The association of objective response and overall survival in patients with inoperable or metastatic gastric and esophagogastric junction (EGJ) cancer: A pooled analysis of individual patient data from first-line clinical trials.

4095 Background: The aim of the study is to determine whether the achievement of an objective response to first-line chemotherapy is prognostic of patient’s outcome in gastric/EGJ adenocarcinoma. Methods: Individual patient (pts) data from prospective first-line trials conducted by a single study group were used. Patients received platin/5-FU based chemotherapy with or without docetaxel. Responses were evaluated according to WHO criteria in all trials. Response data, patients’ characteristics (age, sex, entity, histological type, primary location, ECOG PS, and type and number of metastatic sites), type of chemotherapy, and overall survival data were analyzed. Results: 612 pts were included. Median age was 66 yrs; 31.5% had ECOG status 0, 58.3% ECOG 1, and 9.8% ECOG 2 & 3. Gastric primaries were found in 44.4% and EGJ in 35.8% of pts (19.7% were overlapping/not evaluable). According to Lauren classification, 36.8% had intestinal, 32.4% diffuse, and 8.5% mixed types (22.4% were not classifiable). 64.5% had ...