Fig. 3From: Adjuvant radiotherapy versus observation following gross total resection for atypical meningioma: a systematic review and meta-analysisForest plots comparing the risk of local recurrence between the adjuvant RT cohort and the observation cohort in subgroups using a 1993 or 2000 WHO criteria and b 2007 or 2016 WHO criteria for included studies. The benefit of adjuvant RT in local recurrence is significantly higher in a subgroup using the 2007 or 2016 WHO criteriaBack to article page