Figure 3.

Receiver–operating characteristic curve demonstrating FORGE score (blue line), AT-FORGE score (=FORGE score combined with brain invasion or increased mitotic count; red line), MIB-1 index (grey line), and mitotic count (green line) in the prediction of progression of intracranial atypical meningiomas after surgery. Optimum threshold of the AT-FORGE score in the prediction of tumor progression was found at ≥5 vs. <5. Sensitivity and specificity of AT-FORGE score using optimum cut-off value were 75.0% and 78.0%, respectively. Dashed lines mark the identified optimum cut-off values.