On the association between p53 expression and RFS of meningioma patients, 3 out of 4 studies [14, 15, 64] with 201 participants showed statistically significant association between high p53 expression and poor RFS (HR = 2.40, 95%CI 1.73 to 3.34, I2 = 0%), Fig 10B. The gene discussed is TP53; the disease is meningioma.