https://www.selleckchem.com/Proteasome.html 15 times higher than that measured using Cobas E601, the concentrations of AMH measured by UniCel DxI 800 were about 0.05 times higher than that measured using iFlash 3000, serum AMH concentrations measured by the iFlash3000 were about 0.19 times higher than that measured using Cobas E601. The concordance correlation coefficient ρc was 0.921, 0.909 and 0.978 for the UniCel DxI 800 versus the Cobas E601, the iFlash 3000 versus the UniCel DxI 800, and the iFlash3000 versus the Cobas E601, respectively. The three measurement systems have good correlation with each other for determining serum AMH. The three measurement systems have good correlation with each other for determining serum AMH. Circular RNAs (circRNAs) are novel biomarkers that are widely investigated in various cancers. There is increasing evidence that the expression levels of circRNAs are upregulated or downregulated in various cancers, but the overall prognostic efficiency of circRNAs in gastric cancer (GC) remains unclear. Therefore, this meta-analysis studies the relationship between circRNA expression and the prognosis of gastric malignancies. A systematic search was conducted in the PubMed, Web of Science (WOS), EMBASE, and Cochrane Library databases. Eligible studies reporting on the associations of circRNAs with the clinicopathological characteristics and prognosis of GC patients were included. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were utilized to assess clinicopathological parameters. Hazard ratios (HRs) and 95% CIs were used to evaluate the prognostic value of circRNAs using RevMan 5.3 and Stata 15.1 software. Fifteen eligible studies, including 13 for clinicopathological features and 15 for prognosis, were included in our study. For clinicopathological parameters, the high expression of oncogenic circRNAs was significantly associated with poor clinicopathological features, and the high expression of tumor-suppressor circRNAs was