Table 3.

Log-transformed spectral activity in control and PTSD groups during NREM and REM sleep (mean ± standard deviation)

		Control		PTSD		t	p	g
		Mean	SD	Mean	SD
NREM	Delta	1.87	0.17	1.88	0.13	−0.207	0.836	0.05
	Theta	1.18	0.17	1.17	0.17	0.372	0.711	0.09
	Alpha	0.81	0.21	0.80	0.23	0.069	0.945	0.02
	Sigma	0.54	0.18	0.56	0.19	−0.471	0.639	0.10
	Beta	0.29	0.13	0.33	0.14	−1.458	0.149	0.32
REM	Delta	1.26	0.14	1.29	0.15	−0.906	0.367	0.19
	Theta	0.95	0.15	0.92	0.16	0.719	0.474	0.16
	Alpha	0.60	0.17	0.60	0.21	0.083	0.934	0.02
	Sigma	0.23	0.17	0.21	0.18	0.344	0.731	0.08
	Beta	0.37	0.18	0.40	0.21	−0.945	0.347	0.23

NREM = Non-rapid eye movement sleep; REM = rapid eye movement sleep; Delta = 0.5 – 4 Hz; Theta = 4 – 8 Hz; Alpha = 8 – 12 Hz; Sigma = 12 – 16 Hz; Beta = 16 – 32 Hz: Hedge’s g used due to unequal sample sizes