“…Inclusion criteria regarding tumor site, treatment modalities, and clinical stage were different. 66,68 Sixth, the cutoff values for platelet count or PLR were inconsistent among individual studies, which could have resulted in heterogeneity. Some studies excluded patients with conditions that could affect hematologic markers (eg, acute inflammation and autoimmune disease), 34,35,[43][44][45]51 although other studies did not use such criteria.…”