Fig. 6.

Impact of treatment and development of nomogram for tumor recurrence. Progression-free survival of 527 meningioma patients in the discovery cohort, stratified by (A–C) extent of resection status (GTR vs STR) for each Integrated Grade, and (D) primary vs recurrent tumor status. (E) Multivariate Cox proportional hazards model incorporating Integrated Grade with extent of resection, tumor volume, and primary vs recurrent tumor status. (F) Nomogram for predicting 1-, 3-, and 5-year recurrence risk based on the four listed parameters. Abbreviation: GTR, gross total resection; STR, subtotal resection.