality, FIGO stage, clinical AJCC 