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Table 1 Effect sizes of quantitative EEG phenotypes in children with AS. Altered coherence and decreased spindles are less robust than increased delta power

From: Abnormal coherence and sleep composition in children with Angelman syndrome: a retrospective EEG study

Measure p value Cohen’s d
Delta power (wake) [6] < 0.0001 2.198
Overall coherence ratio (wake) 0.0016 0.747
Delta power (sleep) [6] < 0.0001 2.058
Gamma coherence ratio (sleep) < 0.0001 1.033
Spindle frequency (sleep) 0.0002 1.290