Table 2.

Wilcoxon signed-rank tests of SWA, spectral power in delta and in slow delta for the 20 sec prior to episode onset and the 180 sec baseline (medians are reported)

	SWA			Delta			Slow delta
	180 s	20 s	W	180 s	20 s	W	180 s	20 s	W
Fz	0.99	1.09	137*	0.98	1.12	171*	1.02	0.96	−5
Cz	0.99	1.10	113	0.97	1.11	121°	1.00	1.13	85
Pz	0.99	1.05	87	1.00	1.07	39	0.98	1.17	73

^°P < 0.05,

^*P < 0.01,

^**P < 0.001