Table 2 Group comparison of EEG characteristics and NBM volume

Individual alpha peak

8.8 [8.4, 9.2]

7.4 [6.3, 8.4]

6.4 [6.1, 6.7]

F₂ = 42.1, p < 0.001^a

p (HC, AD) = 0.004

p (HC, LBD) < 0.001

p (AD, LBD) = 0.092

Alpha reactivity

0.56 [0.50, 0.63]

0.24 [0.12, 0.34]

0.08 [0.03, 0.14]

F₂ = 59.9, p < 0.001^b

p (HC, AD) < 0.001

p (HC, LBD) < 0.001

p (AD, LBD) = 0.014

Eyes-closed alpha power

49.1 [41.9, 56.3]

34.4 [27.5, 41.3]

39.7 [35.8, 43.5]

F₂ = 7.9, p = 0.019^a

p (HC, AD) = 0.018

p (HC, LBD) = 0.25

p (AD, LBD) = 0.56

Eyes-open alpha power

18.9 [16.1, 21.7]

24.2 [19.4, 29.0]

36.7 [32.4, 41.1]

F₂ = 35.5, p < 0.001^a

p (HC, AD) = 0.25

p (HC, LBD) < 0.001

p (AD, LBD) = 0.005

NBM volume

0.19 [0.18, 0.20]

0.17 [0.16, 0.17]

0.16 [0.15, 0.17]

F₂ = 13.3, p < 0.001^b

p (HC, AD) = 0.003

p (HC, LBD) < 0.001

p (AD, LBD) = 1.0