Multivariable binary logistic regression analysis, including age (>60/≤60), sex (female/male), serum CRP (≤1.37 mg/L/>1.37 mg/L), plasma fibrinogen (≤2.85 g/L/>2.85 g/L), WHO grade (1/2), and meningioma location (cranial/spinal), was performed to identify variables predicting an increased MIB-1 index (≥5%). This evidence concerns the gene CRP and meningioma.