Table 3.

Spearman rank correlations (r_s) between sleep variables measured by actigraphy and parental reported sleep problems in children/adolescents with Angelman syndrome^*

	Children’s Sleep Habits Questionnaire sub-scales
	Sleep anxiety	Sleep delay	Sleep duration	Night wakenings	Parasomnias
Child actigraphy – polysomnography night
Sleep latency
Wake after sleep onset	−0.95		0.82
Fragmentation index		−0.76
Time in bed	−0.86
Child actigraphy – in home
Sleep latency
Fragmentation index			0.60
Sleep duration				0.66	0.69
Parent actigraphy – in home
Wake after sleep onset			0.59
Fragmentation index			0.70

^*Only values with r_s > 0.50 and P < 0.001 are reported.