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Table 2 Standard EEG and quantitative EEG parameters

From: Serum anticholinergic activity and cerebral cholinergic dysfunction: An EEG study in frail elderly with and without delirium

  Cognitively Unimpaired
n = 13
Dementia
N = 30 (24)
Delirium with Dementia
n = 13 (12)
Statistics
Background activity Hz
mean ± SD at rest
9.05 ± 0.67 7.67 ± 1.53 7.21 ± 1.12 F(2,54) = 7.60; p < 0.002;
CU >> D >> DD
aP-Peak frequency (Hz) 8.50 ± 0.84 7.27 ± 1.44 6.66 ± 1.13 F(2,46) = 7.30, p < 0.002;
CU >> D >> DD
A/TD-ratio 1.05 ± 1.10 0.60 ± 1.00 0.22 ± 1.18 F(2,46) = 7.84, p < 0.002;
CU > D >> DD;
rP-Delta μV2/Hz 1.21 ± 0.79 1.68 ± 0.79 2.51 ± 0.92 F(2,46) = 8.45, p < 0.001;
CU < D << DD;
rP-Theta1 μV2/Hz 0.62 ± 0.30 1.02 ± 0.44 1.14 ± 0.65 F(2,46) = 5.98, p < 0.005;
CU << D << DD
rP-Theta2 μV2/Hz 1.75 ± 9.6 1.77 ± 6.7 1.61 ± 0.55 F(2,46) = 0.20, p = 0.82
rP-Alpha1 μV2/Hz 2.08 ± 0.94 1.24 ± 0.76 0.86 ± 0.47 F(2,46) = 9.35, p < 0.0005;
CU >> D >> DD
rP-Alpha2 μV2/Hz 0.59 ± 0.29 0.49 ± 0.28 0.32 ± 0.15 F(2,46) = 4.72, p < 0.02;
CU >> DD; D > DD
  1. Absolute Power(aP) values are given for Peak frequency and alpha/theta+delta ratio, frequency bands are given in relative powerdensity values, mean ± Standard deviation, ANOVA statistics and Duncan posthoc-testing, with < or > giving the direction of the difference at a significance level of p < 0.01; >> or << specifying direction at a higher significance level of p < 0.001.