Table 2.

F-values of Significant Effects of Group-by-Night-by-Period ANOVAs of NREM Sleep Spectral Activity for the 6 EEG Frequency Bands Analyzed in F_Z, C_Z, and P_Z Derivations.

	Group effect	Night effect	Period effect	Group × Night interaction	Group × Period interaction	Group × Night × Period interaction
	(df=1,22)	(df=3,66)	(df=3,66)	(df=3,66)	(df=3,66)	(df=9,198)
SWA (1–5 Hz)
FZ	ns	30.4c	39.1c	4.5a	3.7a	4.4b
CZ	ns	33.0c	51.1c	3.5a	3.8a	3.1a
PZ	ns	33.6c	47.5c	ns	ns	ns
Theta (4–8 Hz)
FZ	ns	18.9c	58.2c	4.2b	ns	2.9a
CZ	ns	12.4c	55.2c	5.7b	ns	2.9a
Pz	ns	11.5c	46.3c	ns	ns	ns
Alpha (8–12 Hz)
FZ	ns	7.5b	11.8c	ns	ns	ns
Cz	ns	3.8a	9.3b	ns	ns	ns
Pz	ns	5.7b	9.7b	ns	ns	2.3a
Sigma1 (12–14 Hz)
FZ	ns	10.0c	ns	ns	ns	ns
Cz	4.4a	9.8c	6.8c	ns	ns	ns
Pz	8.0b	9.8c	19.6c	ns	5.3b	ns
Sigma2 (14–16 Hz)
FZ	ns	24.3c	21.0c	ns	ns	3.2a
CZ	ns	29.0c	31.3c	ns	ns	2.4a
PZ	ns	22.8c	14.4c	ns	ns	ns
Beta (16–24 Hz)
FZ	ns	13.9c	10.0c	ns	ns	ns
CZ	ns	18.0c	12.5c	ns	ns	ns
PZ	ns	14.6c	10.5c	ns	ns	ns

^aP ≤0.05; ^bP ≤0.01; ^cP ≤0.001. Probabilities adjusted for repeated measures.

Degrees of freedom are indicated for F_Z and C_Z (see text).