Fig. 5

Survival curves for metastatic gastric adenocarcinoma patients who undergo gastrectomy and those without primary tumor surgery. Total scores were calculated according to preoperative nomogram. a: Total score cut-off value of 28 was set in development cohort, Cox proportional hazards regression was used to compare their survival with contemporarily registered cases who without primary tumor resection. b: Patients in validation cohort were divided into two groups by using a total score cut-off value of 28, Cox proportional hazards regression was used to compare their survival with contemporarily registered cases who without primary tumor resection