Table 1.

Sleep Measures (Means and SD) for Insomnia and Control Group

	Control Group	Insomnia Group	t value	p
Light Off	24:03 ± 1:59	23:42 ± 2:25	1.54	n.s.
Sleep End	08:13 ± 1:19	08:02 ± 1:46	1.22	n.s.
TIB	483.28 ± 61.12	476.34 ± 62.49	1.08	n.s.
SOL	9.34 ± 5.44	16.08 ± 16.20	6.25	<0.00001
TST	455.64 ± 57.85	413.42 ± 71.38	6.32	<0.00001
MA	10.94 ± 4.53	16.27 ± 9.51	7.66	<0.00001
NA>5	1.07 ± 1.05	3.33 ± 2.56	12.64	<0.00001
WASO	18.35 ± 13.98	45.20 ± 38.16	10.37	<0.00001
SE%	94.18 ± 3.14	86.35 ± 9.25	12.68	<0.00001

Light Off refers to the moment in which subjects go to bed and switch off the light;

Sleep End refers to the moment in which subjects wake up for the last time in the morning; TIB refers to time in bed (min.);

SOL refers to sleep onset latency (min.);

TST, total sleep time (min.);

MA, mean motor activity (number of movement in one minute);

NA>5, number of awakenings longer than 5 minutes;

WASO, wake after sleep onset (min.);

SE%, sleep efficiency.