Table 2.

Significant differences in qEEG spectral power.

Channel	Band	Power - Healthy controls (N = 25)	Power - Combined (pre)HD (N = 26)	p-value	t-statistic	Cohen’s d
Fp1	delta	4.5	4.9	0.004	−3.0	0.85
Fp2	delta	4.5	4.9	0.005	−2.9	0.82
F3	theta	3.3	3.0	0.007	2.8	−0.78
F4	theta	3.3	3.1	0.016	2.5	−0.70
Fz	theta	3.4	3.1	0.003	3.1	−0.88
C3	delta	3.6	3.8	0.048	−2.0	0.57
C3	theta	3.1	2.9	0.011	2.7	−0.74
C3	alpha	3.2	2.9	0.025	2.3	−0.65
C4	theta	3.1	2.9	0.004	3.0	−0.85
C4	alpha	3.2	2.9	0.022	2.4	−0.66
Cz	theta	3.3	3.1	0.024	2.3	−0.65
T3	theta	3.3	3.1	0.025	2.3	−0.65
T3	alpha	3.4	3.1	0.049	2.0	−0.56
T4	delta	3.9	4.1	0.031	−2.2	0.62
T4	theta	3.3	3.1	0.024	2.3	−0.66
T4	alpha	3.4	3.1	0.047	2.0	−0.57
T5	theta	3.5	3.2	0.009	2.7	−0.77
T5	alpha	3.7	3.4	0.025	2.3	−0.65
T6	delta	3.9	4.1	0.042	−2.1	0.58
T6	theta	3.4	3.2	0.042	1.8	−0.51
Pz	theta	3.2	3.1	0.031	2.2	−0.62
Pz	alpha	3.5	3.1	0.042	2.1	−0.58

Power values are log10-transformed. N = number of participants. Two-tailed t-test p-values are reported. Degrees of freedom = 49.