Concordance Between Institutional and Central Pathology, Surgery, and Radiology Reviews on the Children's Oncology Group AREN03B2 Renal Tumor Biology and Classification Study.

Raw rate of agreement between institutional and central pathological diagnosis was 91.1% (Cohen's kappa: 0.79 [95% CI: 0.78-0.81]).

Raw rate of agreement between assessments of computed tomography (computed tomography) scans for lung nodules was 96.1% (Cohen's kappa: 0.88 [95% CI: 0.86-0.89]).

Raw rate of agreement between surgical reviews for local stage was 90% (Cohen's kappa: 0.84 [95% CI: 0.83-0.85]).

Raw rate of agreement between calculated institutional and central initial risk assignment was 87% (Cohen's kappa: 0.84 [95% CI: 0.83-0.85]).