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Forest plots of the meta-analyses per cognitive test. Panel (A) demonstrates the effect sizes for cross-sectional studies. Panel (B) shows the effect sizes for longitudinal studies. The gray dotted line represents the cutoff for largest effect sizes (hedges g of >−0.8) towards impairment in glioma patients The number of included patients per analysis is represented by the size of the circles. The crosses indicate the effect sizes per included study.
