Table 2.

mean ± SD/median (interquartile range) values for PSG and actigraphy of total sleep time, wake after sleep onset, and sleep efficiency

	Children, n=13	Adults, n=9
	Total sleep time, minutes
PSG	483.4 ± 62.8	435.6 ± 36.9
GT3X+: Sadeh	434.8 ± 55.9*	421.6 ± 48.5
GT3X+: Cole–Kripke	465.2 ± 56.6	449.7 ± 39.5
Actiwatch Spectrum: medium threshold	NA	444.6 ± 53.7
	Wake after sleep onset, minutes
PSG	18.1 ± 14.6, 14.0 (15.0)	36.9 ± 23.6
GT3X+: Sadeh	77.3 ± 37.5, 70.0 (72.0)**	58.1 ± 6.7
GT3X+: Cole–Kripke	49.1 ± 27.3, 45.0 (38.0)**	35.6 ± 9.5
Actiwatch Spectrum: medium threshold	NA	30.2 ± 7.0
	Sleep efficiency, %
PSG	95.2 ± 3.5, 95.1 (2.8)	90.4 ± 4.3
GT3X+: Sadeh	83.6 ± 6.7, 84.0 (14.1)**	85.9 ± 6.4
GT3X+: Cole–Kripke	89.3 ± 4.7, 89.3 (6.4)**	91.6 ± 2.5
Actiwatch Spectrum: medium threshold	NA	92.4 ± 2.1

Notes: Comparison versus PSG,

^*p<0.05,

^**p<0.01.

Abbreviations: NA, not applicable; PSG, polysomnography.