Sex-related differences in sleep slow wave activity in major depressive disorder: a high-density EEG investigation

Table 2 SWA time course variables derived from fitted exponential decay functions*

	MDD	HC		MDD Females	HC Females		MDD Males	HC Males
	(N = 30)	(N = 30)	p	(N = 19)	(N= 19)	p	(N= 11)	(N= 11)	p
R²	0.63	0.55	--	0.71	0.51	--	0.66	0.65	--
SWA₀	177.34	141.00	0.10	230.04	146.86	0.03	150.79	137.30	0.68
(CI)	(143.41-211.27)	(113.44-168.55)		(176.43-283.66)	(95.57-198.15)		(89.50-212.09)	(102.63-171.97)
r	0.0108	0.0063	0.18	0.0112	0.0053	0.15	0.0178	0.0082	0.16
(CI)	(0.0060-0.155)	(0.0017-0.0110)		(0.0060-0.0163)	(−0.0011-0.0116)		(0.0057-0.0299)	(0.0011-0.0154)
SWA_∞	58.30	45.82	0.52	53.24	36.49	0.63	74.35	55.74	0.28
(CI)	(41.86-74.74)	(10.23-81.40)		(33.41-73.08)	(−33.48-106.47)		(60.13-88.56)	(22.47-89.02)

*Values derived from exponential functions that were fitted to the data using the equation SWA_t = (SWA₀ * e^-rt) + SWA_∞, in which SWA_t is the SWA value at a given time point t, SWA ₀ represents the hypothetical SWA value at time 0, t indicates time (min) from sleep onset, r is the rate (min^-1) of exponential decay, and SWA _∞ indicates the SWA value of the decay function’s asymptote. CI denotes the 95% confidence interval. R ² for the exponential function reflects goodness of fit.

ISSN: 1471-244X