Table 2.

Reported sleep parameters determined by polysomnography and actigraphy

Parameter	Polysomnography (n = 46)	Actigraphy (n = 46)
Total minutes analysed	37,938	37,938
Total sleep time: min (mean ± SD)	462.5 ± 341.3	508.8 ± 321.8
Wake time: min (mean ± SD)	308.2 ± 259.1	292 ± 234
Sleep fragmentation index (mean ± SD)		46.5 ± 19.7
% recording time asleep (mean ± SD)	41.8 ± 27.15	69.2 ± 19.4
Awakenings (mean ± SD)	43.3 ± 35.3	19.8 ± 19.3
Arousal index	14.3 ± 13.1
Stage N1 (%)	10.4
Stage N2 (%)	75.5
SWS (%)	10
REM (%)	4.1

SWS slow wave sleep, REM rapid eye movement