Correlations between estimating GFR methods and oncological outcomes during cancer chemotherapy

Abstract

Background: Glomerular filtration rate (GFR) measurements are critical in patients with cancer. A variety of methods are used to calculate the estimated GFR. The aim of this study is to investigate whether there is a correlation between these methods and oncologic outcomes according to the stage and treatment agents. Methods: A total of 153 patients were retrospectively recruited. All GFR measurement methods was determined in all patients, before the first cycle of chemotherapy and before the subsequent administrations. Results: In the study population 40% of whom received platinum-based chemotherapy. In this group, overall survival was statistically significant in patients with a CKD-EPI creatinine value of 65 or greater (p:0.023). When we separated the arms according to the stage, there was no relationship between CKD-EPI Cystatin C and progression-free survival in metastatic patients (p: 0.13). In the non-metastatic group, median DFS was 7 months and OS was 13.9 months in patients with CKD-EPI Cystatine C level above 45 (p:0.005). Conclusions: Both CKD-EPI creatinine and CKD-EPI cystatin C were significantly associated with overall survival and diseasefree survival in patients receiving platinum-based chemotherapy. When assessed according to the stage, there was a general survival relationship with CKD-EPI cystatin C in the non-metastatic group and in the other groups there was no significant correlation with the estimated GFR measurements.