Table 1.

Descriptive statistics and coefficients of variation of NREM sleep EEG lnSWA and spectral slopes (left frontal recording location: F3).

	Cycle	Valid N	Mean	Minimum	Maximum	Std.Dev.	Coef.Var.
ln SWA+4	1	251	10.65	8.98	13.12	0.81	7.64
	2	251	9.68	7.63	12.05	0.81	8.38
	3	249	8.85	6.15	11.32	0.84	9.46
	4	240	8.18	1.77	10.18	0.91	11.11
slope+4	1	251	6.82	6.06	7.52	0.25	3.72
	2	251	6.72	6.08	7.41	0.23	3.38
	3	249	6.58	5.99	7.08	0.21	3.16
	4	240	6.50	5.70	7.05	0.21	3.30