Fig. 4From: Adjuvant radiotherapy versus observation following gross total resection for atypical meningioma: a systematic review and meta-analysisForest plots showing PFS at each period of 1-year, 3-year, 5-year, and > 5-year between the adjuvant RT cohort and the observation cohort. The advantage of PFS is observed in the adjuvant RT cohort, showing increasing significance with longer periodBack to article page