Table 3.

Baseline theta band multivariate analyses according to ROI.

Variables	Beta-coefficient	95% CI	p-value	R2
Frontal region				0.330
WOMAC pain scale	− 0.012	− 0.018 to − 0.006	< 0.001
Timed up and go score	0.003	0.001 to 0.005	0.003
HAD-depression scale	0.008	0.0004 to 0.017	0.039
Gender (female)	0.083	0.006 to 0.159	0.034
HAD-Anxiety scale	− 0.004	− 0.011 to 0.003	0.238
Central region				0.374
WOMAC pain scale	− 0.008	− 0.014 to − 0.003	0.001
Timed up and go score	0.005	0.002 to 0.007	< 0.001
Gender (female)	0.104	0.031 to 0.177	0.006
Kellgren–Lawrence scale	− 0.023	− 0.042 to − 0.004	0.019
Age	0.0007	− 0.002 to 0.003	0.556
Parietal region				0.353
Timed up and go total	0.005	0.002 to 0.008	< 0.001
WOMAC pain scale	− 0.008	− 0.013 to − 0.002	0.006
Gender (female)	0.114	0.034 to 0.193	0.006
Kellgren–Lawrence scale	− 0.025	− 0.046 to − 0.004	0.019
Age	0.001	− 0.001 to 0.004	0.429