MKI67 and neoplasm: There were statistically significant associations between RS results and age (r = − 0.10; 95CI, − 0.19 to − 0.02), tumor size (r = 0.16; 95CI, 0.07 to 0.24), tumor grade (r = 0.40; 95CI, 0.33 to 0.47), and Ki-67 expression (r = 0.39; 95CI, 0.32 to 0.47).