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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