FIG. 2.

Meta-analyses examining factors associated with preoperative seizures in supratentorial meningioma. Statistically significant predictors of postoperative seizure freedom included male (vs female) sex (A); absence (vs. presence) of headache (B); the presence of peritumoral edema on neuroimaging (vs. no or minimal edema) (C); and skull base (vs. non–skull base) tumor location (D). The effect size for each study is represented as the OR of factors associated with preoperative seizures (larger OR indicates greater likelihood of seizures), with proportional study weight estimated by the size of each point. Error bars represent the 95% CI, with a dotted tail indicating an upper limit off of the scale. The size of each point estimates proportional study weight, and the vertical dashed line represents OR = 1.