Table 2.

Group comparison of quantitative EEG characteristics

	HC	MCI-AD	MCI-LB	Group comparison
Delta power	14.1 [11.3, 17.0]	14.1 [11.8, 16.3]	14.9 [12.7, 17.1]	F(2, 102) = 0.8, p = 0.47
Theta power	5.7 [4.6, 6.9]	7.0 [6.0, 8.1]	8.8 [7.2, 10.3]	F(2, 102) = 4.8, p = 0.01
				p(HC,MCI-AD) = 0.19 p(HC,MCI-LB) = 0.004 p(MCI-AD,MCI-LB) = 0.46
Pre-alpha power	13.3 [9.9, 16.7]	19.6 [16.1, 23.1]	28.8 [24.2, 33.4]	F(2, 102) = 16.0, p < 0.001
				p(HC,MCI-AD) = 0.006 p(HC,MCI-LB) < 0.001 p(MCI-AD,MCI-LB) = 0.02
Alpha power	39.9 [34.1, 45.6]	33.6 [29.3, 37.9]	28.3 [23.6, 33.1]	F(2, 102) = 5.5, p = 0.005
				p(HC,MCI-AD) = 0.39 p(HC,MCI-LB) = 0.001 p(MCI-AD,MCI-LB) = 0.07
Beta power	26.7 [22.9, 30.4]	25.4 [22.4, 28.4]	18.9 [15.3, 22.5]	F(2, 102) = 8.1, p = 0.001
				p(HC,MCI-AD) = 1.0 p(HC,MCI-LB) < 0.001 p(MCI-AD,MCI-LB) = 0.001
Theta/alpha ratio	0.34 [0.27, 0.40]	0.42 [0.36, 0.47]	0.51 [0.44, 0.57]	F(2, 102) = 7.5, p < 0.001
				p(HC,MCI-AD) = 0.22 p(HC,MCI-LB) = 0.001 p(MCI-AD,MCI-LB) = 0.10
DF, all electrodes	8.4 [8.0, 8.9]	8.0 [7.6, 8.3]	7.2 [6.8, 7.6]	F(2, 102) = 8.7, p < 0.001
				p(HC,MCI-AD) = 0.29 p(HC,MCI-LB) < 0.001 p(MCI-AD,MCI-LB) = 0.01
DF, occipital electrodes	8.5 [8.1, 9.0]	8.0 [7.6, 8.3]	7.3 [6.9, 7.7]	F(2, 102) = 8.7, p < 0.001
				p(HC,MCI-AD) = 0.16 p(HC,MCI-LB) < 0.001 p(MCI-AD,MCI-LB) = 0.03
DFV, occipital electrodes	1.3 [0.9, 1.6]	1.4 [1.1, 1.7]	1.0 [0.8, 1.2]	F(2, 102) = 3.6, p = 0.03
				p(HC,MCI-AD) = 0.54 p(HC,MCI-LB) = 1.0 p(MCI-AD,MCI-LB) = 0.17

Mean [95% confidence interval] of different quantitative EEG characteristics. Group comparisons were performed using univariate ANOVAs followed by post hoc tests, Bonferroni-corrected for multiple comparisons. Sex was included as a covariate

DF dominant frequency, DFV dominant frequency variability, HC healthy controls, MCI-AD mild cognitive impairment with Alzheimer’s disease, MCI-LB probable mild cognitive impairment with Lewy bodies